S 865-005
(4) Open these circuit breakers on the main power distribution panel, P6, and attach DO-NOT-CLOSE tags:
(a) 6G1, FIRE EXT APU
S 865-007
(5) Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags:
(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
(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 ENG LEFT
(i)
11J27, FIRE DET ALTN PWR ENG RIGHT
D. Do a Test of the APU Fire Detection Loops
S 865-008
(1)
Try to pull out the APU fire switch, on the aft pilots control stand, P8, and make sure it is locked in position.
S 865-009
(2)
Push the ECS MSG switch on the EICAS maintenance panel on the side panel, P61.
S 865-010
(3)
Push and hold the ENG/APU/CARGO switch, on the FIRE/OVHT TEST panel, M10445 (on P8).
NOTE: Use the ECS MSG switch when it is necessary to see subsequent
____ EICAS pages until all of the EICAS messages have been on the displays.
S 755-011
(4) Make sure these EICAS messages show on the bottom display:
(a) APU FIRE LP 1
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(b) APU FIRE LP 2
S 755-012
(5) After 2-4 seconds, make sure these indications occur:
(a)
The red APU light on the APU fire switch (on P8) comes on.
(b)
The red FIRE light, on the captains instrument panel, P1-3, comes on.
(c)
The EICAS message, APU FIRE, shows on the top display.
(d)
The red master WARNING lights, on the glare shield panel, P7, come on.
(e)
The fire bell is heard.
(f)
The red APU FIRE light, on the nose landing gear control housing, P62, comes on. P62 is installed on the right side of the nose landing gear.
(g)
With the plane on the ground, the fire warning horn for the APU, on P62, is heard.
S 865-013
(6)
Pull out the APU fire switch (on P8). Do not turn the handle.
S 755-014
(7)
Make sure these indications occur:
(a)
The red APU fire switch stays on.
(b)
The fire bell stops.
(c)
The red APU FIRE light (on P62) goes off.
(d)
The APU fire warning horn stops.
S 865-015
(8)
Push in the APU fire switch handle.
(9)
Release the ENG/APU/CARGO switch.
S 755-017
(10)
Make sure all of the indications stop.
S 865-016
E. Do a Test of the Fire Detection System Fail Light
S 865-018
(1) Open these circuit breakers, on the P11 panel, in Table 501 for the APU fire detection system and attach DO-NOT-CLOSE tags:
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MAINTENANCE MANUAL
~............................................................. | Table 501 | ............................................................... | SYSTEM | CIRCUIT BREAKERS | ...............................................................
| APU FIRE | 11A32, INDICATOR LIGHTS 1 |
| | 11A35, INDICATOR LIGHTS 4 |
| | 11B18, WARN ELEX B |
| | 11B24, FIRE DETECTION APU 1 |
| | 11B25, FIRE DETECTION APU 2 |
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