* * * FOR ALL
TASK 72-51-01-300-804
1 . Weld Repair of Outer Flange Cracks.
A.This procedure gives instructions to repair the high pressure turbine stage 1 nozzle support (nozzle support) by welding cracks on the outer flange. Refer to Figure 901.
B.The following maximum repairable limits apply to this repair:
NOTE:
The information below gives maximum repairable limits for the applicable Inspection sections. The paragraphs are numbered the same as the manual Inspection sections.
(4)Visual Inspection.
(b)Do an inspection of the outer flange area for:
2Radial cracks from the outer diameter:
Maximum repairable limit:
Any amount.
(c)Measure dimension D:
Maximum repairable limit:
Any amount.
(d)Runout at diameter BA:
Maximum repairable limit:
Any amount. If only diameter BA needs to be repaired, start the procedure at Subtask 72-51-01-350-041 (paragraph 5.Y.).
C.The subsequent table gives a list of the part numbers that are applicable to this repair. All part numbers are applicable to all paragraphs unless specified differently.
 
Part Number(s)
 
2407M46G02  
2407M46G04  
Deleted
2407M46G06  
 
2407M46G08  
--
--
--
D.Proprietary/Complex Process Statement.
(1)None.
2 . Tools, Equipment, and Materials.
NOTE:
Repair sources can use equivalent alternatives for tools, equipment, and consumable materials, however, the repair source must demonstrate and document equivalency.
A.Tools and Equipment.
(1)Special Tools. None.
(2)Standard Tools and Equipment. None.
(3)Locally Manufactured Tools.
 
Description
Figure
 
Machining Fixture
903
B.Consumable Materials.
 
Code No.
Description
 
C04-113
Abrasive, Grit, Aluminum Oxide (220 mesh abrasive compound)
 
C06-037
Weld Wire, GTD222 (GTD 222 weld wire)
 
C10-155
Shims, Metal (shims)
C.Referenced Procedures.
 
ATA No.
Description
 
70-00-03
Machining Data
 
70-16-00
Marking Practices
 
70-16-08
Dot Peen Marking for Optical Character Recognition
 
70-21-00
Chemical Cleaning
 
70-21-04
Cleaning Method No. 4 - Dry Abrasive Blast Cleaning
 
70-24-00
Etching Procedures for Fluorescent-Penetrant Inspection
 
70-24-01
Swab Etching Procedure
 
70-32-00
Indirect Inspection Methods
 
70-32-02
Fluorescent Penetrant Inspection
 
70-32-03
Spot-Fluorescent-Penetrant Inspection
 
70-32-05
Radiographic Inspection
 
70-33-00
Special Inspection Procedures
 
70-33-02
Capillary Inspection of Open Face Honeycomb Structures
 
70-41-00
Welding and Brazing Practices
 
70-41-03
High Temperature Furnace Braze
 
70-42-00
Blending and Removal of High Metal Procedures
 
70-44-00
Heat Treating
 
70-44-03
Furnace Heat Treatment
 
72-51-01
Cleaning 001
 
72-51-01
Inspection 001
 
72-51-01
Repair 001
 
72-51-01
Repair 011
 
--
GEAE Photo Standard 8311253, Class 30
D.Expendable Parts. None.
E.SPD Information.
 
CSN
Description
 
--
Pin (2323M96P08)
 
--
Pin (2323M96P09)
 
--
Pin (2323M96P10)
 
--
Pin (2323M96P11)
 
--
Pin (2323M96P12)
 
--
Pin (2323M96P13)
 
--
Pin (2323M96P14)
 
--
Pin (2323M96P15)
 
--
Pin (2323M96P16)
 
--
Pin (2323M96P17)
 
--
Pin (2323M96P18)
 
--
Pin (2323M96P19)
 
--
Pin (2323M96P20)
 
--
Pin (2323M96P21)
(1)Locally Manufactured SPD.
 
Description
Figure
 
Pin
905
F.Special Solutions. None.
G.Test Specimens. None.
3 . Dimensional Information.
Subtask 72-51-01-220-064
A.Refer to Figure 901 and Figure 902 for specified dimensions and locations.
NOTE:
The dimensional data identified within this procedure was designed using inches as the base unit of measurement for dimensional values. The conversion to millimeters is rounded to one less decimal digit than inches. For minimum dimensions, converted values are rounded up. For maximum dimensions, converted values are rounded down. To avoid conversion errors, do not re-convert from millimeters to inches.
NOTE:
Reference dimensions do not require inspection.
NOTE:
Unless specified differently, all diameter measurements must be the average of eight equally spaced locations.
NOTE:
Unless specified differently, all drop dimension measurements must be the average of eight equally spaced circumferential locations.
NOTE:
Applicable for part number 2407M46G08.
 
