* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
TASK 72-32-00-440-801
1 . General.
A.This procedure gives instructions to assemble the high pressure compressor (HPC) forward stator assembly (fwd stator assembly) (07000). Refer to Figure 1001.
B.Left and right sides of the forward stator assembly (15-010) or (15-011) (SIN 073A0) and case halves are always from aft looking forward (ALF).
C.Make sure that you build the forward stator assembly in an area that has two hoists available.
D.The upper forward stator assembly case half has four borescope ports, and the lower forward stator assembly case half has built-in brackets.
2 . Tools, Equipment, and Materials.
NOTE:
You can use equivalent alternatives for tools, equipment, and consumable materials.
A.Tools and Equipment.
(1)Special Tools.
 
Tool No.
Description
 
11C3297G01
Fixture, Lift - Aft Stator (lift fixture)
 
11C3301G01
Stand, Adapter - HPC Case Half, Forward (adapter stand)
 
11C3302G02
Pusher, Bushings - IGV/VSV Actuation Rings Stages 1-4 (bushing pusher)
 
11C3305G01
Tool Set, Countertorque - Stator Vanes, Stage 1-4 and IGV (countertorque tool)
NOTE:
Tool 11C3305G01 is an alternative to 11C4653G01.
 
11C4653G01
Set, Holder - Variable Stator Vanes (installation tool)
 
11C4803G01
Fixture, Install - HPC Deflector (install fixture)
(2)Standard Tools and Equipment.
 
Description
Manufacturer
 
Wrench, Hex-Head
Local Purchase
(3)Locally Manufactured Tools. None.
B.Consumable Materials.
 
Code No.
Description
 
C02-008
Petroleum Jelly, VV-P-236 (petrolatum)
 
C02-058
Compound, Thread Lubricating (lubricant)
 
C02-071
Anti-Seize and Lubricating Compound, (GE Spec. D6Y28C1 or A50TF198) (anti-seize)
 
C04-003
Solvent, General (acetone)
 
C04-035
Solvent, General (isopropyl alcohol)
 
C05-003
Marking Pens (pen)
C.Referenced Procedures.
 
ATA No.
Description
 
72-32-09
Inspection 001
 
72-32-10
Inspection 001
D.Expendable Parts.
 
CSN
Description
 
01-020
Lever Pin Bushings
 
01-070
Stage 1 Outer Bushings (bushings)
 
