Details Title: APU Description: Cessna Sovereign Total Flash Cards: 28 Created: 03/22/2009 22:16:22		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Aviation Flashcards
Cards in this set: Term           Max altitude to start APU Definition           FL 200 Term           Max altitude to operate APU Definition           FL 300 Term         From what wing is the APU fuel supplied from? Definition            Right wing Term         Approximate fuel burn of APU Definition         110 PPH unloaded   125 PPH loaded Term           Max EGT Definition           690 C Term       What happens when pressing MAX COOL? Definition           Bleed control valve opens fully after 20 seconds Term       From what bus is the APU powered? Definition           Left emer bus Term         What happens to the APU with loss of DC power? Definition           APU shuts down Term         Why should max cool not used in manual mode? Definition         The temperature control valves (TCV) could be fully open   Will cause overtemp under floor ducts Term       When can you retart the APU after shut down? Definition         30 seconds after displaying 0% Term       What lights illuminate during the APU test? Definition           All lights but reset Term         What does "APU system fail" mean? Definition       ECU detects a fault prior to start     Or ECU initiate shutdown due to exceedance or loss of sensors Term         What is required to get the audio test portion of the APU? Definition       a) Avionics on   b) Or APU master on for more than 1 minute Term       When are transient amps allowed? Definition           Engine start + 2 minutes Term         What must you check during APU start around 50% RPM? Definition         GCU opens start relay (APU relay engaged light extinguishes) Term         When does the APU relay engaged illuminates? Definition       a) Anytime APU generator is providing power to the left emer bus   b) During APU start Term       Why can't we just press "stop" when the APU relay is stuck closed? Definition           Once the generator becomes a starter again, it will keep motoring Term         What prevents an APU to start? Definition     a) APU fire   b) APU fire dectection fail   c) Fire bottle baggage/APU low message Term         Why can't max cool give hot air? Definition           Because APU shuts off valves (BCV) to avoid EGT limit Term         When should you check the APU oil? Definition           5 minutes after shutdown Term       Why should you turn off APU bleed air prior to engine start? Definition           Prevents APU exhaust to enter the cabin Term         What CAS messages will shutdown the APU? Definition   a) APU fire   B) APU fire detect fail   c) Fire bottle low bag-apu   d) ACM bleed leak   Term         When does the "ready to load" light comes on? Definition           95% + 4 seconds Term         What valve does the APU master switch open or close? Definition           APU firewall shut off valve Term       How long can you fly with the APU amber light illuminated in tailcone compartment? Definition           20 hrs Term       How do you know if the relay engaged light did extinguish at 50%? Definition           Turn off the generator. The relay should open, extinguishing the light Term           Max speed to start the APU? Definition             250 kts Term       How can you start the APU in flight without the passengers hearing the "APU FIRE" voice? Definition           Press the mute button