Description
Minimum In-Process Dimension
Maximum In-Process Dimension
Minimum Serviceable Dimension
Minimum Finish Dimension
Maximum Finish Dimension
Reference Dimension
 
Dia M
25.522 in. (648.26 mm)
--
--
26.500 in. (673.10 mm)
26.508 in. (673.30 mm)
--
 
Dia M
NOTE 5
25.522 in. (648.26 mm)
--
--
26.480 in. (672.60 mm)
26.488 in. (672.79 mm)
--
 
Dia BA
23.580 in. (598.93 mm)
--
23.584 in. (599.03 mm)
--
--
--
4 . Setup Information.
Subtask 72-51-01-350-032
A.Set-up the nozzle support for machining. Refer to Figure 903, Figure 904, and as follows:
(1)If necessary, make the machining fixture.
(2)Put the machining fixture on a clean machining table or an equivalent clean and flat surface.
(3)Adjust the position of the machining fixture to get surface FA flat to 0.001 inch (0.02 mm) or less as follows:
(a)If necessary, put C10-155  shims between surface FA of the machining fixture and the surface of the machining table to get surface FA of the machining fixture flat to 0.001 inch (0.02 mm) FIR or less.
(b)Make sure that the runout of surface FS is 0.001 inch (0.02 mm) FIR or less.
(4)Adjust the position of the machining fixture to get surface FB concentric to the machining table axis to 0.002 inch (0.05 mm) or less.
(5)Attach the machining fixture to the machining table with clamps as follows:
(a)Engage the clamps to attach the machining fixture to the machining table.
(6)Measure the runout of surface FS and the concentricity of surface FB of the machining fixture as follows:
(a)Make sure that the machining fixture agrees with the limits specified in Subtask 72-51-01-350-032 (paragraph 4.A.(3) and paragraph 4.A.(4)).
(7)If necessary, do Subtask 72-51-01-350-032 (paragraph 4.A.(3) thru paragraph 4.A.(6)) again to adjust the machining fixture to the correct position.
(8)Put the nozzle support on the machining fixture. Refer to Figure 901, Figure 904, and as follows:
(a)Put the nozzle support on the machining fixture with surface A (datum A) of the nozzle support down on surface FS of the machining fixture.
(9)Adjust the position of the nozzle support to get surface A flat to 0.002 inch (0.05 mm) or less. Refer to Figure 901, Figure 904, and as follows:
(a)If necessary, put C10-155  shims between surface A (datum A) of the nozzle support and surface FS of the machining fixture.
(10)Adjust the position of the nozzle support to get the diameter of surface B (datum B) to agree with the limits. Refer to Figure 901, Figure 904, and as follows:
(a)If necessary, put C10-155  shims between surface B (datum B) of the nozzle support and surface FB of the machining fixture.
(11)Attach the nozzle support to the machining fixture with a minimum of six clamps that are equally spaced. Refer to Figure 903.
Subtask 72-51-01-350-033
B.Set-up the nozzle support for heat treatment as follows:
(1)Put Hastelloy X shims (shims) on top of a graphite plate as follows:
(a)Put the shims on top of a graphite plate to make sure that the nozzle support will not touch the graphite plate directly during the heat treatment.
CAUTION:
MAKE SURE THAT THE NOZZLE SUPPORT DOES NOT TOUCH THE GRAPHITE PLATE DIRECTLY. IF IT TOUCHES THE GRAPHITE AT THE HEAT TREATMENT TEMPERATURES, DAMAGE TO NOZZLE SUPPORT CAN OCCUR.
(2)Put the nozzle support on the shims that are equally spaced on the top surface of the graphite plate.
(3)For the quantity and placement requirements of the load thermocouples, refer to TASK 70-44-03-370-004 (FURNACE HEAT TREATMENT) .
5 . Procedure.
Subtask 72-51-01-110-016
A.If necessary, clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-350-034
B.Record the nozzle support marking information on the surface of the aft flange as follows:
(1)Make sure to record the marking the same as it is.
Subtask 72-51-01-350-035
C.Remove the shank nuts from the nozzle support. Refer to TASK 72-51-01-300-801 (72-51-01, REPAIR 001).
Subtask 72-51-01-350-119
D.For part numbers 2407M46G06   and 2407M46G08   , remove the hard coating from the nozzle support. Refer to TASK 72-51-01-300-810 (72-51-01, REPAIR 011).
Subtask 72-51-01-370-012
