S 865-060
 (3)  Open 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
 S 865-061
 (4)  Open this circuit breaker:
 (a)  P6, Main Distribution Panel
 1) 7H15, CARGO SMOKE DET LWR B

 S 865-062
 (5)  Push and hold this switch on the miscellaneous switching module M7317 (P5):
 (a)  FIRE/OVHT TEST
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 26-15-00
 ALL  ú ú 24 Page 514 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 715-063
 (6)  Make sure the EICAS message, TEST IN PROGRESS, comes on.
 S 715-064
 (7)  Make sure the EICAS message, TEST IN PROGRESS, goes out of view in
 approximately seven to ten seconds after the start of the test.
 S 715-122
 (8)  Make sure the EICAS message, FIRE TEST FAIL, comes on.
 NOTE:____ The message, FIRE TEST FAIL, comes on as a result of circuit
 breakers open on related fire/overheat systems.

 S 715-065
 (9)
Make sure the EICAS message, FIRE APU, does not come on.

 S 865-209

 (10)
 Release the test switch.

 S 715-084

 (11)
 Make sure the EICAS (advisory) message, <DET FIRE APU, does not come on.

 S 865-067

 (12)
 Push and hold this switch on the miscellaneous switching module M7317.

 (a) FIRE/OVHT TEST
 S 715-069
 (13)
 Make sure the fire bell operates intermittently in the flight deck.

 S 715-070

 (14)
 Make sure the aural APU fire warning in the RH main wheel well operates (M869).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 26-15-00
 ALL  ú ú 14 Page 515 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 715-071
 (15) Make sure the APU fire handle light on the fire control module M7326 comes on.
 S 865-155
 WARNING:_______DO NOT ROTATE THE FIRE HANDLE. IF THE FIRE HANDLE IS ROTATED, THE THE CONTENTS OF THE APU FIRE EXTINGUISHER BOTTLE WILL BE RELEASED AND MAY HARM PERSONS OR EQUIPMENT.
 (16) Pull the APU fire handle on the fire control module M7326 (P5).
 (a)  
Make sure the fire bell in the flight deck remains on.

 (b)  
Make sure the APU fire warning in the RH main wheel well stops.

 (c)  
Make sure the APU fire handle light on the fire control module M7326 remains on.

 S 865-080
 (17)
 Release the FIRE/OVHT TEST switch.

 S 865-207

 (18)
 Push the APU fire handle to the normal position on the fire control module M7326 (P5).

 S 865-212

 (19)
 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