APU Flashcards
1
Q
MAINT
A
APU requires maintenance attention but may still be used.
Disarmed when APU switch is off.
2
Q
LOW OIL PRESSURE
A
Oil pressure is low. Auto shutdown will occur in 20 seconds.
Light will also illuminate during start until oil pressure reaches normal. If illuminated at shutdown, will remain lit for 5 minutes
3
Q
FAULT
A
Generally illuminates for APU fault that caused an auto shutdown. Illuminates on shutdown if overspeed protection is lost. Inhibited with APU switch off unless APU fuel valve failed to close.
4
Q
OVERSPEED
A
Illuminates if an actual overspeed occurs and auto shutdown. Will remain illuminated even with switch off. Can also indicate a failed overspeed protection test on shutdown.