E.Optional Procedure. Alternative Procedure Available. If necessary heat-treat the nozzle support. Refer to TASK 70-44-00-800-010 (HEAT TREATING), TASK 70-44-03-370-004 (FURNACE HEAT TREATMENT) , and as follows:
(1)Set-up the nozzle support for heat treatment. Refer to Subtask 72-51-01-350-033 (paragraph 4.B.).
(2)Do a solution heat treatment of the nozzle support as follows:
(a)Use a vacuum of 1.0 micron of mercury or less.
(b)Increase the temperature of the nozzle support to a temperature range of 1835 to 1885°F (1002 to 1029°C) and keep the temperature for 20-30 minutes.
(c)Decrease the temperature of the nozzle support to 1000°F (538°C) in less than 30 minutes.
Subtask 72-51-01-370-013
E.A.Optional Procedure. Alternative Procedure. Heat-treat the nozzle support. Refer to TASK 70-44-00-800-010 (HEAT TREATING), TASK 70-44-03-370-004 (FURNACE HEAT TREATMENT) , and as follows:
(1)Set-up the nozzle support for heat treatment. Refer to Subtask 72-51-01-350-033 (paragraph 4.B.).
(2)Do a solution heat treatment of the nozzle support as follows:
(a)Use a vacuum of 1.0 micron of mercury or less.
(b)Increase the temperature of the nozzle support to a range of 1700 to 1750ºF (927 to 954ºC) and as follows:
1Keep this temperature for 10-15 minutes or until the vacuum rate gets back to a vacuum pressure of 5.0 X 10-4 mm Hg or less (6.7 x 10-4 millibar).
(c)Increase the temperature of the nozzle support to a temperature range of 1875 to 1925ºF (1024 to 1052ºC) at a rate of 20 to 25ºF (11 to 14ºC) for each minute and as follows:
1Keep this temperature for a maximum of 3-5 minutes.
NOTE:
The accumulated time more than 1900ºF (1038ºC) must be 30 minutes or less.
CAUTION:
DO NOT KEEP THE TEMPERATURE OF THE NOZZLE SUPPORT AT MORE THAN 1900ºF (1038ºC) FOR MORE THAN 30 MINUTES (TOTAL ACCUMULATED TIME) OR DAMAGE TO THE HONEYCOMB CAN OCCUR.
(d)Decrease the temperature of the nozzle support to a temperature range of 1750 to 1800ºF (954 to 982ºC) at a minimum rate of 20ºF (11ºC) for each minute and as follows:
1Keep this temperature for 10-15 minutes.
(e)Decrease the temperature of the nozzle support to 975 to 1025ºF (524 to 552ºC) in 30 minutes or less.
NOTE:
The rate of temperature decreases less than 1000ºF (538ºC) is not important.
(f)Remove the nozzle support from the furnace.
Subtask 72-51-01-320-007
F.Optional Procedure. Remove the 21 pins from the nozzle support outer flange. Refer to TASK 70-00-03-800-004 (MACHINING DATA), Figure 901, and Figure 902.
NOTE:
Removed pins can be installed again in Subtask 72-51-01-350-048 (paragraph 5.AH.(1)A.) , if they agree with the requirements specified in Figure 905.
Subtask 72-51-01-320-008
G.Alternative Procedure Available. Machine the cracked area of the nozzle support to the in-process dimension. Refer to TASK 70-00-03-800-004 (MACHINING DATA), Subtask 72-51-01-220-064 (paragraph 3.A.), Figure 901, Figure 902, and as follows:
(1)Set-up the nozzle support for machining. Refer to Subtask 72-51-01-350-032 (paragraph 4.A.).
(2)Machine the outer flange diameter.
(3)If cracks are more than the minimum in-process dimension (diameter M), you can prepare them for welding with a manual blending/grinding process. Refer to TASK 70-41-00-310-001 (WELDING AND BRAZING PRACTICES).
(4)If necessary, machine pin holes to remove remaining wall thickness between machined outer flange diameter and pin hole to prepare them for welding process.
Subtask 72-51-01-350-036
(5)Blend the nozzle support to break all sharp edges on the machined surfaces to 0.005-0.015 inch (0.13-0.38 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-51-01-220-065
(6)Do an inspection for smooth transition from non-machined surface to machined surface.
Subtask 72-51-01-350-037
(7)Remove the nozzle support from the machining fixture.
Subtask 72-51-01-350-038
G.A.Alternative Procedure. For low number of cracks, blend to remove cracks in the outer flange diameter to prepare them for welding process. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) and as follows:
(1)If cracks are more than the minimum in-process dimension (diameter M), you can prepare them for welding.
Subtask 72-51-01-110-017
CAUTION:
