(2)  
AMM 78-31-00/201, Thrust Reverser System

 (3)  
IPC 26-11-01 Fig.1

 (4)  
WDM 26-11-11 thru 26-11-43

 (5)  
SSM 26-11-01 thru 26-11-04

 C. Access
 (1)  
Location Zone
 220 Control Cabin
 412 Engine 1
 422 Engine 2
 432 Engine 3
 442 Engine 4

 (2)  
Access Panel 415 and 416 Thrust Reverser Halves - Engine 1 425 and 426 Thrust Reverser Halves - Engine 2 435 and 436 Thrust Reverser Halves - Engine 3 445 and 446 Thrust Reverser Halves - Engine 4

 D. Prepare for the Test
 S 865-012
 (1)  
Supply electrical power (Ref 24-22-00/201).

 S 865-013

 (2)  
Close these circuit breakers:

 (a)  P6 Main Power Distribution Panel 1) 6C1 ALTN PWR ENG FIRE/OVHT DET LOOP A ENG 1 2) 6C2 ALTN PWR ENG FIRE/OVHT DET LOOP A ENG 2 3) 6C3 ALTN PWR ENG FIRE/OVHT DET LOOP A ENG 3 4) 6C4 ALTN PWR ENG FIRE/OVHT DET LOOP A ENG 4 5) 6G10 ENG FIRE/OVHT DET ENG 2 LOOP A 6) 6G11 ENG FIRE/OVHT DET ENG 2 LOOP B 7) 6G12 ENG FIRE/OVHT DET ENG 4 LOOP A 8) 6G13 ENG FIRE/OVHT DET ENG 4 LOOP B 9) 6H10 ENG FIRE/OVHT DET ENG 1 LOOP A 10) 6H11 ENG FIRE/OVHT DET ENG 1 LOOP B 11) 6H12 ENG FIRE/OVHT DET ENG 3 LOOP A 12) 6H13 ENG FIRE/OVHT DET ENG 3 LOOP B
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747-400 MAINTENANCE MANUAL
 S 865-014
 (3) Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel 1) 6G1 FUEL SHUTOFF VALVE ENG 1 2) 6G2 FUEL SHUTOFF VALVE ENG 2 3) 6G3 FUEL SHUTOFF VALVE ENG 3 4) 6G4 FUEL SHUTOFF VALVE ENG 4 5) 6H1 FIRE EXTINGUISHER ENG 1&3 B 6) 6H2 FIRE EXTINGUISHER ENG 1&3 A 7) 6H3 FIRE EXTINGUISHER ENG 2&4 B 8) 6H4 FIRE EXTINGUISHER ENG 2&4 A 9) 6H5 FIRE EXTINGUISHER APU 10) 6H6 FIRE EXTINGUISHER LOWER CARGO 11) 6C6 FIRE SW UNLOCK
 S 015-015
 (4)  
Open the applicable thrust reverser half (Ref 78-31-00/201).

 E.
Engine Fire Detection Indication System Test

 S 865-067
 (1)  
Push and hold the FIRE/OVHT TEST switch on the Miscellaneous Switching Panel (P5).

 S 845-068

 (2)  
Make sure these EICAS messages do not show.

 (a)  
DET FIRE/OVHT 1

 (b)  
DET FIRE/OVHT 2

 (c)  
DET FIRE/OVHT 3

 (d)  
DET FIRE/OVHT 4

 (3)
Push the LSK next to <OTHER FUNCTIONS on the CMC main menu.

 (4)  
Push the LSK nest to <INPUT MONITORING.

 S 865-069
 S 865-070
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747-400 MAINTENANCE MANUAL
 (5)  S 865-071Write in "E/034/270/00"
 (6)  S 865-195Push the LSK next to "-/--/---/--".
 (7)  S 865-073Make sure bit 15 (engine 1 fire loop A) is set to zero.
 (8)  S 025-074Disconnect connector DT681D (upper aft fire detector loop A) at engine 1 (left side).
 (9)  S 425-075Install a jumper wire in loop A between the center pin of the connector, DT681D, and the connector shell of the fire detector element, T681.
 S 865-196

 (10)
 Make sure bit 15 on the CMC input monitoring is set to one.

 S 025-077

 (11)
 Remove the jumper wire from loop A.

 S 865-078

 (12)
 Make sure bit 15 on the CMC input monitoring is set to zero.

 S 425-079

 (13)
 Install a jumper wire in loop A between the center pin and the connector shell of the fire detector element, T681.

 NOTE: Keep the loop A jumper wire connected.
____
 S 865-080
 (14)
 Make sure bit 15 on the CMC input monitoring is set to one.

 S 865-197
　
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