(b)  
Connect a jumper wire from pins 2 to 4 on the electrical connector, D4398.

 S 865-037
 (5)  Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
 (a)  
11B24, FIRE DETECTION APU 1

 (b)  
11B25, FIRE DETECTION APU 2

 (c)  
11J25, FIRE DET ALTN PWR APU

 S 865-038
 (6)  
Start the APU. Do not put on electrical or a pneumatic load on the APU (AMM 49-11-00).

 S 865-039

 (7)  
Push and hold the ENG/APU/CARGO switch on the FIRE/OVHT test panel, P8.

 (8)  
Make sure the APU stops.

 (9)  
Release the ENG/APU/CARGO switch on the FIRE/OVHT test panel, P8.

 S 865-042

 (10)
 Turn the APU start switch on the overhead panel, P5, to the off position.

 S 755-040
 S 865-041
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 S 865-043
 (11) Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags:
 (a)  
11B24, FIRE DETECTION APU 1

 (b)  
11B25, FIRE DETECTION APU 2

 (c)  
11J25, FIRE DET ALTN PWR APU

 S 035-044
 (12) At the P35 panel in the main equipment center, do these steps:
 (a)  
Remove the jumper wire from pins 2 to 4 on the electrical connector, D4398.

 (b)  
Replace the test relay, K10335.

 S 865-045
 (13) Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
 (a)  
11B24, FIRE DETECTION APU 1

 (b)  
11B25, FIRE DETECTION APU 2

 (c)  
11J25, FIRE DET ALTN PWR APU

 S 715-046
 (14) Do the BITE erase procedure for the APU control unit to erase the APU message. This will prevent the message from the APU control unit nonvolatile memory. This can cause the APU to turn off.
 H. Put the Airplane Back to Its Usual Condition
 S 865-047
 (1)  Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P6 panel:
 (a)  6G1, FIRE EXT APU
 S 865-049
 (2)  Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
 (a)  
11B20, FIRE DETECTION L ENGINE 1

 (b)  
11B21, FIRE DETECTION L ENGINE 2

 (c)  
11B22, FIRE DETECTION R ENGINE 1

 (d)  
11B23, FIRE DETECTION R ENGINE 2

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757 MAINTENANCE MANUAL
 (e)  
11B26, FIRE DETECTION CARGO 1

 (f)  
11B27, FIRE DETECTION CARGO 2

 (g)  
11J24, FIRE DET ALTN PWR CARGO

 (h)  
11J26, FIRE DET ALTN PWR ENGINE LEFT

 (i)  
11J27, FIRE DET ALTN PWR ENG RIGHT

 S 865-050
 (3)  Remove electrical power if it is not necessary.
 TASK 26-15-00-735-026
 3.  AIRPLANES WITH GRAVINER FIRE DETECTION SYSTEMS; System Test - APU Fire Detection System_______________________________________
 A.  Equipment
 (1)  Test Box - APU and Engine Fire Detection System
 -Part Number B26001-1
 B.  References
 (1)  
AMM 24-22-00/201, Electrical Power - Control

 (2)  
AMM 26-22-00/501, APU Fire Extinguishing

 (3)  
AMM 31-41-00/501, Engine Indication and Crew Alerting System (EICAS)

 (4)  
AMM 31-51-00/501, Warning System

 (5)  
AMM 32-09-02/201, Air/Ground Relays

 (6)  
AMM 33-16-00/501, Master Dim and Test

　
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