Overhead Panel Flashcards
What does the DC service switch power
Lights; (NAV, Beacon, Service, Boarding,
Toilet, Galley Dome)
W/no AC PWR, SERV BUS is powered by APU BATT BUS via Service Bus contactor
- SERVICE CONFIGURATION message appears on DC Synoptic page
- Service Bus contactor not represented on DC Synoptic page
What lights will illuminate with the Battery Master on
AC ESS XFER "INOP" L/R boost pump switch lights "Fault" portion PRESS CONT switchlights "OFF" portion L/R PACK switch lights MACH TRIM switch light
Regarding the AC switchlight, what does AVAIL mean
System has correct volts, frequency, phase
IDG swithlight, what does the FAULT/DISC portion indicate
IDG has low oil pressure, or high oil temp
DISC; associated IDG is disconnected
AC ESS XFER light indicate
AC Bus 1 is not powering the AC ESS Bus
When should a Generator be reset
When directed to by QRH
AUTO XFER FAIL switch light indicates
GCU (GEN CONTROL UNIT), detected bus fault or
GEN overcurrent
Affected GEN taken offline
GCU ihibits auto transfer on affected side
Associated AC Bus can’t be powered by APU or offside
What is associate with successful FIRE TEST
FIRE SYS OK LH/RH ENG and APU FIRE PUSH LH/RH, APU BOTTLE Armed push to discharge Both MASTER WARNING FWD/AFT CARGO SMOKE push to discharge Cargo BOTTLE ARMED push to discharge lights illuminate
What is the function of the L/R HYD SOV
guarded switchlight
Stops flow of Hydraulic fluid to associated (EGP)
Engine Driven Pump
L/R Boost Pumps, what does the INOP/ON portion indicate
Pump outlet psi is to low,
Pump outlet psi is satisfactory
What does the FAIL portion of the Gravity Crossflow
indicate
Gravity crossflow valve not in commanded position
L/R Crossflow switchlights, what does FAIL/ON indicate
Respected Crossflow SOV is not in
Commanded position
ON crossflow pump energized, fuel directed to
low tank
XFLOW AUTO OVERRIDE switchlight IN/ON
Pressed in arms crossflow pump for manual use
Pressed out pump is disarmed for manual use and
auto Crossflow is available (Switch not illuminated)
Wing A.I. Cross Bleed rotary switch
From Left, Right anti-ice valve is closed and bleed is is drawn from the L. ENG for both wings
From Right, Left anti-ice valve is closed and bleed air is drawn from the R. ENG for both wings
Bleed Valve Rotary Switch
AUTO - Automatic Operation of the Bleed valves
CLSD - Closes valves
Manual - Allows for manual operation of valves
controlled by ACSC ISOL toggle switch
CLSD - allows valve to open automatically when
APU LCV is opened during crossbleed starts
and cycle open/closed during auto transfer of bleeds
between APU and ENGs.
OPEN - allows for manual operation of valve in conjunction with BLEED VALVE rotary switch.
BOTH ENG - L/R bleed valve is open if both are capable of supplying bleed air, APU LCV is closed.
L or R ENG selected; selected ENG is supplying bleed
air if able, and the APU LCV is closed.
APU PWR FUEL Switch
Pressed, ECU is powered:
APU BITE status message
APU SOV OPEN status message
Air inlet door opens
APU RPM/EGT displayed on EICAS status page
Fuel pump comes on
