72-33-00
 ALL  ú ú C02 Page 819 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
2) Min. distance between 2 defects: 0.118 in. (3 mm)
 3) Max. depth of defect: 0.118 in. (3 mm)
 4) Max. number of defects per 3.93 sq. in. (1 sq. dm): 3

 S 148-082-C00
 (23)
 Remove abradable material dust and hand sanding residues from the repair area with a vacuum cleaner.

 S 148-106-C00

 (24)
 Remove all protective or masking tape from the acoustical panels.

 S 438-084-C00

 (25)
 Install the acoustical panel screws and tighten them to
 65-75 pound-inches (7.5-8.5 N.m.).

 S 438-083-C00

 (26)
 Remove the mats from the lower half of the inlet cowl.

 S 868-085-C00

 (27)
 Remove the DO-NOT-CLOSE tag and close the applicable circuit breaker.

 (a)  P6 Load Control Center
 1) ENG 1 START VALVE
 2) ENG 2 START VALVE

 S 868-086-C00
 (28) Remove the DO-NOT-OPERATE tag from the start levers.
 TASK 72-33-00-348-087-C00
 5.  ENGINES WITH THE RTV SILICONE (BLACK COLOR) ABRADABLE SHROUD; Repair of the Abradable Shroud with Circular Patches
____________________________________________________
 A.  General
 (1)  This task refers to a procedure for the in-place repair of the abradable shroud by installation of circular patches 1.968 in. (50 mm) maximum diameter.
 NOTE: The following patch repair is estimated to take less than
____ 3 hours in the hangar when done by skilled mechanics familiarized with the procedure.
 B.  Equipment
 (1)  
Protective mats (two are necessary) - Rubber Manufacturer Association, Grade SC43, Neoprene sponge, 1.0 in. thick, approximately 3.0 x 4.0 feet with warning streamer attached.

 (2)  
Scalpel - locally available

 (3)  
Heat gun

 (4)  
Hollow punching tool

 C.  Consumable Materials
 (1)  
Abrasive cloth - CP2239 grit size 80 or 120

 (2)  
Methyl Ethyl Ketone - CP1040

 (3)  
Base RTV 147A - CP2297

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 72-33-00
 ALL  ú ú C02 Page 820 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(4)  
Catalyst (hardener) RTV 147B - CP2298

 (5)  
Primer MB - CP2340

 (6)  
RTV 630, Part A and B - CP2339

 (7)  
Primer SS 4155 - CP2215

 (8)  
Heat - resistant tape 3M No. 5490 - CP2306

 (9)  
Abradable liner (Ref CFMI IPC 72-23-00 Item 26-790)

 D. Reference
 (1)  
AMM 72-31-01/401, Spinner

 (2)  
AMM 72-31-02/401, Fan Rotor Blades

 (3)  
CFMI IPC 72-23-00, Fig. 26, Item 790

 E. Access
 (1)  Location Zones
 501 Engine No. 1, Left Inlet
 601 Engine No. 2, Right Inlet
 506 Engine No. 1, Fan Frame
 606 Engine No. 2, Fan Frame

 F. Prepare to Locally Recondition the Abradable Shroud
 S 868-088-C00
 (1)  Make sure the start levers are in the CUTOFF position.
 (a)  Install the DO-NOT-OPERATE tag on the start levers.
 S 868-089-C00
 (2) Open the applicable circuit breaker and install a DO-NOT-CLOSE tag.
 (a)  P6 Load Control Center
 1) ENG 1 START VALVE
 2) ENG 2 START VALVE

 S 038-111-C00
 CAUTION:_______MAKE SURE YOU INSTALL THE MATS IN THE INLET COWL. THIS WILL PREVENT DAMAGE FROM TOOLS, PARTS OR UNWANTED MATERIAL THAT FALL ON THE INLET COWL.
 (3)  
Install the mats into the lower half of the inlet cowl.

 (4)  
Remove the spinner (AMM 72-31-01/401).

 S 018-110-C00

 (5)  
Remove a sufficient number of fan blades to get access to the repair area (AMM 72-31-02/401).
　
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