10-010
Washers
 
10-020
Bolts
 
10-030
Nuts
3 . Procedure.
Subtask 72-32-00-440-021
A.Install each forward case assembly (15-010) or (15-011) (SIN 073A0) half on a clean work table, or the 11C3301   adapter stand as follows:
NOTE:
Assembly of the case halves can be completed on a clean work table, or on the recommended 11C3301   adapter stand. One 11C3301   adapter stand is needed for each case half.
NOTE:
The case halves point forward-side down on the table or adapter stand.
(1)Attach the 11C3297   lift fixture on the case half assembly as follows. Refer to Figure 1002.
(a)Put the plate (item 2) on the aft flange of the case half.
(b)Align the boltholes of the plate (item 2) with the boltholes in the aft flange and attach the plate to the upper case half with six capscrews (item 4) and nuts (item 5).
(c)Attach an overhead hoist to the hoist ring (item 3) of the 11C3297   lift fixture.
WARNING:
ALWAYS USE APPROVED EQUIPMENT AND PROCEDURES TO LIFT PARTS. STAY OUT FROM BELOW LOADS. IF THE PARTS ACCIDENTALLY MOVE OR FALL, THEY CAN CAUSE AN INJURY OR KILL YOU.
(2)Lift the case half assembly and put the forward side down on the adapter (item 2) of the 11C3301   adapter stand. Make sure that the first and last boltholes in the forward flange are aligned with holes in the support. Refer to Figure 1003.
(3)Attach the case half assembly to the adapter (item 2) as follows:
(a)Put the washers (item 4) on top of the first and last holes of the forward flange.
(b)Install the capscrews (item 3) through the washers, flange holes, and adapter (item 2) holes.
(c)Attach the washers (item 4) and the nuts (item 5) to the capscrews (item 3) and tighten.
(4)Install the 26 bushings (01-070) (SIN 071T1) on the upper forward case assembly.
(5)Install the 25 remaining bushings on the lower forward case assembly.
(6)Make sure that the bushings are fully seated.
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1001   Forward Stator Case Assembly
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1002   Installation of 11C3297 Lift Fixture
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1003   Installation of the Case Assembly on the Adapter Stand, 11C3301
Subtask 72-32-00-440-025
B.Assemble the VSV adjusting pad screws and lever pin bushings (01-020) (SIN 071TB) into each of the Stage 1-4 actuating rings (ring segments) as follows. Refer to Figure 1004.
(1)Find all eight ring segments and make sure that you have the correct ring segments for each case half. The ring segments have marks for correct identification as follows:
•
Stage 1 upper (SIN 071A1) ring segment with the mark AFT UPPER STAGE 1 on the ring segment.
•
Stage 1 lower (SIN 071A6) ring segment with the mark AFT LOWER STAGE 1 on the ring segment.
•
Stage 2 upper and lower ring segments (SIN 071A2) (interchangeable) with the mark AFT STAGE 2 on the ring segment.
•
Stage 3 upper and lower ring segments (SIN 071A3) (interchangeable) with the mark AFT STAGE 3 on the ring segment.
•
Stage 4 upper (SIN 071A4) ring segment with the mark AFT STAGE 4 on the ring segment.
•
Stage 4 lower (SIN 071A9) ring segment with the mark AFT LOWER STAGE 4 on the ring segment.
(2)From the inboard side of the ring segment, install the long threaded end of the VSV adjusting pad screws into the ring insert. Turn the VSV adjusting pad screw clockwise in the ring segment until it turns freely. Refer to Figure 1004.
NOTE:
There are six VSV adjusting pad screws for each ring segment. There are 48 VSV adjusting pad screws for the complete forward stator assembly.
NOTE:
The VSV adjusting pad screw must turns freely in the actuating ring.
(3)Attach the self-locking nut (nut) to the VSV adjusting pad screw on the outer side of the ring segment.
* * * PRE SB   72-0052( Initial VSV Lever Arm System )
(4)Adjust the VSV adjusting pad screws of the ring segment to the limit of dimension A as follows.
NOTE:
The VSV adjusting pad screw can be turned counterclockwise to increase dimension A and clockwise to decrease dimension A.
(a)Stage 1 upper ring segment (01-030) (SIN 071A1) and stage 1 lower ring segment (01-040) (SIN 071A6), dimension A: 0.301-0.311 inch (7.65-7.90 mm).
(b)Stage 2 upper/lower ring segments (01-080) (SIN 071A2), dimension A: 0.386-0.396 inch (9.80-10.06 mm).
(c)Stage 3 upper/lower ring segments (01-110) (SIN 071A3), dimension A: 0.296-0.306 inch (7.52-7.77 mm).
(d)Stage 4 upper ring segment (01-140) (SIN 071A4) and stage 4 lower ring segment (01-150) (SIN 071A9), dimension A: 0.296-0.300 inch (7.52-7.62 mm).
* * * END PRE SB   72-0052
* * * SB   72-0052( Introduction of New VSV Lever Arm System )
(4).A.Adjust each of the VSV adjusting pad screws of the ring segment to the limit of dimension A and dimension B as follows. Refer to Figure 1005.
NOTE:
The VSV adjusting pad screw can be turned counterclockwise to increase dimension A or B and clockwise to decrease dimension A or B.
(a)Stage 1 upper/lower ring segments (01-030) (SIN 071A1), (01-040) (SIN 071A6), dimension A: 0.290-0.300 inch (7.37-7.62 mm).
(b)Stage 2 upper/lower ring segments (01-080) (SIN 071A2), dimension A: 0.377-0.387 inch (9.58-9.83 mm).
(c)Stage 3 upper/lower ring segments (01-110) (SIN 071A3), dimension A: 0.284-0.294 inch (7.21-7.47 mm).
(d)Stage 4 upper/lower ring segments (01-140) (SIN 071A4), (01-150) (SIN 071A9), dimension B: 0.293-0.303 inch (7.44-7.70 mm).
* * * END SB   72-0052
* * * PRE SB   72-0052( Initial VSV Lever Arm System )
(5)Hold the threaded end of the VSV adjusting pad screws with a hex-head wrench, and torque the nut to 60.0-70.0 lb in. (6.78-7.91 N.m). Make sure that you do not turn the VSV adjusting pad screw, or dimension A can change.
* * * END PRE SB   72-0052
* * * SB   72-0052( Introduction of New VSV Lever Arm System )
(5).A.Hold the threaded end of the VSV adjusting pad screws with a hex-head wrench, and torque the self-locking nut to 60.0-70.0 lb in. (6.78-7.91 N.m). Make sure that you do not turn the VSV adjusting pad screw, or dimension A or B can change.
* * * END SB   72-0052
(6)Use the 11C3302   bushing pusher to install the lever pin bushings from the outboard side of the ring segment as follows. Refer to Figure 1006.
NOTE:
Do not install a lever pin bushing in the last two holes on either side of a ring segment next to the splitline flange (8 holes in each stage). Those bushings will be installed in a later step.
NOTE:
Make sure that each bushing is fully installed in each hole where a connector arm will be installed.
(a)Install the support bed (items 8 through 11) under the actuator ring segment.
NOTE:
The support bed is only required when the actuator ring is installed on the forward stator case.
(b)Align the lever pin bushing in the bore where it will be installed with its protrude opposite to the segment ring.
(c)Insert the mounting pin (item 2) in the internal diameter of the lever pin bushing.
(d)Carefully tap the mounting pin (item 2) as necessary with a rubber hammer, until the lever pin bushing is fully seated.
(7)Install the lever pin bushings in stage 1-4 ring segments. Refer to Subtask 72-32-00-440-025 (paragraph 3.B.(6)) and Figure 1004.
•
Install 43 lever pin bushings in stage 1 ring segments.
•
Install 60 lever pin bushings in stage 2 ring segments.
•
Install 74 lever pin bushings in stage 3 ring segments.
•
Install 83 lever pin bushings in stage 4 ring segments.
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * PRE SB   72-0052( Initial VSV Lever Arm System )
Figure 1004   (Sheet 1 ) Assembly of the VSV Adjusting Pad Screws
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0052( Introduction of New VSV Lever Arm System )
Figure 1004   (Sheet 2 ) Assembly of the VSV Adjusting Pad Screws
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1004   (Sheet 3 ) Assembly of the VSV Adjusting Pad Screws
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * PRE SB   72-0052( Initial VSV Lever Arm System )
Figure 1004   (Sheet 4 ) Assembly of the VSV Adjusting Pad Screws Stage 1-4
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0052( Introduction of New VSV Lever Arm System )
Figure 1005   (Sheet 1 ) Assembly of the VSV Adjusting Pad Screws Stage 1-3
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0052( Introduction of New VSV Lever Arm System )
Figure 1005   (Sheet 2 ) Assembly of the VSV Adjusting Pad Screws Stage 4
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1006   Lever Pin Bushing Installation on the Actuator Ring Segment
Subtask 72-32-00-440-028
C.Install the variable stator vanes (VSV) and washers, into the upper and lower case half assemblies as follows. Refer to Figure 1007.
NOTE:
This procedure is the same for all four stages of the two case assembly halves, unless specified differently. Do this procedure for all stages in this order: stage 4, stage 3, stage 2 and stage 1.
CAUTION:
DO NOT USE PRE SERVICE BULLETIN 72-0052 VSV WITH SERVICE BULLETIN 72-0052 VSV STAGE 1-4 KIT, CONSISTING OF VANES, LEVER ARMS, RING SEGMENTS, BRIDGE CONNECTORS AND SLEEVES, IN THE SAME STAGE. INSTALLING PRE SERVICE BULLETIN 72-0052 VSV WITH SERVICE BULLETIN 72-0052 VSV IN THE SAME STAGE CAN CAUSE ENGINE DAMAGE.
(1)Install the VSV with the leading edge forward from the inside of the case into the vane holes as follows. Make sure the leading edge of each VSV is facing forward (down) as follows:
•
51 stage 1 VSV (10-039) (SIN 072A1) or (10-040) (SIN 072A1) or (10-041) (SIN 072A1) and washers (10-010) (SIN 071J1).
•
68 stage 2 VSV (10-089) (SIN 072A2) or (10-090) (SIN 072A2) or (10-091) (SIN 072A2)
•
82 stage 3 VSV (10-129) (SIN 072A3) or (10-130) (SIN 072A3) or (10-131) (SIN 072A3)
•
91 stage 4 VSV (10-169) (SIN 072A4) or (10-170) (SIN 072A4) or (10-171) (SIN 072A4).
Subtask 72-32-00-440-040
* * * PRE SB   72-0052( Initial VSV Lever Arm System )
(2)Find each of the 8 actuation ring segments and make sure that you have the correct ring segments for each case half. The ring segments have marks for correct identification. Find the correct type and quantity lever arms for the segment you will install.
•
Stage 1 ring segments: upper (071A1) and lower (071A6)
•
Forty-three stage 1 lever arms (071D1) on the upper and lower case assembly
•
Forty-three bushings (01-070) (SIN 071T1) on the upper and lower case assembly
•
Stage 2 ring segments: upper and lower (071A2)
•
Sixty stage 2 lever arms (071D2) on the upper and lower case assembly
•
Stage 3 ring segments: upper and lower (071A3)
•
Seventy-four stage 3 lever arms (071D3) on the upper and lower case assembly
•
Stage 4 ring segments: upper (071A4) and lower (071A9)
•
Eighty-three stage 4 lever arms (071D4) on the upper and lower case assembly.
* * * END PRE SB   72-0052( )
Subtask 72-32-00-440-041
* * * SB   72-0052( Simplified VSV Lever Arm System )
(2).A.Find each of the 8 actuation ring segments and make sure that you have the correct ring segments for each case half. The ring segments have marks for correct identification. Find the correct type and quantity lever arms for the segment you will install.
•
Stage 1 ring segments: upper (071A1) and lower (071A6)
•
Thirty-nine stage 1 lever arms (071D1) and four rigging lever arms (071C0)
•
Forty-three sleeves (071T3) on the upper and lower case
•
Forty-three bushings (01-070) (SIN 071T1) on the upper and lower case
•
Stage 2 ring segments: upper and lower (071A2)
•
Fifty-six stage 2 lever arms (071D2), four rigging lever arms (071C0) and 60 sleeves (071T3) on the upper and lower case
•
Stage 3 ring segments: upper and lower (071A3)
•
Seventy stage 3 lever arms (071D3), four rigging lever arms (071C0) and 74 sleeves (071T3) on the upper and lower case
•
Stage 4 ring segments: upper (071A4) and lower (071A9)
•
