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A220 APU Questions with Detailed Verified
Answers
Question: What systems are supported by the APU?
Ans✅ ✅: It provides an alternate source of AC electrical power and bleed air for
main engine starting and air conditioning
Question: Where are the APU indications displayed?
Ans✅ ✅: On the STATUS, AIR, ELEC, and FUEL synoptic pages.
Question: What happens if an APU BITE test fails?
Ans✅ ✅: The FAIL light on the APU panel illuminates and an APU FAULT advisory
message is displayed on the EICAS page
Question: What does the FAIL amber light on the APU panel mean?
Ans✅ ✅: APU BITE test has failed
APU Fire detection fails on the ground
Failed start
Question: How is the APU inlet door controlled?
Ans✅ ✅: By the APU ECU
Question: What is the power output of the APU generator?
Ans✅ ✅: 115 VAC, 400 HZ, 75kVA
Question: At what percent RPM is the APU ready for electrical and
pneumatic loading?
Ans✅ ✅: 95%
A220 APU Questions with Detailed Verified
Answers
Question: What systems are supported by the APU?
Ans✅ ✅: It provides an alternate source of AC electrical power and bleed air for
main engine starting and air conditioning
Question: Where are the APU indications displayed?
Ans✅ ✅: On the STATUS, AIR, ELEC, and FUEL synoptic pages.
Question: What happens if an APU BITE test fails?
Ans✅ ✅: The FAIL light on the APU panel illuminates and an APU FAULT advisory
message is displayed on the EICAS page
Question: What does the FAIL amber light on the APU panel mean?
Ans✅ ✅: APU BITE test has failed
APU Fire detection fails on the ground
Failed start
Question: How is the APU inlet door controlled?
Ans✅ ✅: By the APU ECU
Question: What is the power output of the APU generator?
Ans✅ ✅: 115 VAC, 400 HZ, 75kVA
Question: At what percent RPM is the APU ready for electrical and
pneumatic loading?
Ans✅ ✅: 95%