Power plant Flashcards
Which engine is installed?
IAE V2500-A5 (CEO)
CFM LEAP 1-A (NEO)
What is the thrust output of the engine?
27.000 lbs
What are the components of the LP stage?
CEO - Single stage fan - 4 stage LP compressor - 5 stage LP turbine NEO - Single stage fan - 3 stage LP compressor - 7 stage LP turbine
What are the components of the HP stage?
- 10 stage HP compressor
- 2 stage HP turbine
Which rotor is connected to the accessory gearbox?
N2
Which aircraft components are driven by the AGB?
- Engine driven hydraulic pump
- Engine generator
- Engine fuel pump
- Engine oil pump
- Air starter
- FADEC alternator
How is the FADEC powered?
By aircraft power for 5 min on startup, then shutdown. Dedicated alternator >10% N2
What are the three idle modes?
- Modulated idle (Minimum idle)
- Approach idle
- Reverse idle
When is approach idle selected?
In flight with:
- Config 3 or Full
- Landing gear down
How many igniters are used for automatic start?
One
When will the ignition turn on/off in the automatic start sequence?
CEO On - After dry crank sequence Off - 43% N2 NEO On - Approximately 20% N2 Off - 55% N2
What is the effect on thrust of FADEC reverting to degraded N1 mode?
N1 is defined as a function of TLA only, overboost can occur.
How many igniters are used for a manual start?
2
When is ignition automatically selected on?
- Engine A/I on
- TO/GA or FLEX selected
- EIU failure
- Approach idle selected
- In flight sub-idle or surge
- Engine master switch cycled ON-OFF-ON
At what engine speed will the start valve close?
43% N2
What faults will the auto start system abort for?
CEO - Hot start - Hung start - Stall - Wet start NEO - Hot start - Hung start - Stall - Wet start - EGT overlimit - Starter time exceeded - Low start air pressure - Failed bowed rotor protection - TL not at idle - Starter shaft shear
What is the max EGT during starting?
635°C
How are the thrust reversers actuated?
Hydraulically
What is the maximum continuous oil temperature?
155°C
What is the minimum oil temperature for start?
-40°C
What is the max starter duty cycle?
CEO - 1 cycle is one start attempt - 15 second pause between cycles - 30 minute cooling after three cycles NEO - 1 cycle is three start attempts - 60 second pause between cycles - 15 minute cooling after three cycles
Will the manual start sequence be aborted by the FADEC for start faults?
No
When do the pack valves close during the automatic start sequence?
When ENG MODE is selected to IGN/START
When does the start valve open during the automatic start sequence?
When ENG MASTER switch is selected to ON
What is the time limitation for operating with TOGA thrust?
2 engines - 5 minutes
1 engine - 10 minutes
What is the minimum oil temperature for takeoff?
50°C
