(1) On the pilots' overhead P5 panel, turn the APU master control switch to the ON position.
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S 866-087
(2)
Find the APU fuel shut off valve actuator on the left inboard rear spar.
S 746-088
(3)
Make sure the manual override handle on the APU fuel shutoff valve actuator is in the OPEN position.
S 986-089
(4)
Pull the APU fire handle out to the emergency fire position.
NOTE: When you pull the fire handle into the emergency fire
____ position, it is necessary to use the manual fire override switch behind the fire handle.
S 746-090
(5)
Make sure the manual override handle on the APU fuel shutoff valve actuator is in the CLOSE position.
S 986-091
(6)
Put the APU fire handle to the normal (horizontal) position.
S 986-092
(7)
On the P5 panel, turn the APU master control switch to the OFF position.
TASK 26-22-02-716-093
5. APU Air Supply Valve Operation Check
____________________________________
A. General
(1) This procedure makes sure the APU air supply valve is closed when you pull the APU fire switch.
B. References
(1)
AMM 06-42-00/201, Empennage (Major Zone 300) Access Doors and Panels
(2)
AMM 24-22-00/201, Electrical Power - Control
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C. Access
(1)
Location Zones
153 Aft Cargo Compartment (Left)
154 Aft Cargo Compartment (Right)
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
822 No. 2 Cargo Door
D. Prepare for Check
S 866-094
(1)
Supply electrical power (AMM 24-22-00/201).
S 866-095
(2)
Make sure the left engine fire handle is in the usual (down) position.
E. Do the APU Air Supply Valve Operational Check due to the APU Fire Switch Activation (Fig. 602).
S 866-096
(1) Open these circuit breakers on the P11 panel and attach a
DO-NOT-CLOSE tag:
(a)
11A35, INDICATOR LIGHTS 4
(b)
11Q23, AIR SUPPLY APU BLEED CONT
S 866-296
(2) AIRPLANES WITH THE APU START PANEL M10324;
Do the steps that follow:
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(a)
Open this circuit breaker on the E6 rack in the Aft Equipment Center and attach a DO-NOT-CLOSE tag: 1) 6E6, APU START
(b)
Remove the APU Start Control relay, K10030, from the E6 rack in the Aft Equipment Center.
(c)
Connect a jumper wire between pin B1 and ground of connector D2436 on the APU START CONTROL relay.
(d)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the E6 rack: 1) 6E6, APU START
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