Seventy-nine stage 4 lever arms (071D4), four rigging lever arms (071C0) and 83 sleeves (071T4) on the upper and lower case.
* * * END SB   72-0052
Subtask 72-32-00-220-005
(3)Do an inspection of all the VSV vanes for correct orientation as follows:
Subtask 72-32-00-440-079
(a)Alternative Procedure Available. Install the 11C4653   installation tool on the stage 1 vanes (10-039) (SIN 072A1) or (10-040) (SIN 072A1) or (10-041) (SIN 072A1). Starting from the left when facing the inside of a stator half-case, slide the stage 1/1 over the first several vanes. Resistance to the tool fitting over the vanes is likely a indication that there is a reversed vane. If there is resistance to the tool fitting over the vanes, remove the tool and do an inspection of the vane section for a reversed vane. If any vane is found in the reverse direction, correct the vane orientation. Refer to Figure 1009, Figure 1010, and as follows:
WARNING:
DO NOT FORCE THE TOOL ONTO THE VANES. IF YOU FORCE THE TOOL, YOU CAN CAUSE INJURY TO YOUR HANDS.
CAUTION:
IF YOU FORCE THE TOOL ONTO THE VANES, DAMAGE TO ENGINE HARDWARE CAN OCCUR.
CAUTION:
MAKE SURE THAT THE HOLDERS SIT DOWN FLUSH ON THE VANES OR DAMAGE TO THE ENGINE HARDWARE CAN OCCUR.
1Do this procedure again for the remaining sections of stage 1 as well as for the tool stages 2, 3, and 4.
2Do not remove this tool now, this tool will also be used to restrain rotation while torquing the nuts (01-010) (SIN 071K0).
Subtask 72-32-00-220-006
(a)Alternative Procedure. Do a visual inspection of all the vanes to make sure that they are installed in the right direction. No vane must be installed in the reverse direction.
Subtask 72-32-00-440-051
* * * PRE SB   72-0052( Initial VSV Lever Arm System )
CAUTION:
MAKE SURE THAT THE CRIMPING PINS OF ALL OF THE LEVER ARMS ARE FULLY ENGAGED IN THE ACTUATING RING SEGMENTS OR DAMAGE TO THE ENGINE CAN OCCUR.
(6)Put a ring segment in position on the outside of the case and temporarily attach it to the case half assembly with three equally spaced lever arms pushed onto the VSV. Insert the crimping pin of each lever arm into the related bushing in the ring segment.
NOTE:
Make sure the flat side of the lever arm hole touches the flat side of the tip of the VSV. Make sure that the rounded side of the lever arm hole touches the rounded side of the tip of the VSV. Refer to Figure 1007.
NOTE:
The three lever arms will be sufficient to temporarily hold the ring segment in place.
* * * END PRE SB   72-0052
Subtask 72-32-00-440-052
* * * SB   72-0052( Simplified VSV Lever Arm System )
CAUTION:
MAKE SURE THAT THE CRIMPING PINS OF ALL OF THE LEVER ARMS ARE FULLY ENGAGED IN THE ACTUATING RING SEGMENTS OR DAMAGE TO THE ENGINE CAN OCCUR.
(6).A.Put a ring segment in position on the outside of the case and temporarily attach it to the case half assembly with three equally spaced sleeves (01-190) (SIN 071T3), (01-200) (SIN 071T4), and lever arms (01-050) (SIN 071D1), (01-090) (SIN 071D2), (01-120) (SIN 071D3), and (01-160) (SIN 071D4) (stage 1, 2, 3, and 4 respectively) and pushed onto the VSV.
(a)Insert the crimping pin of each lever arm into the related bushing in the ring segment.
NOTE:
Make sure the flat side of the lever arm hole touches the flat side of the tip of the VSV. Make sure that the rounded side of the lever arm hole touches the rounded side of the tip of the VSV. Refer to Figure 1007.
NOTE:
The three lever arms will be sufficient to temporarily hold the ring segment in place.
* * * END SB   72-0052
Subtask 72-32-00-440-053
* * * PRE SB   72-0052( Initial VSV Lever Arm System )
(7)Install the remaining lever arms on the ring segment.
* * * END PRE SB   72-0052
Subtask 72-32-00-440-054
* * * SB   72-0052( Simplified VSV Lever Arm System )
(7).A.Install the remaining lever arms (01-050) (SIN 071D1), (01-090) (SIN 071D2), (01-120) (SIN 071D3), and (01-160) (SIN 071D4) (stage 1, 2, 3, and 4 respectively) and rigging lever arms (01-180) (SIN 071C0) on the ring segments. Make sure that four rigging lever arms (01-180) (SIN 071C0) are installed in correct vane locations as follows:
•
Stage 1 - No. 6, 15, 32, and 40
•
Stage 2 - No. 8, 24, 42, and 58
•
Stage 3 - No. 11, 31, 52, and 72
•
Stage 4 - No. 14, 33, 56, and 74.
NOTE:
The lever arm No. 1 is the first vane on the upper case at the 9:00 o'clock position ALF.
* * * END SB   72-0052
Subtask 72-32-00-440-043
(8)Push the lever arms on the VSV with the crimping pin pointed inward into the ring segment.
(9)Make sure that the flat side of the lever arm hole touches the flat side of the tip of the VSV.
(10)Make sure that the rounded side of the lever arm hole touches the rounded side of the tip of the VSV. Refer to Figure 1007.
(11)Do not install lever arms on the last two vanes on each side of the split line flange on any of the stages 1-4. Those lever arms will be installed in a later step.
(12)Attach the nuts (071K0) to the threads of the VSV and turn them until hand-tight.
Subtask 72-32-00-440-074
(13)Alternative Procedure Available. Torque the nuts (01-010) (SIN 071K0) as follows:
(a)For the installation of the 11C4653   installation tool on stages 1, 2, 3, and 4. Refer to Subtask 72-32-00-220-005 (paragraph 3.C.(3)(a)), and Figure 1009, and Figure 1010.
(b)Torque the nuts (01-010) (SIN 071K0) for the values provided in Figure 1008.
(c)Manually turn the VSVs to make sure that they do not interfere with the case half.
Subtask 72-32-00-440-075
(13).A.Alternative Procedure. Torque the nuts (01-010) (SIN 071K0) as follows:
(a)Install the 11C3305   countertorque tool to hold the stages 1, 2, 3, and 4 ring segments (01-030) (SIN 071A1), (01-040) (SIN 071A6), (01-080) (SIN 071A2), (01-110) (SIN 071A3), (01-140) (SIN 071A4), and (01-150) (SIN 071A9). Refer to Figure 1011 and do as follows:
1Put the block (item 6) on the stages 1, 2, 3, and 4 upper/lower sectors (item 2, item 3, item 4, item 5, item 13, and item 14).
