| 29 |
What events take place when the APU fire switch is pulled up ?
Backs up the APU automatic shutdown.
Deactivates the fuel solenoid and closes the APU fuel shutoff valve.
Closes the APU bleed air valve.
Closes the APU air inlet door.
Trips the APU generator control relay and generator breaker.
Allows the APU fire switch to be rotated for bottle discharge.
Arms the APU fire extinguisher discharge squib
Deactivates the fuel solenoid and closes the APU fuel shutoff valve.
Closes the APU bleed air valve.
Closes the APU air inlet door.
Trips the APU generator control relay and generator breaker.
Allows the APU fire switch to be rotated for bottle discharge.
Arms the APU fire extinguisher discharge squib
| Engine and APU Fire Protection |