(a)  6G1, FIRE EXT APU

 (2)  
At the SQUIB TEST control panel, P61, push and hold the TEST switch.

 (3)  
Make sure the green APU light comes on.

 S 866-062
 S 216-066
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 S 866-067
 (4)  
Release the TEST switch.

 S 216-071

 (5)  
Make sure the green APU light goes off.

 S 946-078

 (6)  
Open these circuit breakers on the P6 panel and attach DO-NOT-CLOSE tags:

 (a)  6G1, FIRE EXT APU
 J. Do the APU Fire Handle Unlock Solenoid Circuit Check
 S 866-279
 (1)  Supply electrical power (AMM 24-22-00/201).
 S 866-280
 (2)  Make sure these systems operate: (a) EICAS (AMM 31-41-00/501) (b) Warning System (AMM 31-51-00/501) (c) Master Dim and Test System (AMM 33-16-00/501)
 S 866-281
 (3)  Make sure this circuit breaker on the P6 is open: (a) 6G1, FIRE EXT APU
 S 866-285
 (4)  Make sure the following circuit breakers on the P11 panel are closed.
 (a) (b) (c) (d) (e) (f)  11A32, IND LIGHTS 111A35, IND LIGHTS 411B24, FIRE DET APU 111B25, FIRE DET APU 211B18, WARN ELEX B11J33, WARN ELEX A

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 (g)  11P29, R IND LTS 2
 S 286-286
 (5)  
Pull the APU fire handle or the aft pilot's control stand P8, and make sure that it is locked into its usual position.

 S 866-287

 (6)
Push and hold the ENG/APU/CARGO TEST switch on the P8 panel.

 (a)  Make sure the APU fire handle light comes on.
 S 866-288
 CAUTION: DO NOT TURN THE FIRE HANDLE WHEN YOU PULL IT INTO THE EMERGENCY
_______ FIRE POSITION. IF YOU TURN THE FIRE HANDLE, THE CONTENTS OF THE FIRE BOTTLE CAN BE LET OUT.
 (7)  Pull the APU fire handle into the FIRE position.
 (a)  
Make sure the APU fire handle releases from its usual position.

 (b)  
Make sure the APU handle light remains on when the handle is pulled.

 S 866-289
 (8)  
Put the APU fire handle back to its usual position.

 S 866-290

 (9)  
Release the ENG/APU/CARGO TEST switch.

 S 866-294

 (10)
 Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:

 (a)  11B33, APU REMOTE FIRE IND
 TASK 26-22-02-716-079
 3. APU Generator Field Control Relay Check
_______________________________________
 A. General
 (1)  This procedure makes sure the APU generator field control relay opens when you pull the APU fire switch.
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MAINTENANCE MANUAL

 B.  Reference
 (1)  AMM 24-22-00/201 - Electrical Power - Control
 C.  Access
 (1)  
Location Zones
 211 Flight Compartment (Left)
 212 Flight Compartment (Right)
 315 APU Compartment (Left)
 316 APU Compartment (Right)

 (2)  
Access Panels
 313AL Control Bay Access Door
 315AL APU Access Door
 316AR APU Access Door

 D.  Prepare for Check
 S 866-080
 (1)  Supply electrical power (AMM 24-22-00/201).
　
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