* * * FOR ALL
TASK 72-51-01-300-808
1 . Weld Repair of the Stage 1 Nozzle Radial Support Interface And/Or Body Surface Outer And/Or Inner Diameter.
A.This procedure gives instructions to repair the high pressure turbine stage 1 nozzle support (nozzle support) by welding cracks, nicks, scratches, wear, and dents on the radial support interface (radial support) and the body surface outer and/or inner diameter (body surface OD and/or ID). 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.
(a)Do an inspection of all body surfaces for:
1Cracks:
Maximum repairable limit:
Any amount.
2Dents:
Maximum repairable limit:
Any amount.
3Nicks and scratches:
Maximum repairable limit:
Any amount.
(b)Do an inspection of the outer flange area for:
6Wear or fretting on the stage 1 nozzle axial and radial support interface:
Maximum repairable limit:
Any amount.
8Cracks on the stage 1 nozzle radial support interface:
Maximum repairable limit:
Any amount in area X.
(c)Do an inspection of the forward flange, combustor flange interface, and aft inner flange for:
1Cracks from boltholes:
Maximum repairable limit:
Any amount.
2Dents:
Maximum repairable limit:
Any amount.
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  
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)
 
--
Hastelloy X 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 004
 
72-51-01
Repair 005
 
72-51-01
Repair 011
 
--
GEAE Photo Standard 8311253, Class 30
D.Expendable Parts. None.
E.SPD Information.
(1)Locally Manufactured SPD. None.
F.Special Solutions. None.
G.Test Specimens. None.
3 . Dimensional Information.
Subtask 72-51-01-220-096
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.
4 . Setup Information.
Subtask 72-51-01-350-082
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 and 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 paragraph 4.A.(3) and paragraph 4.A.(4).
(7)If necessary, do 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 72-51-01-350-083
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 process.
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 THE 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 72-51-01-160-015
A.If necessary, clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-350-084
B.Optional Procedure. Record the nozzle support marking information on the body surface OD as follows:
(1)Make sure that you record the marking the same as it is.
Subtask 72-51-01-350-085
C.Remove the shank nuts from the nozzle support. Refer to TASK 72-51-01-300-801 (72-51-01, REPAIR 001).
Subtask 72-51-01-350-107
D.For part numbers 2407M46G06   and 2407M46G08   , remove the hard coating from the nozzle support. Refer to TASK 72-51-01-300-811 (72-51-01, REPAIR 011).
Subtask 72-51-01-320-012
E.Optional Procedure. Machine the nozzle support outer flange to remove the twenty-one pins. Refer to TASK 70-00-03-800-004 (MACHINING DATA), Figure 901, Figure 902.
NOTE:
Removed pins can be installed again in a subsequent step.
Subtask 72-51-01-370-037
F.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:
Subtask 72-51-01-350-086
(1)Set-up the nozzle support for heat treatment. Refer to Subtask 72-51-01-350-083 (paragraph 4.B.).
Subtask 72-51-01-370-038
(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 72-51-01-370-039
F.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:
Subtask 72-51-01-350-087
(1)Set-up the nozzle support for heat treatment. Refer to Subtask 72-51-01-350-083 (paragraph 4.B.).
Subtask 72-51-01-370-040
(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 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 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 72-51-01-350-088
G.Blend the nozzle support to remove defects from the radial support area X and/or body surface OD and/or ID to prepare them for the welding process. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES), Figure 901, and Figure 902.
NOTE:
If the defect is in area Y, remove fully the braze alloy from the inner side near the repair area. If the defect is a through linear indication in area Y do not grind fully the wall thickness because the cross section of weld joint influences the extent of shrinkage. Keep a minimum of 0.02 inch (0.51 mm) wall thickness at the inner side wall.
(1)Deleted.
(2)Deleted.
Subtask 72-51-01-160-016
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 72-51-01-160-017
I.If necessary, clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-110-035
J.Etch the nozzle support blended 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 72-51-01-230-024
K.Alternative Procedure Available. Do an inspection of the repaired 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 72-51-01-230-025
K.A.Alternative Procedure. Do an inspection of the repaired 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 72-51-01-310-012
L.Weld the blended area. Refer to TASK 70-41-00-310-001 (WELDING AND BRAZING PRACTICES), Figure 901, and as follows:
NOTE:
If the defect is in area Y use low heat input welding. Apply groove welding from outer side of body in case of through linear indication.
(1)Use C06-037  GTD 222 weld wire.
Subtask 72-51-01-350-089
M.Blend the nozzle support welded areas to the finish dimensions. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES), Figure 901, Figure 902, and as follows:
NOTE:
If area Y has been welded, blend the weld beam to get a flat surface. Do not blend to the inicial contour.
(1)Blend the welded areas 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).
Subtask 72-51-01-160-018
N.Optional Procedure. Clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-260-003
O.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.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
Subtask 72-51-01-110-036
P.Etch the nozzle support blended 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 72-51-01-230-026
Q.Alternative Procedure Available. Do an inspection of the nozzle support repair areas. 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 72-51-01-230-027
Q.A.Alternative Procedure. Do an inspection of the nozzle support repair areas. 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 72-51-01-260-002
R.Deleted.
Subtask 72-51-01-350-090
S.If necessary, do Subtask 72-51-01-310-012 (paragraph 5.K.) thru Subtask 72-51-01-260-002 (paragraph 5.P.), again until you remove all the rejected indications from the nozzle support repair area.
Subtask 72-51-01-160-019
T.If necessary, clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-310-013
U.If necessary, re-braze the inner side near the repair area (area Y). Refer to TASK 72-51-01-300-805 (72-51-01, REPAIR 005) and Figure 901.
Subtask 72-51-01-370-041
V.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:
Subtask 72-51-01-350-091
(1)Set-up the nozzle support for heat treatment. Refer to Subtask 72-51-01-350-083 (paragraph 4.B.).
Subtask 72-51-01-370-042
(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 72-51-01-370-043
V.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:
Subtask 72-51-01-350-092
(1)Set-up the nozzle support for heat treatment. Refer to Subtask 72-51-01-350-083 (paragraph 4.B.).
Subtask 72-51-01-370-044
(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 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 72-51-01-370-045
W.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:
Subtask 72-51-01-350-093
(1)Set-up the nozzle support for heat treatment. Refer to Subtask 72-51-01-350-083 (paragraph 4.B.).
Subtask 72-51-01-370-046
(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 (13.89°C) per minute.
(c)Decrease the nozzle support temperature to room temperature.
(d)Remove the nozzle support from the furnace.
Subtask 72-51-01-220-097
X.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 72-51-01-220-098
Y.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 72-51-01-220-099
Y.A.Alternative Procedure. Do an inspection of the honeycomb with a video microscope with a minimum of 10X magnification. Refer to Subtask 72-51-01-220-098 (paragraph 5.V.(1)) thru paragraph 5.V.(4) for the inspection limits.
Subtask 72-51-01-220-108
Z.Do an inspection of the nozzle support. Refer to TASK 72-51-01-200-801 (72-51-01, INSPECTION 001) and Figure 902.
Subtask 72-51-01-320-013
AA.Optional Procedure. Machine the nozzle support diameter BA to minimum serviceable limits. Refer to TASK 70-00-03-800-004 (MACHINING DATA), Figure 902, and as follows:
Subtask 72-51-01-350-094
(1)Set-up the nozzle support for machining. Refer to Subtask 72-51-01-350-082 (paragraph 4.A.).
Subtask 72-51-01-320-014
(2)Machine diameter BA.
Subtask 72-51-01-350-095
(3)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 72-51-01-220-100
(4)Do an inspection of the nozzle support for smooth transition from non-machined surface to machined surface.
(5)Remove the nozzle support from the machining fixture.
Subtask 72-51-01-160-020
AB.If necessary, clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-110-037
AC.If necessary, 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 72-51-01-230-028
AD.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 72-51-01-350-096
AE.If necessary, do Subtask 72-51-01-310-012 (paragraph 5.K.) thru Subtask 72-51-01-230-028 (paragraph 5.Z.) again, until you remove all the rejected indications from the nozzle support repair area.
Subtask 72-51-01-160-021
AF.Clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-220-101
AG.Deleted.
Subtask 72-51-01-350-097
AH.If necessary, make the pins. Refer to TASK 72-51-01-300-804 (72-51-01, REPAIR 004).
Subtask 72-51-01-230-029
AI.If necessary, 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:
(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 0.50 inch (12.7 mm) between indications are permitted.
(4)Linear 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.
Subtask 72-51-01-350-098
AJ.If necessary, install the 21 pins that you removed in Subtask 72-51-01-320-012 (paragraph 5.D.) or install new pins in the nozzle support outer flange. Refer to TASK 72-51-01-300-804 (72-51-01, REPAIR 004).
Subtask 72-51-01-220-102
AK.If necessary, do an inspection of the pins in the nozzle support repair area. Refer to Figure 901, Figure 902, and as follows:
(1)Make sure that the pins are flush or below surface JA of the nozzle support outer flange.
Subtask 72-51-01-350-099
AL.Optional Procedure. 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 72-51-01-350-084 (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 serial number, manufacturer identification number, and the TOP sign on the nozzle support marking area, and as follows:
(a)Use Method 2, OCR-DM3.
Subtask 72-51-01-350-108
AM.For part numbers 2407M46G06   and 2407M46G08   , apply the hard coating from the nozzle support. Refer to TASK 72-51-01-300-811 (72-51-01, REPAIR 011).
Subtask 72-51-01-350-100
AN.Install the shank nuts in the nozzle support. Refer to TASK 72-51-01-300-801 (72-51-01, REPAIR 001).
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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 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