26-15-04
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A
747-400
MAINTENANCE MANUAL

APU Fire Shutdown Module Installation
Figure 401

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747-400 MAINTENANCE MANUAL
 S 494-004
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURIES OR DAMAGE TO EQUIPMENT.
 (3)  
Do this task: Installation of the Door Locks on the Body Landing (Ref 32-00-30/201).

 S 034-005

 (4)  
Disconnect the electrical connector DM869.

 S 034-006

 (5)  
Hold the module and remove the bolts that hold the module to the airplane.

 S 024-007

 (6)  
Remove the module.

 TASK 26-15-04-404-008
 3.  Install APU Fire Shutdown Module (Fig. 401)________________________________
 A. References
 (1)  
26-15-00/501, APU Fire Detection System

 (2)  
32-00-30/201, Landing Gear Door Locks

 (3)  
49-11-00/201, Auxiliary Power Unit

 (4)  
IPC 26-15-01 Fig.1

 B. Access
 (1)  
Location Zone
 138 Body Landing Gear Well R.H.

 (2)  
Access Panels
 761 Body Landing Gear - Aft Inboard Right
 763 Body Landing Gear - Fwd Inboard Right

 C. Procedure
 S 424-009
 (1)
Put the module in its correct position in the wheel well.

 S 434-010

 (2)  
Use the bolts to install the module to the support bracket in the wheel well.

 (a)  Tighten the bolts.
 S 434-011
 (3)  Install the electrical connector DM869 in the receptacle on the module.
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747-400 MAINTENANCE MANUAL
 S 864-012
 (4)  Remove the DO-NOT-CLOSE tag and close these circuit breakers:
 (a)  P6 Main Power Distribution Panel
 1) 6C5 ALTN PWR LOOP A APU FIRE/BLD DUCT OVHT
 2) 6C6 FIRE SW UNLOCK
 3) 6H14 APU FIRE/BLD DUCT OVHT LOOP A
 4) 6H15 APU FIRE/BLD DUCT OVHT LOOP B

 S 714-013
 (5)  
Do the Warning Indication Test in the APU System Test (Ref 26-15-00/501).

 S 714-014

 (6)  
To do the APU shutdown, use the remote stop switch and the fire switch (Ref 49-11-00/201).

 S 094-015
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURIES AND DAMAGE TO EQUIPMENT.
 (7)  Do this task: Removal of the Door Locks on the Body Landing Gear (Ref 32-00-30/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 APU FIRE SHUTDOWN MODULE - ADJUSTMENT/TEST
　
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