2Install the capscrew (item 19) to attach the block (item 6) to the stages 1, 2, 3, and 4 upper/lower sectors (item 2, item 3, item 4, item 5, item 13, and item 14).
3Put the upper stage 1 sector (item 2) (STG 1 UPPER) on the stage 1 upper ring segment (01-030) (SIN 071A1).
4Put the lower stage 1 sector (item 14) (STG 1 LOWER) on the stage 1 lower ring segment (01-040) (SIN 071A6).
5Put the stage 2 sector (item 3) (STG 2) on the upper and lower stage 2 ring segment (01-080) (SIN 071A2).
6Put the stage 3 sector (item 4) (STG 3) on the upper and lower stage 2 ring segment (01-110) (SIN 071A3).
7Put the upper stage 4 sector (item 5) (STG 4 UPPER) on the stage 4 upper ring segment (01-140) (SIN 071A4).
8Put the lower stage 4 sector (item 13) (STG 4 LOWER) on the stage 4 lower ring segment (01-150) (SIN 071A9).
9Tighten the two threaded screws (item 17) to attach firmly the stages 1, 2, 3, and 4 upper/lower sectors (item 2, item 3, item 4, item 5, item 13, and item 14) to the stages 1, 2, 3, and 4 ring segments (01-030) (SIN 071A1), (01-040) (SIN 071A6), (01-080) (SIN 071A2), (01-110) (SIN 071A3), (01-140) (SIN 071A4), and (01-150) (SIN 071A9).
NOTE:
The upper stage 1 sector (item 2) (STG 1 UPPER) and the lower stage 1 sector (item 14) (STG 1 LOWER) only have one threaded screw (item 17).
(b)Torque the nuts (01-010) (SIN 071K0) for the values provided in Figure 1008.
(c)Manually turn the VSVs to make sure that they do not interfere with the case half.
(d)Remove the 11C3305   countertorque tool from stages 1, 2, 3, and 4.
Subtask 72-32-00-440-076
(14)Deleted.
(15)Deleted.
Subtask 72-32-00-440-045
* * * PRE SB   72-0052( Initial VSV Lever Arm System )
(16)Install the lever arms with the crimping pins pointed outward on the last two VSVs on each side of the split line flange on the stages 1-4 on the upper and lower case assemblies as follows:
•
Eight stage 1 lever arms (071D6) with eight bushings (01-070) (SIN 071T1) on the upper and lower case assembly
•
Eight stage 2 lever arms (071D7) on the upper and lower case assembly
•
Eight stage 3 lever arms (071D8) on the upper and lower case assembly
•
Eight stage 4 lever arms (071D9) on the upper and lower case assembly.
* * * END PRE SB   72-0052
Subtask 72-32-00-440-046
* * * SB   72-0052( Simplified VSV Lever Arm System )
(16).A.Install the lever arms with the crimping pins pointed outward on the last two VSVs on each side of the split line flange on the stages 1-4 on the upper and lower case assemblies as follows:
•
Eight stage 1 lever arms (071D6) with eight bushings (01-070) (SIN 071T1) and eight sleeves (071T3) on the upper and lower case assembly
•
Eight stage 2 pin-up lever arms (071D7) and eight sleeves (071T3) on the upper and lower case assembly
•
Eight stage 3 pin-up lever arms (071D8) and eight sleeves (071T3) on the upper and lower case assembly
•
Eight stage 4 pin-up lever arms (071D9) and eight sleeves (071T4) on the upper and lower case assembly.
* * * END SB   72-0052
Subtask 72-32-00-440-047
(17)Attach the nuts (071K0) to the threads of the tip of the VSV and tighten hand-tight.
(18)Deleted.
Subtask 72-32-00-440-077
(19)Alternative Procedure Available. Torque the nuts (01-010) (SIN 071K0) as follows:
(a)For the installation of the 11C4653   installation tool on the stages 1, 2, 3, and 4 vanes. Refer to Subtask 72-32-00-220-005 (paragraph 3.C.(3)(a)), Figure 1009, and Figure 1010.
(b)Torque the nuts (01-010) (SIN 071K0) for the values provided in Figure 1008.
(c)Remove the 11C4653   installation tool from all stages 1, 2, 3, and 4.
Subtask 72-32-00-440-078
(19).A.Alternative Procedure. Torque the nuts (01-010) (SIN 071K0) as follows:
(a)Put the stage 1 stator vane holder (item 16) of the 11C3305   countertorque tool on the stage 1 VSV (10-039) (SIN 072A1) or (10-040) (SIN 072A1) or (10-041) (SIN 072A1).
(b)Put the stages 2, 3, and 4 stator vane holder (item 17) of the 11C3305   countertorque tool on the VSV (10-089) (SIN 072A2) or (10-090) (SIN 072A2) or (10-091) (SIN 072A2), (10-129) (SIN 072A3) or (10-130) (SIN 072A3) or (10-131) (SIN 072A3), and (10-169) (SIN 072A4) or (10-170) (SIN 072A4) or (10-171) (SIN 072A4).
(c)Torque the nuts (01-010) (SIN 071K0) for the values provided in Figure 1008.
(d)Remove the stage 1 stator vane holder (item 16) and the stages 2, 3, and 4 stator vane holder (item 17) of the 11C3305   countertorque tool.
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * PRE SB   72-0052( Initial VSV Lever Arm System )
Figure 1007   (Sheet 1 ) Installation of the Stages 1-4 VSV, Vane Shrouds and Stator Seals
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0052( Simplified VSV Lever Arm System )
Figure 1007   (Sheet 2 ) Installation of the Stages 1-4 VSV, Vane Shrouds and Stator Seals
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * PRE SB   72-0052( Initial VSV Lever Arm System )
Figure 1007   (Sheet 3 ) Installation of the Stages 1-4 VSV, Vane Shrouds and Stator Seals
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0052( Simplified VSV Lever Arm System )
Figure 1007   (Sheet 4 ) Installation of the Stages 1-4 VSV, Vane Shrouds and Stator Seals
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1007   (Sheet 5 ) Installation of the Stages 1-4 VSV, Vane Shrouds and Stator Seals
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1007   (Sheet 6 ) Installation of the Stages 1-4 VSV, Vane Shrouds and Stator Seals
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1007   (Sheet 7 ) Installation of the Stages 1-4 VSV, Vane Shrouds and Stator Seals
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0052( Simplified VSV Lever Arm System )
Figure 1007   (Sheet 8 ) Installation of the Stages 1-4 VSV, Vane Shrouds and Stator Seals
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1008   Torque Values for VSV Self-Locking Nut
