Trình bày quá trình SHUTDOWN APU

When you release the MASTER SW pushbutton switch in the OFF position:

-       If the bleed air mode was used, a 60s cool-down cycle starts

APU AT 95% RPM

-       APU AVAIL lights go off

APU below 50% RPM

-       The de-oil solenoid open

APU below 7% RPM

-       The de-oil solenoid closes      

-       APU fuel LP valve closed

-       ECB sends a 'FLAP CLOSE'-command to the air intake flap actuator for 30s

-       The air intake flap actuator moves the flap into the 'CLOSED'-position within approximately 20s

-       ECB de-energizes itself when air intake has reached the fully closed positon