Electrical System (CSG) Flashcards
Electrical System
What are the electrical power generating sources on the U-28 Trainer?
Battery, Gen 1, Gen 2, EPS Battery
AOH Vol 2, Section 15
Electrical System
During flight, the BUS TIE is normally _______ (closed/open) and the GEN 2 TIE is normally _______ (closed/open)?
Closed, Open
AOH Vol 2, Section 15
Electrical System
What buses does GEN 1 normally power?
Gen 1, AV 1 and 2, Battery, non-essential, power line
AOH Vol 2, Section 15
Electrical System
What does the MASTER POWER switch do?
Enables all electrical power (except EPS batt) to be switched OFF
AOH Vol 2, Section 15
Electrical System
What bus powers the STBY BUS when power is first applied (Engine not running)?
Battery Direct
AOH Vol 2, Section 15
Electrical System
What items are on the Battery DIRECT bus?
Clock, 50% dome light, cargo door motor, Baggage comp light, Standby Bus
AOH Vol 2, Section 15
Electrical System
The Emergency Power System (EPS) battery provides power to the _________________ for approximately _____ minutes after loss of all other electrical power?
Pilot and Copilot standby instruments and associated lighting, 30
AOH Vol 2, Section 15
Electrical System
When testing the EPS battery, hold the test switch for _____ seconds. What status does the green light indicate?
3 seconds, EPS is properly charged (80% of rated capacity)
AOH Vol 2, Section 15
Electrical System
Minimum main battery voltage for engine start is _______ volts.
24
AOH Vol 1, Chapter 2
Electrical System
When the BATTERY CAWS illuminates, what condition(s) exist?
Amp draw more than 60, or overvoltage
AOH Vol 1, Chapter 3
Electrical System
In the case of an engine failure or double generator failure the 26V Lithium Ion battery will supply essential electrical systems for at least ____ minutes if the load is reduced below ____ amps.
30, 80
Engineer Assessment from test data
Electrical System
With the STBY switch in the OFF position, what bus provides power to the STBY
bus?
AV 1
AOH Vol 2, Section 15
Electrical System
IAW AOH Vol 1, Chapter 2 Normal Procedures, when external power (GPU) is connected, VDC should be between _____ and _____ volts. The external power control unit on the aircraft will disconnect the GPU if the output voltage is less than ______ VDC or greater than ______ VDC.
27, 29.5, 25, 29.5
AOH Vol 2, Section 15
Electrical System
Generator #1 is rated at _______ AMPS and can extend to _____ AMPS for 2
minutes.
400, 470
AOH Vol 1, Chapter 5
Electrical System
Generator #2 is rated at _______ AMPS with a max desired load of ______ AMPS
115, 90
AOH Vol 1, Chapters 2 and 5
Electrical System
If Generator #1 goes off-line, the ______________ bus will be auto-shed.
Non-Essential
AOH Vol 1, Chapter 3
Electrical System
(T/F) After any generator failure, do not fly in icing conditions.
True
AOH Vol 1, Chapter 3
Electrical System
(T/F) After a GEN 1 failure that does not reset, landing gear will need to be lowered
via the Landing Gear Emergency Extension procedure.
True
AOH Vol 1, Chapter 3
Electrical System
The AP, Wx Radar, EGPWS, TCAS, FMS, and GNS-430 #2 receive power from the
_________ bus.
AV 2
AOH Vol 1, Chapter 3
Electrical System
When the CAWS AVIONICS BUS WARNING and voice callout are heard, the
affected Avionics bus voltage has dropped below ________ volts.
22
AOH Vol 1, Chapter 3
Electrical System
What does the NON ESS OVRD switch do?
Switches power supply to NESNTL Bus from Gen 1 to Battery
AOH Vol 2, Section 15
Electrical System
What does the inverter switch do and what systems need AC power?
Switches AC inverter pwr supply between Gen 1 bus and Batt bus; synchro references-avionics: AP, EFIS, Nav Conv, AHRS
AOH Vol 2, Section 15
Electrical System
In the U-28A Trainer aircraft, what items are on the Mission Bus?
PRC Radio, Aft Audio Control Panels
AOH Vol 2, Section 15
Electrical System
If the BUS TIE and N ESNTL BUS CAWS lights illuminate, the Bat Power Bus has demanded more than ______ Amps across the bus tie.
220
AOH Vol 1, Chapter 3
Electrical System
What items are on the Power Line Bus?
Flaps, Hydraulic pump, VCCS, WS heat and probes de-ice
AOH Vol 2, Section 15
Electrical System
List some items that are lost when the CAWS ESNTL BUS light illuminates with voice callout “Warning, Essential Bus Battery” ___________________________
Aileron Trim,
Air/Ground System,
AOA plate heat,
ECS,
Engine Start,
Fire Detect,
LH fuel pump,
ICS,
Fuel Quantity (analog),
RH Landing light,
Wing inspection light,
Main Pitch Trim,
Prop Fx,
Stick pusher