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1009   Set Holder - Variable Stator Vanes , 11C4653
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1010   Installation of Set Holder - Variable Stator Vanes, 11C4653
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1011   (Sheet 1 ) Stator Vane Countertorque Tool, 11C3305
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1011   (Sheet 2 ) Stator Vane Countertorque Tool, 11C3305
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1011   (Sheet 3 ) Stator Vane Countertorque Tool, 11C3305
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1011   (Sheet 4 ) Stator Vane Countertorque Tool, 11C3305
Subtask 72-32-00-440-029
D.Install the Stages 1-4 compressor stator vane shrouds (vane shrouds) (071B1, 071B6, 071B2, 071B3, 071B4, 071B9) as follows. Refer to Figure 1007.
NOTE:
Shrouds are a matched set and must be installed as a matched set.
(1)Install the stage 4 shrouds (071B4, 071B9) as follows:
NOTE:
This procedure is the same for the two case assembly halves, unless specified differently.
(a)Install the upper case vane shroud vane shroud (071B4) on the inner trunnions of the vanes and on the upper case half assembly.
(b)Install the lower case vane shroud (071B9) on the inner trunnions of the vanes and on the lower case half assembly.
(c)Install the bolts (10-020) (SIN 071F1) and nuts (10-030) (SIN 071K2) with the flat of the bolthead facing inboard on the stage 4 upper/lower case vane shrouds.
(d)Torque the nuts to 32-38 lb-in. (3.7-4.3 N.m).
(2)Install the stage 3 vane shrouds (071B3) as follows:
NOTE:
This procedure is the same for both case assembly halves, unless specified differently.
(a)Put the upper and lower case vane shrouds (071B3) on the inner trunnion of the vanes.
(b)Install the bolts (10-020) (SIN 071F1) and nuts (10-030) (SIN 071K2) with the flat of the bolthead pointing inboard on the stage 3 upper/lower case shrouds.
(c)Torque the nuts to 32-38 lb-in. (3.7-4.3 N.m).
(3)Install the stage 2 vane shrouds (071B2) as follows:
NOTE:
This procedure is the same for the two case assembly halves, unless specified differently.
(a)Put the upper and lower case vane shrouds (071B2) on the inner trunnions of the vanes.
(b)Install the bolts (10-020) (SIN 071F1) and nuts (10-030) (SIN 071K2) with the flat of the bolthead facing inboard on the stage 2 upper/lower case shrouds.
(c)Torque the nuts to 32-38 lb-in. (3.7-4.3 N.m).
(4)Install the stage 1 vane shrouds (071B1, 071B6) as follows:
NOTE:
This procedure is the same for the two case assembly halves, unless specified differently.
(a)Install the upper case vane shroud vane shroud (071B1) on the inner trunnions of the vanes and on the upper case half assembly.
(b)Install the lower case vane shroud (071B6) on the inner trunnions of the vanes and on the lower case half assembly.
(c)Install the bolts (10-020) (SIN 071F1) and nuts (10-030) (SIN 071K2) with the flat of the bolthead facing inboard on the stage 1 upper/lower case vane shrouds.
(d)Torque the nuts to 32-38 lb-in. (3.7-4.3 N.m).
Subtask 72-32-00-440-031
E.Install the Stages 1-4 HPC compressor stator seals (stator seals) as follows. Refer to Figure 1007.
•
Stage 1 stator seals (076AA, 076A1)
•
Stage 2 stator seals (076AB, 076A2)
•
Stage 3 stator seals (076AC, 076A3)
•
Stage 4 stator seals (076AD, 076A4).
NOTE:
This procedure is the same for all four stages and both case assembly halves, unless specified differently.
(1)Apply a large quantity of C02-008  petrolatum to the stator seals where they will mate with the vane shroud slots.
CAUTION:
DO NOT APPLY FORCE INCORRECTLY TO INSTALL THE STATOR SEAL. YOU CAN EASILY DAMAGE THE STATOR SEAL.
(2)Use your hand to slide the stator seals into place against the vane shroud slots. Begin sliding the stator seals at the horizontal split line as follows:
(a)The stator seals (076A1, 076A2, 076A3, 076A4) will be installed from the 3:00 o'clock split line to the 12:00 o'clock position and from the 9:00 o'clock split line to the 6:00 o'clock position.
(b)The stator seals (076AA, 076AB, 076AC, 076AD) will be installed from the 3:00 o'clock split line to the 6:00 o'clock position and from the 9:00 o'clock split line to the 12:00 o'clock position.
(3)Make sure that the stator seals are seated correctly against the upper and lower vane shrouds. Make sure the ends of the stator seals do not extend past the split line flange. Make sure that after the assembly, stage 3 stator seals (10-160) (SIN 076AC) and stage 4 stator seals (10-210) (SIN 076AD) sit flush with the upper and lower vane shrouds. Refer to Figure 1012 for comparison. If the seals don't sit flush per Figure 1012, refer to CIR TASK 72-32-09-100-803 (72-32-09, INSPECTION 001) (Subtask 72-32-09-220-031) for HPC stator stage 3 vane shrouds or TASK 72-32-10-200-801 (72-32-10, INSPECTION 001) (Subtask 72-32-10-220-004) for HPC stator stage 4 vane shrouds, for repair options.
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1012   Stage 3 and 4 Stator Seals Shrouds
Subtask 72-32-00-440-032
F.Use hand force to actuate each ring segment and each lever arm that is not captured by a ring segment. Make sure that the ring segment moves smoothly with no binding. If too much force is necessary, check for assembly errors and correct.
Subtask 72-32-00-440-033
* * * FOR 1B/P/G03.1B/P/G04
* * * PRE SB   72-0060( Initial Aft Cover Design )
* * * PRE SB   72-0305( Old Aft Covers Configuration )
G.Install the aft covers (15-020) (SIN 070AG), (15-040) (SIN 070AJ), (15-030) (SIN 070AR) and (15-050) (SIN 070AS) on the rear flanges of the compressor case half assembly. Refer to Figure 1013.
WARNING:
ISOPROPYL ALCOHOL IS TOXIC AND FLAMMABLE. USE PERSONAL PROTECTION EQUIPMENT. USE IN A WELL-VENTILATED AREA.
(1)If necessary, clean the rails on the upper/lower case half assembly and the aft covers with C04-035  isopropyl alcohol.
