Flashcards in Powerplant Deck (34)
What is the CRJ-900 Powerplant model number?
General Electric CF34-8C5
What is the thrust rating without APR / with APR?
13560 lbs / 14,750 lbs
What is the Max ambient air temperature for takeoff and landing?
ISA + 35c
What is the Min ambient air temperature for takeoff and landing?
What is the Max Altitude for a windmill start?
21,000 ft MSL
N2 for start?
Max engine to engine N2 split at ground idle power?
How much of the thrust is produced by core air?
How much of the thrust is produced by by-pass air?
How many stages of compression do we have?
Engine has a 10 stage axial flow compressor
What accessories are driven off the N2 accessory gear box?
Engine driven fuel pump, IDG, Air turbine Starter, engine driven hydraulic pump, oil pump, FADEC alternator
What is the engine bleed air used for?
Engine start, air conditioning, pressurization, wing and cowl anti-ice
What stages of bleed air are used?
normally 6th stage, 10th stage used when demand exceeds capability of the 6th stage
What allows 10th stage bleed air availability?
Air Conditioning System Controller(ACSC) automatically opens the High Pressure Valve(HPV)
How many igniters are installed on each engine?
Two, IGN-A, IGN-B
What are the required parameters before fuel is introduced during a ground engine start?
20% or greater N2, ITT < 120c
When will APR arm on takeoff?
Engine speed within 8% of scheduled takeoff power, normal or flex
How can you determine if the APR system has armed?
APR ARMED advisory message
When will the APR system activate?
Thrust levers in TOGA, normal or flex thrust scheduled, N1's differ by 15% or greater or when thrust levers set in the MAX POWER detent
What occurs when the APR system activates?
FADEC commands an N1 speed increase dependent on thrust lever position
What indication will we have of APR activation?
Green APR icon on operable engine N1 gauge
If an engine fails during a go-around, will the APR system activate?
What system is used to deploy and stow the thrust reversers?
How are thrust reversers deployed?
Thrust levers must be at idle. The reverse thrust levers are raised by engaging the thrust reverse release triggers. A solenoid lock stops reverse thrust lever movement while the reversers deploy. Once deployed, the solenoid lock releases allowing N1 to increase with the thrust reverse levers
What is occurring during thrust reverser deployment?
The translating cowls move aft. The bypass air is redirected through cascade vanes which redirect the air forward
What indications will be seen with normal thrust reverser deployment?
Green REV icon on N1 gauges
What happens when a thrust reverser inadvertently deploys?
FADEC commands reverser to close and thrust set to idle on affected engine
What are the indications of an inadvertent thrust reverser deployment?
Amber REV icon on N1 gauge. REV UNLOCKED caution message
What is the normal air source for engine starts?
APU or cross bleed if doing a single engine taxi