72-63-00
 ALL  ú ú C01 Page 6 ú Jul 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ACCESSORY GEARBOX - ADJUSTMENT/TEST
___________________________________
 1.  General
_______
 A.  This procedure gives the leak check procedure for the oil seals on the accessory gearbox (AGB).
 B.  Pressurize the AGB with air (or nitrogen) and examine for air leakage at the pad drains.
 TASK 72-63-00-215-001-C00
 2.  Examine the Accessory Gearbox for Leakage
_________________________________________
 A.  General
 (1)  
For this procedure the accessory gearbox will be referred to as the AGB.

 (2)  
For this procedure the transfer gearbox will be referred to as the TGB.

 B.  Equipment
 (1)  
Adapter, AGB Locking - 856A3509, CFM
 International, P.O. Box 15514, Cincinnati, OH
 45215

 (2)  
Wrench - 856A3604, CFM International

 (3)  
Support - 856A3594P02, CFM International

 (4)  
Tubes, plastic - suitable for slip-fit over
 drain tubes

 (5)  
Container - approximately 1 gallon (4 liters)
 of water

 C.  Consumable Materials
 (1)  
Filtered air or nitrogen source - 10-12 psig
 (0.7-0.8 kpa), 40 microns absolute filtration,
 oil less than 40 mg for each kilogram of air,
 water content at -40°F (-40°C) dew point at
 atmospheric pressure, ambient temperature

 (2)  
D00601, Grease (CP2101) graphite - GP40, Aeroshell 8

 (3)  
D00599, Oil (CP2442) Engine - CFMI SB 79-001

 D.  References
 (1)  
AMM 71-11-02/201, Fan Cowl Panels

 (2)  
AMM 72-60-00/201, Accessory Drives

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 ////////////////////////
SEE A TRANSFER
B
BOLT
GEARBOX (TGB)
WASHER
(5 LOCATIONS) A B

O-RING
HOUSING FOR THE HORIZONTAL COVER
DRIVE SHAFT
DRIVE PAD
FOR THE

LANYARD WITH
A
N2 ROTOR
CFMI SB 72-500STARTER DRIVE PAD
ACCESSORY GEARBOX (AGB) LOCKING BOLT
AGB
(5 LOCATIONS)
HOUSING A AGB
FWD LOCKING ADAPTER
NOTE:SHOWN WITHOUT THE QEC FOR CLARITY.
SQUARE GEARSHAFT DRIVE
DRIVE FOR THE N2 ROTOR
A-A S-M56-MM-1259-(1)-00-B
Separation of Accessory Gearbox and Transfer Gearbox
Figure 501 (Sheet 1)

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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
AGB
SEAL RING
SELF-LOCKING NUT  DRIVE SHAFT

B-B
S-M56-MM-1267-(1)-00-B (M)
Separation of Accessory Gearbox and Transfer Gearbox Figure 501 (Sheet 2)
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 72-63-00
 ALL  ú ú C01 Page 503 ú Mar 15/92
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