MAKE SURE THAT TOO MUCH ABRASIVE BLASTING DOES NOT OPERATE THE EQUIPMENT AND THAT THE ABRASIVE JET IS NOT LOCALIZED ON THE SAME AREA. DO NOT DWELL FOR MORE THAN 2 SECONDS. MAKE SURE THAT YOU DO THE BLASTING PROCESS BY SWEEPING OBLIQUELY ALONG THE FULL SURFACE OF THE NOZZLE SUPPORT. DAMAGE TO THE NOZZLE SUPPORT CAN OCCUR.
H.Optional Procedure. Clean the nozzle support repair area. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING), TASK 70-21-04-120-001 (CLEANING METHOD NO. 4 - DRY ABRASIVE BLAST CLEANING), and as follows.
(1)Apply masking to the honeycomb and inducer passages.
(2)Do the abrasive blast cleaning to the nozzle support with C04-113  220 mesh abrasive compound.
Subtask 72-51-01-110-018
I.Clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-110-019
J.Etch the nozzle support machined areas. Refer to TASK 70-24-00-110-033 (ETCHING PROCEDURES FOR FLUORESCENT-PENETRANT INSPECTION), TASK 70-24-01-110-034 (SWAB ETCHING PROCEDURE), and as follows:
(1)Use Class C etchant.
Subtask 72-51-01-230-007
K.Alternative Procedure Available. Do an inspection of the nozzle support repair area. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION), and as follows:
(1)Use Class A penetrant.
(2)Indications 0.030 inch (0.76 mm) or less are not interpretable and are permitted.
(3)Non-linear indications 0.060 inch (1.52 mm) or less with a minimum distance of 0.15 inch (3.9 mm) between indications are permitted.
(4)Linear indications more than 0.030 inch (0.76 mm) are not permitted.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
(5)Through indications are not permitted.
(6)Microshrinkage must agree with GEAE Photo Standard 8311253, Class 30.
Subtask 72-51-01-230-008
K.A.Alternative Procedure. Do an inspection of the nozzle support repair area. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION), and as follows:
(1)Use Class A penetrant.
(2)Indications 0.030 inch (0.76 mm) or less are not interpretable and are permitted.
(3)Non-linear indications 0.060 inch (1.52 mm) or less with a minimum distance of 0.15 inch (3.9 mm) between indications are permitted.
(4)Linear indications more than 0.030 inch (0.76 mm) are not permitted.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
(5)Through indications are not permitted.
(6)Microshrinkage must agree with GEAE Photo Standard 8311253, Class 30.
Subtask 72-51-01-310-005
L.If you removed the pin hole wall in Subtask 72-51-01-320-008 (paragraph 5.G.(4)), weld the nozzle support to close remaining pin holes. Refer to TASK 70-41-00-310-001 (WELDING AND BRAZING PRACTICES) and as follows:
(1)Use C06-037  GTD 222 weld wire.
(2)Blend the nozzle support to remove unwanted weld material from the outer flange. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-51-01-310-006
M.Weld the nozzle support outer flange. Refer to TASK 70-41-00-310-001 (WELDING AND BRAZING PRACTICES) and as follows:
(1)Use C06-037  GTD 222 weld wire.
Subtask 72-51-01-320-009
N.Optional Procedure. Machine the nozzle support to the finish dimensions. Refer to TASK 70-00-03-800-004 (MACHINING DATA), Figure 901, Figure 902, and as follows:
(1)Set-up the nozzle support for machining. Refer to Subtask 72-51-01-350-032 (paragraph 4.A.).
(2)Machine the outer flange to the initial contour and as follows:
(a)The transition between welded and non-welded areas must be flush to a maximum of 0.002 inch (0.05 mm).
(b)For part number 2407M46G08   , machine the outer flange chamfer. Refer to Figure 902.
Subtask 72-51-01-350-039
(3)Blend the nozzle support to break all sharp edges on the machined surfaces to 0.005-0.015 inch (0.13-0.38 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
(4)If necessary, open the 21 new pin holes again and one offset. Refer to Figure 902.
(5)Remove the nozzle support from the machining fixture.
Subtask 72-51-01-110-020
O.If you machined the nozzle support, clean it. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-110-021
P.If you machined the nozzle support, etch it. Refer to TASK 70-24-00-110-033 (ETCHING PROCEDURES FOR FLUORESCENT-PENETRANT INSPECTION), TASK 70-24-01-110-034 (SWAB ETCHING PROCEDURE), and as follows:
(1)Use Class C etchant.
Subtask 72-51-01-230-009
Q.Alternative Procedure Available. Do an inspection of the nozzle support repair area. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION), and as follows:
(1)Use Class A penetrant.
(2)Indications 0.030 inch (0.76 mm) or less are not interpretable and are permitted.
(3)Non-linear indications 0.060 inch (1.52 mm) or less with a minimum distance of 0.15 inch (3.9 mm) between indications are permitted.
(4)Linear indications more than 0.030 inch (0.76 mm) are not permitted.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
(5)Through indications are not permitted.
(6)Microshrinkage must agree with GEAE Photo Standard 8311253, Class 30.
Subtask 72-51-01-230-010
Q.A.Alternative Procedure. Do an inspection of the nozzle support repair area. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION), and as follows:
(1)Use Class A penetrant.
(2)Indications 0.030 inch (0.76 mm) or less are not interpretable and are permitted.
(3)Non-linear indications 0.060 inch (1.52 mm) or less with a minimum distance of 0.15 inch (3.9 mm) between indications are permitted.
(4)Linear indications more than 0.030 inch (0.76 mm) are not permitted.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
(5)Through indications are not permitted.
(6)Microshrinkage must agree with GEAE Photo Standard 8311253, Class 30.
Subtask 72-51-01-260-001
R.Do an inspection of the nozzle support in the weld repaired area only. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-05-260-001 (RADIOGRAPHIC INSPECTION), and as follows:
(1)Indications 0.030 inch (0.76 mm) or less are not interpretable and are permitted.
(2)Non-linear indications 0.060 inch (1.52 mm) or less with a minimum distance of 0.15 inch (3.9 mm) between indications are permitted.
(3)Linear indications more than 0.030 inch (0.76 mm) are not permitted.
(4)Deleted.
(5)Deleted.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
Subtask 72-51-01-350-040
S.If necessary, do Subtask 72-51-01-310-006 (paragraph 5.L.) thru Subtask 72-51-01-260-001 (paragraph 5.Q.), again until you remove all the rejected indications from the nozzle support repair area.
Subtask 72-51-01-110-022
T.If necessary, clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-370-007
U.Alternative Procedure Available. Heat-treat the nozzle support. Refer to TASK 70-44-00-800-010 (HEAT TREATING), TASK 70-44-03-370-004 (FURNACE HEAT TREATMENT), and as follows:
(1)Set-up the nozzle support for heat treatment. Refer to Subtask 72-51-01-350-033 (paragraph 4.B.).
(2)Do a solution heat treatment of the nozzle support as follows:
(a)Use a vacuum of 1.0 micron of mercury or less.
(b)Increase the temperature of the nozzle support to a temperature range of 1835 to 1885°F (1002 to 1029°C) and keep the temperature for 20-30 minutes.
(c)Decrease the temperature of the nozzle support to 1000°F (538°C) in less than 30 minutes.
Subtask 72-51-01-370-008
U.A.Alternative Procedure. Heat-treat the nozzle support. Refer to TASK 70-44-00-800-010 (HEAT TREATING), TASK 70-44-03-370-004 (FURNACE HEAT TREATMENT) , and as follows:
(1)Set-up the nozzle support for heat treatment. Refer to Subtask 72-51-01-350-033 (paragraph 4.B.).
(2)Do a solution heat treatment of the nozzle support as follows:
(a)Use a vacuum of 1.0 micron of mercury or less.
(b)Increase the temperature of the nozzle support to a range of 1700 to 1750ºF (927 to 954ºC) and as follows:
1Keep this temperature for 10-15 minutes or until the vacuum rate gets back to a vacuum pressure of 5.0 X 10-4 mm Hg or less (6.7x10-4 millibar).
(c)Increase the temperature of the nozzle support to a temperature range of 1875 to 1925ºF (1024 to 1052ºC) at a rate of 20 to 25ºF (11 to 14ºC) for each minute and as follows:
1Keep this temperature for a maximum of 3-5 minutes.
NOTE:
The accumulated time more than 1900ºF (1038ºC) must be 30 minutes or less.
CAUTION:
DO NOT KEEP THE TEMPERATURE OF THE NOZZLE SUPPORT AT MORE THAN 1900ºF (1038ºC) FOR MORE THAN 30 MINUTES (TOTAL ACCUMULATED TIME) OR DAMAGE TO THE HONEYCOMB CAN OCCUR.
