Auxiliary Power Unit

Question 1

APU Oil level is checked at the ___ _____ in the ________ maintenance bay.

Answer 1

APU Oil level is checked at the APU panel in the tailcone maintenance bay.

Question 2

An Amber Oil light in the APU service panel indicates that the APU oil level is _____.

Answer 2

An Amber Oil light in the APU service panel indicates that the APU oil level is low.

Question 3

The APU may be operated for ___ hours with an amber Low Oil light.

Answer 3

The APU may be operated for 20 hours with an amber Low Oil light.

Question 4

The APU supplies ___ _______ and ______ _____.

Answer 4

The APU supplies DC power and bleed air.

Question 5

The APU supplies DC electrical power to the ____side of the system. The ___ ____ allows it to power the entire system.

Answer 5

The APU supplies DC electrical power to the left side of the system. The bus tie allows it to power the entire system.

Question 6

Failure of the APU’s fire detection system will cause the APU to _______ automatically and ______ it from starting.

Answer 6

Failure of the APU’s fire detection system will cause the APU to shutdown automatically and prevent it from starting.

Question 7

The APU is/is not approved for unattended operation.

Answer 7

The APU is not approved for unattended operation.