APU Flashcards
What APU is installed?
Honeywell 36-150BD
What is the primary function of the APU?
Starting engines
What is the APU fuel burn?
150 lbs. per hour
Is there an external APU shutoff?
Yes, External Power Control Panel below the right engine
Where does the APU get fuel from?
Right collector tank
How is fuel fed to the APU fuel pump?
Right DC fuel pump until RT engine is running, then main ejector pump supplies the pressurized fuel
Prior to starting the APU, you should ensure what minimum battery voltage?
Greater than 20 volts
How many start attempts are allowed before cooling is required?
2 start attempts with one minute cooling between attempts, then 40 mins cooling
Can the APU be operated with the APU generator inoperative?
Yes per the MEL
What happens with the batteries when starting the APU?
The left battery is powering the start logic for the APU starter
How many start attempts can be made in one minute?
1 start attempt
What is the cooling time between start attempts after two attempts?
40 mins cooling
How many fire bottles are dedicated to the APU?
One bottle
The #2 bottle
What is the role of the right DC fuel pump in APU operation?
It supplies fuel to the APU until the right engine is running
Fill in the blank: The APU fuel pump is fed by the _______ until the right engine is running.
Right DC fuel pump
