Type training · Boeing 777 B2 · ATA 24
Boeing 777 B2: Electrical Power (ATA 24)Type training questions & answers
Generators and converters, ELMS, batteries, TRUs, standby power, FCDC PSAs and autoland buses.
- A worked explanation on every question
- Written for the 777 avionics
- Read in English or 15 other languages
Sample Electrical Power questions with answers
Three questions from the free preview. Think of your answer first, then open the explanation.
1.What type of generator are the 777 backup generators?
- A.An IDG type, at constant speed
- B.A constant-frequency AC type
- C.Variable speed and frequency
Show answer and explanation
Correct answer: C. Variable speed and frequency
The backup generators are variable-speed, variable-frequency; the backup converter turns their output into 400 Hz power. Ref AMM 24-00-00.
2.With the standby power switch at OFF, when does the static inverter stay off?
- A.On the ground
- B.In the air
- C.At all times
Show answer and explanation
Correct answer: A. On the ground
The OFF position keeps the static inverter off on the ground. Ref AMM 24-00-00.
3.How do the P110 and P210 power management panels shed loads?
- A.Alone or together, as sources allow
- B.Always independently of each other
- C.Always together as one system
Show answer and explanation
Correct answer: A. Alone or together, as sources allow
They can shed loads on their own or operate together, depending on which power sources are available. Ref AMM 24-09-00.
Part of the Boeing 777 B2 type course
One chapter of the Boeing 777 B2 type course question bank, for the 777 avionics, written in our own words for revision. Your type course and the aircraft maintenance manual stay the authority: limits and procedures can differ between airframes and operators.
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