Electrical System & associated malfunctions/Emergencies Flashcards
The electrical system includes a ____VDC, ____amp starter/generator, an aerobatic ____VDC, ___amp lead acid battery, a _____VDC, ____amp auxiliary battery, and an external power receptacle.
28 VDC, 300 amp
24 VDC, 42 amp
24 VDC, 5 amp
True/False: Primary aircraft power is provided by the battery
FALSE; provided by generator function of the starter/generator
Does the generator have enough power to operate all equipment on both buses & charge the battery?
Yes
How many volts are required for the generator to charge the battery?
25 volts
Can both generator switches be in the ON position at the same time?
No, they are electrically interlocked
How can the generator be reset in-flight?
Pressing the generator reset button
If the red GEN annunciator illuminates, what equipment is automatically shed?
Air conditioning
The battery provides power for _______ & is capable of powering all electrical systems except air conditioning.
Engine starts
Where is the auxiliary battery located?
Left avionics compartment
What instruments are powered by the auxiliary battery & for how long?
a. Standby instruments, standby instrument lighting, backup UHF control, & FIRE 1
b. 30 minutes
True/False: Excessive radio transmission with only the auxiliary battery available will reduce available battery time.
TRUE
External power is distributed on the _________ bus & controlled by the _______ switch.
Battery; Battery
Do not connect external power if battery voltage is below _____ volts.
22.0 volts
With BUS TIE in NORM position, the ______ feeds both generator & battery bus items.
Generator
If the bus tie fails or is set to OPEN, the amber ___________ annunciator will illuminate & separate both the battery & generator buses.
BUS TIE
With the BUS TIE open, how long will the battery power battery bus items?
30 minutes
What happens to the cockpit pressurization when the battery bus is lost?
It will depressurize
Will the OBOGS work once the main battery is depleted?
No, it will be inoperative
If the battery bus fails, how long/accurate will the standby attitude indicator last?
±6°; 9 minutes
What items are located on the HOT Battery bus?
a. “FOCBEER”
b. FDR Maint, OBOGS, Clock, Battery switch, Emer flaps, ELT, Ram air valve
What are the generator limits for amps in flight?
+50 to -2 Amps
What are the Ground/inflight voltage generator limits?
28.0 to 28.5 Volts
What should the aircrew do if generator voltage is continuously below 25.0 volts?
Land as soon as practical
What are the ground power requirements?
a. 28 to 28.5 VDC
b. 1,000 amps for 5 seconds
c. 500 amps for 2 minutes
d. 300 amps continuous
