TM 1–1520–238–T–1
3–21/(3–22 blank)
3–4
APU EMERGENCIES
3–4
Personnel Required:
(3)
1. In case of an APU FIRE, perform emergency procedures
as specified in the following steps.
a. Announce the type of emergency over the
intercommunication system (ICS) and advise assisting
personnel of your intentions.
b. On APU/FIRE TEST panel, pull APU FIRE PULL
handle up (out).
c. Set FIRE BTL switch to PRI.
d. Set FIRE BTL switch to RES.
e. On APU/FIRE TEST panel, set APU
START/RUN/OFF switch to OFF.
f. On ELEC PWR panel, set BATT/OFF/EXT PWR
switch to OFF.
g. Get out of aircraft quickly as possible and stand clear
of emergency personnel.
2. For all NON–FIRE related emergencies, perform
emergency procedures as follows:
a. Announce the type of emergency over the ICS and
advise assisting personnel of your intentions.
b. On APU/FIRE TEST panel, set APU
START/RUN/OFF switch to OFF.
c. On ELEC PWR panel, set BATT/OFF/EXT PWR
switch to OFF.
d. Get out of aircraft as quickly as possible and stand
clear of emergency personnel.
3. If an environmental control unit (ENCU) malfunction
occurs, perform the emergency procedures as follows:
a. On ECS panel, set ENCU switch to OFF.
b. Set ECS switch to STBY FAN – if desired.
c. Emergency crew station ventilation door – Open if
desired.
END OF TASK