(d)Decrease the temperature of the nozzle support to a temperature range of 1750 to 1800ºF (954 to 982ºC) at a minimum rate of 20ºF (11ºC) for each minute and as follows:
1Keep this temperature for 10-15 minutes.
(e)Decrease the temperature of the nozzle support to 975 to 1025ºF (524 to 552ºC) in 30 minutes or less.
NOTE:
The rate of temperature decrease less than 1000ºF (538ºC) is not important.
(f)Remove the nozzle support from the furnace.
Subtask 72-51-01-370-009
V.Heat-treat the nozzle support. Refer to TASK 70-44-00-800-010 (HEAT TREATING), TASK 70-44-03-370-004 (FURNACE HEAT TREATMENT), and as follows:
(1)Set-up the nozzle support for heat treatment. Refer to Subtask 72-51-01-350-033 (paragraph 4.B.).
(2)Do an age heat treatment to the nozzle support as follows:
(a)Heat-treat the nozzle support at 1450 to 1500°F (788 to 816°C) for 8 hours.
(b)Decrease the temperature of the nozzle support to 1000°F (538°C) at a rate not less than 25°F (14°C) per minute.
(c)Decrease the nozzle support temperature to room temperature.
(d)Remove the nozzle support from the furnace.
Subtask 72-51-01-310-007
W.Do a visual inspection in the nozzle support brazed areas. Refer to TASK 70-41-00-310-001 (WELDING AND BRAZING PRACTICES), TASK 70-41-03-310-004 (HIGH TEMPERATURE FURNACE BRAZE), and as follows:
(1)The diameter or length of one void and non-bonded areas must not be more than the 0.08 inch (2.0 mm).
(2)There must not be more than three voids or non-bonded areas in a section with a length of 1.0 inch (25 mm) of braze bond area.
(3)Irregular surface porosity is permitted. Indications 0.015 inch (0.38 mm) or less are not interpretable.
(4)Through voids are not permitted.
Subtask 72-51-01-220-066
X.Alternative Procedure Available. Do an inspection of the honeycomb. Refer to TASK 70-33-00-999-001 (SPECIAL INSPECTION PROCEDURES), TASK 70-33-02-220-005 (CAPILLARY INSPECTION OF OPEN FACE HONEYCOMB STRUCTURES), and as follows:
(1)You must fully bond the honeycomb core to its backing surface in 80 percent of the total contact area.
(2)Unbonded areas cannot contain more than 10 totally unbonded adjacent cells circumferentially by five totally unbonded adjacent cells axially.
(3)Honeycomb core node bond is not interpretable.
(4)Unbonded areas must be separated by a minimum of five adjacent bonded cells.
(5)An unbonded area cannot include open cells, partial cells, or splices.
Subtask 72-51-01-220-067
X.A.Alternative Procedure. Do an inspection of the honeycomb with a video microscope under a minimum of 10X magnification. Refer to Subtask 72-51-01-310-007 (paragraph 5.W.(1) thru paragraph 5.W.(4)) for the inspection limits.
Subtask 72-51-01-350-041
Y.If you did not machine the nozzle support per Subtask 72-51-01-320-009 (paragraph 5.N), machine the nozzle support to the finish dimensions. Refer to TASK 70-00-03-800-004 (MACHINING DATA), Figure 901, Figure 902, and as follows:
(1)Set-up the nozzle support for machining. Refer to Subtask 72-51-01-350-032 (paragraph 4.A.).
(2)Machine the outer flange to the initial contour and as follows:
(a)The transition between welded and non-welded areas must be flush to a maximum of 0.002 inch (0.05 mm).
(b)For part number 2407M46G08   , machine the outer flange chamfer. Refer to Figure 902.
Subtask 72-51-01-350-042
(3)Blend the nozzle support to break all sharp edges on the machined surfaces to 0.005-0.015 inch (0.13-0.38 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-51-01-220-068
(4)Deleted.
Subtask 72-51-01-350-043
(5)If necessary, open the 21 new pin holes and one offset. Refer to Figure 902.
(6)Remove the nozzle support from the machining fixture.
Subtask 72-51-01-320-010
Z.Optional Procedure. Do a dimensional inspection (runout and dimensions), and if necessary, do a skim cut in diameter AA, diameter BA, diameter Z, and/or surface G to the minimum serviceable limits. Refer to TASK 70-00-03-800-004 (MACHINING DATA), Figure 902, and as follows:
(1)Set-up the nozzle support for machining. Refer to Subtask 72-51-01-350-032 (paragraph 4.A.).
(2)Check the runout and dimensions for diameters AA, BA, and Z.
(3)Check dimension G.
(4)Machine the diameters AA, BA, Z, and surface G as necessary.
NOTE:
If the skim cut in the surface G is performed, the parallelism in surface G must be inspected. Refer to Figure 902.
NOTE:
Check the wall thickness (dimension T and dimension H). Refer to Figure 902.
NOTE:
If runout for diameter Z is not met, alternative limit for radius and profile is applicable. Profile must be measured with CMM. Refer to Figure 902.
Subtask 72-51-01-350-062
(5)Blend the nozzle support to break all sharp edges and have a smooth transition to the inner radius. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-51-01-220-079
(6)Do an inspection for smooth transition from non-machined surface to machined surface.
Subtask 72-51-01-350-063
(7)Remove the nozzle support from the machining fixture.
Subtask 72-51-01-110-023
AA.If necessary, clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-110-024
AB.If you performed Subtask 72-51-01-350-041 (paragraph 5.Y) and/or Subtask 72-51-01-320-010 (paragraph 5.Z), etch the nozzle support machined areas. Refer to TASK 70-24-00-110-033 (ETCHING PROCEDURES FOR FLUORESCENT-PENETRANT INSPECTION), TASK 70-24-01-110-034 (SWAB ETCHING PROCEDURE), and as follows:
(1)Use Class C etchant.
Subtask 72-51-01-230-011
AC.Do an inspection of the nozzle support. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION), and as follows:
(1)Use Class A penetrant.
(2)Indications 0.030 inch (0.76 mm) or less are not interpretable and are permitted.
(3)Non-linear indications 0.060 inch (1.52 mm) or less with a minimum distance of 0.15 inch (3.9 mm) between indications are permitted.
(4)Linear indications more than 0.030 inch (0.76 mm) are not permitted.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
(5)Through indications are not permitted.
(6)Microshrinkage must agree with GEAE Photo Standard 8311253, Class 30.
Subtask 72-51-01-350-044
AD.If necessary, do Subtask 72-51-01-310-006 (paragraph 5.M.) thru Subtask 72-51-01-230-011 (paragraph 5.AC.) again until you remove all the rejected indications from the nozzle support repair area.
Subtask 72-51-01-110-025
AE.Clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-220-069
AF.Deleted.
Subtask 72-51-01-350-045
AG.Deleted.
Subtask 72-51-01-230-012
AH.Deleted.
Subtask 72-51-01-350-046
AI.If you performed Subtask 72-51-01-370-012 (paragraph 5.E.), install the 21 pins in the nozzle support outer flange. Refer to Figure 901, Figure 902, and as follows:
Subtask 72-51-01-350-047
(1)Alternative Procedure Available. Install the pin you removed in Subtask 72-51-01-370-012 (paragraph 5.E.), if they agree with the requirements specified in Figure 905, and do as follows:
Subtask 72-51-01-230-036
(a)Do an inspection of the pins. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION), and as follows:
1Use Class A penetrant.
2Indications less than 0.030 inch (0.76 mm) or less are not interpretable and are permitted.
3Non-linear indications 0.060 inch (1.52 mm) or less with a minimum distance of 0.50 inch (12.7 mm) between indications are permitted.
4Linear indications more than 0.060 inch (1.52 mm) are not permitted.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
5Make sure the pin agrees with the necessary interference.
6You must assemble the pin into the hole with a dimensional interference fit of 0.0002-0.0011 inch (0.006-0.027 mm).
Subtask 72-51-01-350-048
(1).B.Alternative Procedure. Get the replacement pins. Refer to paragraph 2.E., SPD Information, and as follows:
(a)Make sure the pin agrees with the necessary interference.
(b)You must assemble the pin into the hole with a dimensional interference fit of 0.0002-0.0011 inch (0.006-0.027 mm).
Subtask 72-51-01-350-049
(1).C.Alternative Procedure. Make the replacement pins. Refer to paragraph 2.E.(1), Figure 905 and as follows:
(a)If the pins are made according to AMS 5712, do a heat treatment to ensure mechanical properties. Refer to TASK 70-44-00-800-010 (HEAT TREATING), TASK 70-44-03-370-004 (FURNACE HEAT TREATMENT) , and as follows:
1Do a solution heat treatment of the pins as follows:
aIncrease the temperature of the pin to a temperature of 1950°F (1066°C) and keep the temperature for 30 minutes.
