Electrical Flashcards
Where is the list of aircraft systems affected by load shedding displayed?
The Electrical synoptic
What provides backup power for flight controls to assure positive control during temporary power interruptions?
Dedicated batteries.
When the TOWING POWER switch is placed in the ON position, what is energized?
The main and APU batteries energize only equipment essential for towing operations:
Captains ACP, flight inter phone, dome light, aisle lights, nav lights, brakes (no radio)
What provides standby power until RAT deployment when all elec power to flight instruments is lost?
The main battery
What is the first action to access the aft external power source
Connect both forward external power sources.
What does the forward external system provide power for?
General ground ops
If the APU is not available. What can be used for engine start?
Minimum of two 90kVA rated forward external power sources.
What is the location of the RAT Ram Air Turbine Switch
Hydraulic Panel
The RAT serves as an emergency source for…
Electric and hydraulic power
In flight, what causes the RAT to deploy automatically?
Both engines failed, all 3 hydraulic system pressures low, loss of elec power to flight instruments, loss of all four EMPs and faults in the flight control system occur on approach, or loss of all four EMPs and a engine fails on TO or Landing.
How many primary batteries?
Two
How many PMG permanent Magnet Generators?
3
Permanent Magnet Generators PMG are the primary power source for what system?
Flight Control electronics
What is the primary power source for the EEC Electronic Engine Control?
Permanent Magnet Alternators
How many Permanent Magnet Alternators exist?
Two, one per engine.
