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Mesa Airlines EJet Study Guide v7 -Engine Exam Complete with Complete Solutions
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Mesa Airlines EJet Study Guide v7 -Engine Exam Complete with Complete Solutions
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Mesa Airlines EJet Study Guide v7 -EngineExam Complete with Complete Solutions
Can the FLEX thrust be reduced lower than CLB thrust? - ANSWER-No
Can the igniters be turned off during flight? - ANSWER-The switch may be moved to the
OFF position but the FADEC disregards the command. The OFF position is used for dry
motoring on the ground only.
Describe N1 spool - ANSWER-• Single-stage fan
• 4-stage LP turbine
Describe N2 spool - ANSWER-- 10-stage compressor (gas generator)
- 2-stage HP turbine
Describe the engine start sequence - ANSWER-• Start switch momentarily to START:
- 7% N2 Ignition
- 20% N2 Fuel flow
- 20% N2 + 5 sec Light-off
- 50% N2 Ignition off
• Engine stabilizes:
- N1 27%
- ITT 460°C
- N2 62%
- FF 550 lbs/hr
- Oil Pressure > 25 psi
Does the FADEC provide engine start protection? - ANSWER-Only on the ground for a
hot start, hung start or no light-off
How many igniters activate for engine start? - ANSWER-• Ground 1 igniter ( switch in
AUTO )
• Flight 2 igniters ( switch in AUTO )
How many igniters per engine? - ANSWER-2 per engine
How much thrust do the CF-34-8E5 engines produce? - ANSWER-13,000-14,200 lbs.
(ISA)
Is only one FADEC channel used every flight? - ANSWER-No. They automatically
alternate with each engine start
What controls the engine? - ANSWER-• A two-channel FADEC
• One channel is active and the other channel remains in standby as a backup
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