(2)Apply a thin film of C02-008  petrolatum to the edges installed first in the case assembly.
(3)Manually move the aft covers (15-040) (SIN 070AJ) and (15-050) (SIN 070AS) in the upper half case assembly. The aft cover (15-040) (SIN 070AJ) will be installed from the 12:00 o'clock to the 3:00 o'clock of the case assembly. The aft cover (15-050) (SIN 070AS) will be installed from the 9:00 o'clock to the 12:00 o'clock of the case assembly. Move the aft cover around until the stop seats against the case assembly.
(4)Manually move the aft covers (15-020) (SIN 070AG) and (15-030) (SIN 070AR) in the lower half case assembly. The aft cover (15-020) (SIN 070AG) will be installed from the 3:00 o'clock to the 6:00 o'clock of the case assembly. The aft cover (15-030) (SIN 070AR) will be installed from the 6:00 o'clock to the 9:00 o'clock of the case assembly. Move the aft cover around until the stop seats against the case assembly.
* * * END PRE SB   72-0060( )
* * * END PRE SB   72-0305
Subtask 72-32-00-440-088
* * * FOR 1B/P/G03.1B/P/G04
* * * SB   72-0305( New Aft Covers Configuration )
G.A.Install the aft covers (15-021) (SIN 070AG), (15-040) (SIN 070AJ), (15-030) (SIN 070AR), and (15-050) (SIN 070AS) on the rear flanges of the compressor case half assembly. Refer to Figure 1013.
WARNING:
REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.
(1)If necessary, clean the rails on the upper/lower case half assembly and the aft covers with C04-035  isopropyl alcohol.
WARNING:
REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.
(2)Apply a thin film of C02-008  petrolatum to the edges installed first in the case assembly.
(3)Manually move the aft covers (15-040) (SIN 070AJ) and (15-050) (SIN 070AS) in the upper half case assembly. The aft cover (15-040) (SIN 070AJ) will be installed from the 12:00 o'clock to the 3:00 o'clock of the case assembly. The aft cover (15-050) (SIN 070AS) will be installed from the 9:00 o'clock to the 12:00 o'clock of the case assembly. Move the aft cover around until the stop seats against the case assembly.
NOTE:
Attachment could be done either manually or with the 11C4803   install fixture.
(4)Manually move the aft covers (15-021) (SIN 070AG) and (15-030) (SIN 070AR) in the lower half case assembly. The aft cover (15-021) (SIN 070AG) will be installed from the 3:00 o'clock to the 6:00 o'clock of the case assembly. The aft cover (15-030) (SIN 070AR) will be installed from the 6:00 o'clock to the 9:00 o'clock of the case assembly. Move the aft cover around until the stop seats against the case assembly.
NOTE:
Attachment could be done either manually or with the 11C4803   install fixture.
* * * END SB   72-0305
Subtask 72-32-00-440-049
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0060( Simplified Aft Cover Design )
* * * PRE SB   72-0305( New Aft Covers Configuration )
G.B.Install the aft covers (15-021) (SIN 070AG) and (15-041) (SIN 070AJ) on the rear flanges of the compressor case half assembly. Refer to Figure 1013.
WARNING:
ISOPROPYL ALCOHOL IS TOXIC AND FLAMMABLE. USE PERSONAL PROTECTION EQUIPMENT. USE IN A WELL-VENTILATED AREA.
(1)If necessary, clean the rails on the upper/lower case half assembly and the aft covers with C04-035  isopropyl alcohol.
(2)Apply a thin film of C02-008  petrolatum to the edges installed first in the case assembly.
(3)Manually move the aft covers (15-021) (SIN 070AG) and (15-041) (SIN 070AJ) in the upper half case assembly. The aft cover (15-041) (SIN 070AJ) will be installed from the 12:00 o'clock to the 3:00 o'clock of the case assembly. The aft cover (15-021) (SIN 070AG) will be installed from the 9:00 o'clock to the 12:00 o'clock of the case assembly. Move the aft cover around until the stop seats against the case assembly.
(4)Manually move the aft covers (15-021) (SIN 070AG) and (15-041) (SIN 070AJ) in the lower half case assembly. The aft cover (15-021) (SIN 070AG) will be installed from the 3:00 o'clock to the 6:00 o'clock of the case assembly. The aft cover (15-041) (SIN 070AJ) will be installed from the 6:00 o'clock to the 9:00 o'clock of the case assembly. Move the aft cover around until the stop seats against the case assembly.
* * * END SB   72-0060
* * * END PRE SB   72-0305
Subtask 72-32-00-440-089
* * * SB   72-0305( New Aft Covers Configuration )
G.C.Install the aft covers (15-021) (SIN 070AG), (15-041) (SIN 070AJ), (15-030) (SIN 070AR), and (15-050) (SIN 070AS) on the rear flanges of the compressor case half assembly. Refer to Figure 1013.
WARNING:
REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.
(1)If necessary, clean the rails on the upper/lower case half assembly and the aft covers with C04-035  isopropyl alcohol.
WARNING:
REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.
(2)Apply a thin film of C02-008  petrolatum to the edges installed first in the case assembly.
(3)Manually move the aft covers (15-041) (SIN 070AJ) and (15-050) (SIN 070AS) in the upper half case assembly. The aft cover (15-041) (SIN 070AJ) will be installed from the 12:00 o'clock to the 3:00 o'clock of the case assembly. The aft cover (15-050) (SIN 070AS) will be installed from the 9:00 o'clock to the 12:00 o'clock of the case assembly. Move the aft cover around until the stop seats against the case assembly.
(4)Manually move the aft covers (15-021) (SIN 070AG) and (15-030) (SIN 070AR) in the lower half case assembly. The aft cover (15-021) (SIN 070AG) will be installed from the 3:00 o'clock to the 6:00 o'clock of the case assembly. The aft cover (15-030) (SIN 070AR) will be installed from the 6:00 o'clock to the 9:00 o'clock of the case assembly. Move the aft cover around until the stop seats against the case assembly.
* * * END SB   72-0305
* * * FOR 1B/P/G03.1B/P/G04
* * * PRE SB   72-0060( Initial Aft Cover Design )
* * * PRE SB   72-0305( Old Aft Covers Configuration )
