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A220 FLIGHT CONTROLS Questions with
Detailed Verified Answers
Question: Which FBW system components position the flight control
surfaces thru the PCU hydraulic actuators?
Ans✅ ✅: The REU's
Question: What are the REU's?
Ans✅ ✅: Remote Electronics Units- Transmit command from the PFCC to the
hydraulic Power control units which are electrically controlled hydraulic actuators that
move the flight controls.
Question: What are the two modes of the FBW system?
Ans✅ ✅: Normal mode
Direct mode
Question: When does the HSTAB trim the aircraft like a conventional
aircraft?
Ans✅ ✅: In Direct mode
Question: When is aileron trim available?
Ans✅ ✅: In Direct mode
Question: What will happen if the pilot were to hold the trim switch for
an extended period?
Ans✅ ✅: If manual trim is run over 3 secs, 2 beeps sound and the FBW system will
stop the trim command
Question: In normal mode when will the pilot be able to trim for a
specific HSTAB position
A220 FLIGHT CONTROLS Questions with
Detailed Verified Answers
Question: Which FBW system components position the flight control
surfaces thru the PCU hydraulic actuators?
Ans✅ ✅: The REU's
Question: What are the REU's?
Ans✅ ✅: Remote Electronics Units- Transmit command from the PFCC to the
hydraulic Power control units which are electrically controlled hydraulic actuators that
move the flight controls.
Question: What are the two modes of the FBW system?
Ans✅ ✅: Normal mode
Direct mode
Question: When does the HSTAB trim the aircraft like a conventional
aircraft?
Ans✅ ✅: In Direct mode
Question: When is aileron trim available?
Ans✅ ✅: In Direct mode
Question: What will happen if the pilot were to hold the trim switch for
an extended period?
Ans✅ ✅: If manual trim is run over 3 secs, 2 beeps sound and the FBW system will
stop the trim command
Question: In normal mode when will the pilot be able to trim for a
specific HSTAB position
