CONCAVE AIRFOIL HOLES, SOME CONFIGURATIONS
B
G-M56-SM-1278(1)-01-B TIP AREA 0.50 (12.7)
TOP SLOT (NO. 10 T/E SLOT TO NO. 17 CONCAVE GILL HOLE FOR R125 BLADE AND NO. 13
AREA A CONCAVE GILL HOLETOP FOR DSR80 BLADE)
RIB TOP0.020 (0.51)
GILL
NOMINAL DEPTH AREA B
HOLE SEE E
0.030 (0.76)
NOMINAL DEPTH 0.010 (0.25)
NOMINAL DEPTH ROOT FILLET 0.100
AREA C (2.54)
CAVITY RIB 0.50 (12.7)
G-M56-MM-0257-(1)-00-C SEAL LIP (FIRST 5 T/E SLOTS TO THE FIRST 8 CONCAVE GILL HOLES FOR R125 D BLADE AND TO THE FIRST 6 CONCAVE GILL HOLES FOR THE DSR80 BLADE)
NOTE: DIMENSIONS ARE IN INCHES WITH MILLIMETERS IN PARENTHESES
1 NOTCHES PRESENT ON TWO BLADES HIGH PRESSURE TURBINE BLADE
90 APART
GMM-1110719-00-AHPT Rotor and 1st-Stage LPT Nozzle Guide Vanes Borescope Inspection Figure 607 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
16 NARROW TRAILING EDGE AIR SLOTS CONFIGURATION PART NUMBER: 9997M23 MATERIAL: R125
OUTER PLATFORM
14 NARROW,
1 WIDE TRAILING EDGE
AIR SLOTS CONFIGURATION
PART NUMBER: 9530M95
MATERIAL: DSR80
GMM-1110721-00-A
AIR
HPT AFT SEAL (WIGGLE SEAL)
S-M56-MM-0953-(1)-00-C
1ST-STAGE LPT NOZZLE GUIDE VANES
HPT Rotor and 1st-Stage LPT Nozzle Guide Vanes
Borescope Inspection
Figure 607 (Sheet 3)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
HPT Blades and Shrouds and 1st-Stage LPT NGV's - Inspection
___________________________________________________________ S 216-085-C00
(2) Examine the leading or trailing edge of the 1st-stage LPT NGV's (Fig. 607) for cracks, burns or missing material:
NOTE: You can only make an inspection of the areas that you can see
____
through the borescope.
ú (a) Cracks in the trailing edge
1) No maximum limit to the quantity if they are less than
0.6 inch (15.2 mm) in length (1/3 of the chord length) on
all the vanes of the same nozzle segment.
NOTE: A nozzle segment has three vanes.____
2) One crack for each vane is permitted for a maximum of two
vanes of the same nozzle segment if they are more than
0.6 inch (15.2 mm) but less than 1.0 inch (25.4 mm) in
length (1/2 of the chord length).
a) At least one vane for each nozzle segment must be in
the limits of the first step above.
3) A maximum service extension of 100 cycles is permitted if:
a) There is only one crack for each vane that is more than
1.0 inch (25.4 mm) in length on all the vanes of the
same nozzle segment.
b) All other cracks are less than 1.0 inch (25.4 mm) in
length.
ú (b) Cracks in the leading edge
ú 1) No maximum limit to the quantity if they are less than
ú 0.6 inch (15.2 mm) in length (1/3 of the chord length) on
ú all the vanes of the same nozzle segment.
ú 2) One axial crack for each vane is permitted for a maximum of
ú two vanes of the same nozzle segment if they are more than
ú 1.0 inch (25.4 mm) but less than 1.5 inch (38.0 mm) in
ú length (4/5 of the chord length) and less than 0.004 inch
ú (0.1 mm) in width.
ú a) At least one vane for each nozzle segment must be in
ú the limits of the first step above.
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