Figure 1013   (Sheet 1 ) Installation of the Aft Covers and Borescope Plugs
* * * FOR 1B/P/G03.1B/P/G04
* * * SB   72-0305( New Aft Covers Configuration )
Figure 1013   (Sheet 2 ) Installation of the Aft Covers and Borescope Plugs
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0060( Simplified Aft Cover Design )
* * * PRE SB   72-0305( Old Aft Covers Configuration )
Figure 1013   (Sheet 3 ) Installation of the Aft Covers and Borescope Plugs
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0305( New Aft Covers Configuration )
Figure 1013   (Sheet 4 ) Installation of the Aft Covers and Borescope Plugs
* * * FOR 1B/P/G03.1B/P/G04
* * * PRE SB   72-0060( Initial Aft Cover Design )
* * * PRE SB   72-0305( Old Aft Covers Configuration )
Figure 1013   (Sheet 5 ) Installation of the Aft Covers and Borescope Plugs
* * * FOR 1B/P/G03.1B/P/G04
* * * SB   72-0305( New Aft Covers Configuration )
Figure 1013   (Sheet 6 ) Installation of the Aft Covers and Borescope Plugs
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0060( Simplified Aft Cover Design )
* * * PRE SB   72-0305( Old Aft Covers Configuration )
Figure 1013   (Sheet 7 ) Installation of the Aft Covers and Borescope Plugs
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0305( New Aft Covers Configuration )
Figure 1013   (Sheet 8 ) Installation of the Aft Covers and Borescope Plugs
Subtask 72-32-00-220-009
H.Do a visual inspection of the borescope plugs and ports. Refer to TASK 72-00-00-800-804 (72-00-00, SPECIAL PROCEDURE 004) (paragraph 5.A. and 5.B.).
Subtask 72-32-00-440-034
* * * PRE SB   72-0246
I.Install the borescope plugs (05-010) (SIN 070AK) stage 2, (05-020) (SIN 070AL) stage 3, (05-030) (SIN 070AM) stage 4, and (05-040) (SIN 070AB) stage 5 into the upper half case assembly. Refer to Figure 1013 and do as follows:
(1)Verify that a 0.25 inch (6.350 mm) minimum diameter pin will pass through each borescope hole in the upper half case assembly.
(2)Apply C02-071  anti-seize to the threads and friction surfaces of each borescope plug.
(3)Turn the borescope plugs into the borescope ports until tight.
(4)Torque the borescope plugs to 81-95 lb in. (9.2-10.7 N.m).
(5)After the plug has been torqued, perform a visual inspection of the plug and make sure that the locking feature is fully engaged with the lug on the borescope boss. Also make sure that the head of the borescope plug is fully seated against the borescope boss. If one of the two conditions are not met, the ratcheting feature of the plug can be seized or locked. Apply a penetrating oil directly in between the locking ring and the head of the plug. Re-apply torque to the plug until the plug begins to rotate freely. Tighten the plug from 81 to 95 lb in. (9.2 to 10.7 Nm). Do the visual inspection again before proceeding. If the conditions above cannot be met, replace the plug. Refer to Figure 1014.
* * * END PRE SB   72-0246
Subtask 72-32-00-440-090
* * * SB   72-0246
I.A.Install the borescope plugs (05-010) (SIN 070AK) stage 2, (05-020) (SIN 070AL) stage 3, (05-030) (SIN 070AM) stage 4, and (05-040) (SIN 070AB) stage 5 into the upper half case assembly. Refer to Figure 1013 and do as follows:
(1)Verify that a 0.25 inch (6.350 mm) minimum diameter pin will pass through each borescope hole in the upper half case assembly.
(2)Apply C02-071  anti-seize to the threads and friction surfaces of each borescope plug.
(3)Turn the borescope plugs into the borescope ports until tight.
(4)Torque the borescope plugs to 81 to 95 lb in. (9.2 to 10.7 Nm).
* * * END SB   72-0246
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * PRE SB   72-0246
Figure 1014   (Sheet 1 ) Correct/Incorrect Installation of BSI Plugs
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
* * * SB   72-0246
Figure 1014   (Sheet 2 ) Correct/Incorrect Installation of BSI Plugs
Subtask 72-32-00-440-039
J.Install 32 lever pin bushings (01-020) (SIN 071TB) into the stages 1-4 actuation ring bridges (bridges) (071E1, 071E2, 071E3, 071E4, 071E6, 071E9) as follows. Refer to Figure 1015.
NOTE:
Four bushings are installed into each bridge.
(1)Align the lever pin bushing in the bore where it will be installed with its protrude opposite to the bridge.
(2)Insert the mounting pin (item 2) of the 11C3302   bushing pusher in the internal diameter of the lever pin bushing.
(3)Carefully tap the mounting pin (item 2) as necessary with a rubber hammer, until the bushing is fully seated.
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1015   Installation of the Lever Pin Bushing into the Bridge
Subtask 72-32-00-440-038
K.Install the two VSV actuator supports (05-050) (SIN 075C0) as follows. Refer to Figure 1016.
(1)Install one VSV actuator support on each case assembly half with the bolts (05-060) (SIN 075F3). The VSV actuator support boltholes are between the stages 1 and 2 VSV holes, between 35 and 60 degrees counterclockwise from the horizontal centerline of the case assembly.
(2)Lubricate the threads of bolts with C02-058  lubricant.
(3)Torque the bolts (05-060) (SIN 075F3) to 106-124 lb in. (12.0-14.0 N.m).
(4)Make sure that all of the vane holes in each stage of the case half assembly have a inner bushing and an outer bushing.
* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01
Figure 1016   Installation of the VSV Actuator Supports
Subtask 72-32-00-440-036
L.Put the remaining parts that you will install at the next higher assembly level in bags as follows:
•
Actuation ring bridge attach bolts: eight stage 1 (075F2), 12 each stage 2 (075F2), stage 3 (075F2), and stage 4 (075F2)
•
Horizontal mating flange: 32 bolts (073G3) and self-locking nuts (073L2)
•
Horizontal mating flange: two aft bolts (073G5) and self-locking nuts (073L3)
•
Actuation ring bridges: stage 1 (071E1, 071E6), two stage 2 (071E2), two stage 3 (071E3), and stage 4 (071E4, 071E9)
•
Actuation ring bridge: 16 alignment pins (075V1).