bDecrease the temperature of the pin to 800°F (427°C).
2Do an age heat treatment of the pin as follows:
aIncrease the temperature of the pin to a temperature of 1400°F (760°C) and keep the temperature for 16 hours.
bDecrease the temperature of the pin to 800°F (427°C).
(b)Do an inspection of the pins. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION), and as follows:
1Use Class A penetrant.
2Indications 0.030 inch (0.76 mm) or less are not interpretable and are permitted.
3Non-linear indications 0.060 inch (1.52 mm) or less with a minimum distance of 0.50 inch (12.7 mm) between indications are permitted.
4Linear indications more than 0.060 inch (1.52 mm) are not permitted.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
(c)Make sure the pin agrees with necessary interference.
(d)You must assemble the pin into the hole with a diametrical interference fit of 0.0002-0.0011 inch (0.006-0.027 mm).
Subtask 72-51-01-350-050
(2)Chill the pin in dry ice to decrease the temperature of the pin for a minimum of 15 minutes.
(3)Put the pin in the hole.
(4)Lightly tap each pin with a plastic rod and mallet until the pins are flush or below the surface of the nozzle support outer flange.
(5)Let the pin get the same temperature as the nozzle support.
(6)Use a criss-cross method.
(7)Do an inspection of the pins in the nozzle support outer flange. Refer to Figure 901, Figure 902, and as follows:
(a)Make sure that the pins are flush or below the surface of the nozzle support outer flange.
Subtask 72-51-01-350-120
AJ.For part numbers 2407M46G06   and 2407M46G08   , apply the hard coating from the nozzle support. Refer to TASK 72-51-01-300-810 (72-51-01, REPAIR 011).
Subtask 72-51-01-220-070
AK.Deleted.
Subtask 72-51-01-350-051
AL.Put a mark again in the nozzle support. Refer to TASK 70-16-00-350-001 (MARKING PRACTICES), TASK 70-16-08-350-001 (DOT PEEN MARKING FOR OPTICAL CHARACTER RECOGNITION), and as follows:
(1)Use the marking information that you recorded in Subtask 72-51-01-350-034 (paragraph 5.B.) as follows:
(a)Make sure to use the same mark that the nozzle support initially had.
(2)Put a mark with the part number, serial number, and manufacturer identification number on the nozzle support marking area. Refer to Figure 902 and as follows:
(a)Use Method 2, OCR-DM3.
Subtask 72-51-01-350-052
AM.Install the shank nuts in the nozzle support. Refer to TASK 72-51-01-300-801 (72-51-01, REPAIR 001).
Subtask 72-51-01-220-121
AN.Do an inspection of the nozzle support. Refer to TASK 72-51-01-200-801 (72-51-01, INSPECTION 001) and Figure 902.
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Figure 901   High Pressure Turbine Stage 1 Nozzle Support
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Figure 902   (Sheet 1 ) High Pressure Turbine Stage 1 Nozzle Support - Dimensional Information
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Figure 902   (Sheet 2 ) High Pressure Turbine Stage 1 Nozzle Support - Dimensional Information
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Figure 902   (Sheet 3 ) High Pressure Turbine Stage 1 Nozzle Support - Dimensional Information
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Figure 902   (Sheet 4 ) High Pressure Turbine Stage 1 Nozzle Support - Dimensional Information
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Figure 902   (Sheet 5 ) High Pressure Turbine Stage 1 Nozzle Support - Dimensional Information
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Figure 902   (Sheet 6 ) High Pressure Turbine Stage 1 Nozzle Support - Dimensional Information
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Figure 903   (Sheet 1 ) Machining Fixture
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Figure 903   (Sheet 2 ) Machining Fixture
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Figure 904   Machining Fixture - Setup Information
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Figure 905   (Sheet 1 ) Pin - Dimensional Information
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Figure 905   (Sheet 2 ) Pin - Dimensional Information