Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
What causes the APU fault light to illuminate on overhead panel? |
APU fault and/or fire is detected APU shutdown due to fault and/or fire Momentarily during APU controller self test |
|
|
Start sequence of APU to START? |
Opens the APU fuel valve and inlet door Activate AC or DC fuel pump Powers the APU controller |
|
|
Where are the APU indications? |
Status page |
|
|
Electrical power is available upto what height? |
Service Ceiling (43,100') |
|
|
How high is Bleed Air available from the APU? |
22,000' |
|
|
How can the APU be started? |
Electrical Starter or ATS |
|
|
What has priority over the start? |
ATS, powered by bleed air or ground cart |
|
|
Where does the fuel come from to run the APU and what fuel pumps will it use? |
Left fuel manifold. Will use either DC or left forward AC fuel pump |
|
|
How many start attempts can be made on the APU? |
3 attempts within 60 minutes |
|
|
What will cause the APU to automatically start in flight? |
Loss of power to BOTH AC transfer busses, regardless of switch position |
|
|
Does the APU have a cool down period? |
Yes, when switch is selected to OFF |
|
|
When is the APU in attended mode? |
Aircraft on the ground with either engine running OR when airplane is in flight |
|
|
What will cause the APU to automatically shutdown in unattended mode? (10) |
APU fire Overspeed High EGT High Oil temperature Low Oil pressure Intake door failure APU controller failure Speed droop No combustion on start No acceleration on start |
|
|
What will cause the APU to automatically shutdown in attended mode? (4) |
APU fire APU controller fails Overspeed Speed droop |
