CRJ 700 Differences APU
Test Study Set
What type of APU does the CRI 700 have? - Answer Allied Signal RE220RJ.
Where is the APU located? - Answer The APU is located in the tail cone in a fireproof
compartment.
What is the range of the APU exhaust hazard area? - Answer There is none.
What will sound the outside fire warning horn of the APU? - Answer There is no fire
warning horn on the CRJ700.
Where is the APU intake door located? - Answer It is on the right side of the tail cone
area.
Where is the air for the APU oil cooler and APU compartment ventilation drawn from? -
Answer The APU intake door provides air intake for all of these functions:
Air for the APU compressor.
APU oil cooler.
APU compartment ventilation.
What is the maximum operating altitude for the APU? - Answer 41,000 feet
What is the maximum starting altitude for the APU? - Answer 37,000 feet
What is the maximum altitude for APU bleed air extraction for air condition? - Answer
25,000 feet
What is the maximum altitude for using the APU for in-flight engine starts? - Answer
21,000 feet
What is the approximate fuel burn of the APU during bleed air and electrical loading? -
Answer Approximate fuel burn is 280 pounds an hour.
What would happen if the APU fuel pump failed while the APU was operating? - Answer
A bypass valve will open to allow fuel to be drawn past the pump and the APU will keep
running.
What are the different APU door positions 0n the EICAS page? - Answer The APU door is
either open or closed on the EICAS page.
ls open or closed the only two positions of the APU door? - Answer The door of the APU
Test Study Set
What type of APU does the CRI 700 have? - Answer Allied Signal RE220RJ.
Where is the APU located? - Answer The APU is located in the tail cone in a fireproof
compartment.
What is the range of the APU exhaust hazard area? - Answer There is none.
What will sound the outside fire warning horn of the APU? - Answer There is no fire
warning horn on the CRJ700.
Where is the APU intake door located? - Answer It is on the right side of the tail cone
area.
Where is the air for the APU oil cooler and APU compartment ventilation drawn from? -
Answer The APU intake door provides air intake for all of these functions:
Air for the APU compressor.
APU oil cooler.
APU compartment ventilation.
What is the maximum operating altitude for the APU? - Answer 41,000 feet
What is the maximum starting altitude for the APU? - Answer 37,000 feet
What is the maximum altitude for APU bleed air extraction for air condition? - Answer
25,000 feet
What is the maximum altitude for using the APU for in-flight engine starts? - Answer
21,000 feet
What is the approximate fuel burn of the APU during bleed air and electrical loading? -
Answer Approximate fuel burn is 280 pounds an hour.
What would happen if the APU fuel pump failed while the APU was operating? - Answer
A bypass valve will open to allow fuel to be drawn past the pump and the APU will keep
running.
What are the different APU door positions 0n the EICAS page? - Answer The APU door is
either open or closed on the EICAS page.
ls open or closed the only two positions of the APU door? - Answer The door of the APU
