Card Set Information
APU Start ignition hydraulics PAX systems
Primary function f the APU?
Provide AC elect pwr
Secondary function of APU?
Pneumatic pwr for ATS and A/C packs
What conditions will APU SOV close automatically?
Fire detected, ECU will close SOV
Amber SOV FAIL light on APU PWR FUEL switchlight indicate?
Failed APU fuel feed SOV
What indications seen when the START/STOP switch is pressed for APU start?
Amber START light in switch illum
APU START status msg appears
Prior to 60% RPM, START light & status msg goes out
4 indications seen when APU PWR FUEL switch is pushed?
APU IN BITE msg
APU SOV OPEN status msg
APU gauges appear
APU door opens
Can APU supply bleed air to packs during climb phase of flight?
Only with bleed source selected to MANUAL
Limited to 25,000'
APU starter limits?
3 start attempts in 1 hour
2 minutes between starts
Type of fire protection fot APU?
Dual loop detecrion
One bottle for extinguishing
Isol valve opens
FADEC opens starter valve on assoc eng
Bleed air routed to air turbine starter
White light illum in switchlight
ENGINE start status msgg
Sequence when power lever advanced during start?
FADEC turns on ignition
Monitors engine lightoff
Controls eng accel
With DC pwr only, which eng is started first?
Above what RPM may starter not be engaged?
When will FADEC auto abort the start?
HOT or HUNG start
When are both ignitions activated?
Stall warning computer trip point reached - FADEC activates both ignitions
Starting engine in flight
rudder system powered by which hyd sys?
Describe the AUTO position on HYD 1,2,& 3B?
Causes B pumps to operate when respective bus is powered & flaps not at 0*
How many HYD pumps lost following eng fialure?
1 - the engine driven pump
HYD sys fluid cooled?
Ram-air/oil heat exchanger (1&2)
Purpose of HYD SOV switchlight(s) on overhead pnl?
Closes respective HYD SOV w/out need to shutdown engine
When will PAX O2 auto deploy?
Cabin altitude > 14,000'
What cabin alt does amber CABIN ALT caut activate?
Cabin alt > 8,500' but < 10,000'
When does RED CABIN ALT warning activate?
cabin alt > 10,000'