(a)
Apply a light layer of graphite grease (CP2101) on the borescope plug threads and the mating surfaces.
(b)
Install in the borescope ports.
(c)
Tighten the plugs to 57-63 pound-inches (6.4-7.1 Newton meters).
(d)
Put a lockwire on the plug.
(8)
Install the turbine exhaust sleeve (AMM 78-11-01/401).
(9)
Do the procedure to put the airplane back to its usual condition.
S 416-083-C00
S 846-073-C00
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú C01 Page 680U ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Axial Preload (4th Stage) - Inspection
______________________________________
TASK 72-00-00-726-056-C00
11. Axial Preload (4th Stage) - Inspection
______________________________________
A. References
(1) AMM 78-11-01/401, Turbine Exhaust Sleeve
B. Access
(1) Location Zones
506 Left Engine
606 Right Engine
C. Do the Inspection for Axial Preload (4th Stage).
S 016-084-C00
(1)
Remove the turbine exhaust sleeve (AMM 78-11-01/401).
S 216-057-C00
(2)
Examine 4th Stage Blades for Axial Preload (Fig. 608).
(a) In a quadrant, separate two tip shrouds by hand, but do not unlatch the tip shroud interlocks.
NOTE: You must separate two tip shrouds in each quadrant
____ to check for axial preload. With your hands, push one blade as you pull the other to separate the tip shroud interlocks.
(b) Release the blades and do a check of the clearance between the tip shroud interlocks. 1) The clearance must be zero between the tip shroud
interlocks.
2) If the clearance is not zero, you must perform the following inspection every 25 cycles or 50 hours: Low Pressure Turbine (LPT) Rotor Blade (4th Stage) Tip Shroud Interlock (AMM 72-00-00/601).
(c) Do the axial preload check again for two tip shrouds in each of the other three quadrants.
S 416-084-C00
(3) Install the turbine exhaust sleeve (AMM 78-11-01/401).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-00-00
ALL ú ú C01 Page 680V ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
LPT Nozzle Guide Vanes (2nd thru 4th Stage) - Inspection
________________________________________________________
TASK 72-00-00-726-058-C00
12. LPT Nozzle Guide Vanes (2nd thru 4th Stage) - Inspection
________________________________________________________
A. References
(1)
AMM 72-54-00/801, Low Pressure Turbine
(2)
AMM 73-11-02/601, Fuel Filter Cartridge
B. Access
(1) Location Zones
506 Left Engine
606 Right Engine
C. Do the Inspection of the LPT Nozzle Guide Vanes (2nd thru 4th Stage).
S 846-059-C00
(1)
If not already done, do the procedure: Prepare for the Borescope Inspection.
S 016-060-C00
(2)
Remove S20, S21, and S22 borescope plugs from along the turbine case at the 5 o'clock position (Fig. 608).
NOTE: On engines with a 9 prope EGT, the borescope port, S20 is
____
found at the 3 o'clock position.
S 296-061-C00
(3)
Put the rigid borescope, with a 90° right angle viewer and 60° field of vision, in the borescope port.
S 216-088-C00
(4)
Examine the leading or trailing edge of the 2nd- through 4th-stage nozzle segments (Fig. 608) for cracks, burns or missing material:
NOTE: You can only make an inspection of the areas that you can see
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