TM 1–1520–238–T–1
3–14
3–3
APU – OPERATING INSTRUCTIONS (cont)
3–3
c. Verify fire extinguisher blowout indicator below left
engine nacelle is intact.
d. Verify APU circuit breaker in aft avionics bay is
closed.
CAUTION
Only qualified and/or certified individuals
are authorized to operate the APU. Failure to
comply could result in equipment damage.
NOTE
Refer to paragraph 3–4 for APU emergencies.
2. Enter pilot and CPG crew stations and observe all safety
precautions.
a. On pilot center circuit breaker panel, verify the
following circuit breakers are closed:
(1) FIRE DETR–ENG 1
(2) FIRE DETR–ENG 2
(3) FIRE DETR–APU
(4) FIRE EXTGH–PLT
(5) FIRE EXTGH–CPG
(6) FIRE EXTGH–APU
(7) LT–CAUTION
(8) FUEL–APU
(9) FUEL–BST
(10) APU HOLD
3. Locate communications cable on left–hand side of pilot
seat.
4. Attach microphone headset/microphone adapter cord
plug to communications cord receptacle.
5. Attach microphone headset/maintenance headset cord
assembly to connector J306 located behind right wing tip
door RW12.
6. Verify pilot station switch/control settings as follows:
