Systems 2 Flashcards
Electrical Systems and its Malfunctions
What are the primary sources of electrical power? (3)
Aircraft battery, Starter-Generators, and external Ground Power Unit
With the battery switch in EMERGENCY, the aircraft battery powers:
The Emergency Bus
The R GEN OFF annunciator illuminates. What action may return the generator online?
A. Cycle the GEN RESET switch momentarily to RESET then to OFF
B. Cycle the GEN RESET switch momentarily to RESET then to NORM
C. Cycle the GEN RESET switch momentarily to OFF then to NORM
D. Cycle the generator MASTER switch momentarily to EMER then to NORM
B. Cycle the GEN RESET switch momentarily to RESET then to NORM
Minimum battery charge for a battery start is ______ volts
22
During a battery start, what is the maximum AMPS on the operating generator for starting the second engine?
150
You have lost one generator at 38,000 MSL. What is the maximum AMPS on the operating engine?
280
The standby bus is normally bowered by the _______.
Left load bus
The aux battery is located _______
avionics rack
The standby power switch and indicator lights are located on the _________ panel
Center Instrument
The aux standby and standby buses distribute power to the following essential aircraft equipment: (7)
- AHRS
- Aux ADC
- Standby instrument module
- MFD (with engine instruments)
- UHF Radio
- Left RTU
- Audio Hub and copilot’s audio control panel
The standby battery is capable of powering which bus/buses?
Standby bus only
Under what conditions will the amber ON indication illuminate on the standby power switch light?
The standby battery is the only source powering the standby bus
What are the first indications of a right generator failure?
The amber MASTER CAUTION RESET switch lights flash and the amber R GEN OFF annunciator light illuminates
If the right generator fails, what will the DC voltmeter read when the voltage selector switch is in the RH GEN position?
Zero (0)
If you are unable to reset a failed generator, maintain N2 at a minimum of ________% on the engine with the operating generator
58
If the right generator has failed while cruising at FL350, what is the maximum permissible load on the left generator?
280 amps
What indications are present if the number 2 inverter fails?
The MASTER CAUTION RESET switchlights flash, the INV 2 FAIL annunciator illuminates, the NO 2 INV 26V and 115V voltmeter positions read zero
The BATTERY FDR FAIL light, the BATT CUT OFF, and EMER BUS FDR FAIL annunciators are illuminated. What should you do if switching the battery OFF then ON does not correct the condition?
Turn the battery off and land as soon as practical.
What does illumination of a BUS FDR FAIL annunciator indicate?
That power is flowing through Feeder 3 (the standby feeder)
The L BUS FDR FAIL annunciator illuminates. What happens if the standby feeder subsequently loses power?
The annunciator extinguishes. The DC POWER LH BUS FDR NO 3 Circuit Breaker may be open
How many times can you reset a popped BUS FDR circuit breaker?
None
When does the red CABIN SMOKE Switchlight illuminate?
When the system detects smoke in the aft part of the cabin?
What do wisps of smoke and an acrid odor near an avionics rack indicate?
A possible electrical fire
When smoke and fumes are present with an electrical fire, what should you do first?
Don Oxygen masks and select 100% oxygen
During the initial portion of the Electrical Fire Checklist, the crew places the master generator switches to EMER and places the battery switch to OFF. At this point, what electrical bus/buses are powered?
The aux standby and standby buses
