Powerplant For A220 Flashcards
The A220 is powered by what?
Two Pratt & Whitney PW1500G series High-bypass turbofan engines. For Breeze: PW1524G. The 24 means 24,000 lbs
N1 drives the high bypass engine fan through what?
fan drive gear system
What does the Fan Drive Gear System mainly do?
Through a series of gears, reduces the fan speed to 1/3 of the N1 rotation. . This increases engine efficiency and allows both sections to operate at their optimum speeds.
Two important functions of the engine fan?
- Provides the first stage of air compression.
2. Generates approximately 80% of the total engine thrust.
What provides constant de-icing for the inlet cone and cover?
Engine bleed air.
What engine accessories are mounted on the main gearbox?
How are the FADEC and the Electronic Engine Control(EEC) powered?
28VDC from the Permanent Magnet Alternator Generator(PMAG)
What is the minimum power output that is required, for the PMAG, to power the EEC?
10% N2
When the PMAG power is unavailable, what power automatically powers the FADEC and EEC?
DC ESS BUS
What happens when the Starter Air Valve(SAV) is commanded open?
The Air Turbine Starter(ATS) rotates the N2 high-pressure shaft through the main gearbox.
Describe the ATS, it’s functions, and what it provides air for!!
How would One abort an engine start?
Setting the L or R ENG switch to OFF.
Understand the Automatic Start Sequence:
What does the EICAS message: ENG START DELAY mean?
Anytime an engine start is initiated outside of the envelope of the Altitude/Outside Air Temperature Graph, which is a motor time of 30 seconds.
When starting engines what controls fuel flow?
L or R ENG switches.
The ignition system
Oil system heat exchangers
Bleed Air System:
Thrust Reverser system:
Thrust Limitation at Low Speed(TLLS)
Thrust mode transitions:
T/O Thrust modes:
Climb thrust settings:
Thrust modes:
