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 onPUMP FAIL illuminates
APU Pump failed
SOV FAIL illuminates
APU SOV not in commanded position
APU START/STOP Switch
Ignition activates Starter motor energized Fuel Shutoff valve opens Start switch illuminates APU START message is displayed
L/R ENG START switchlight
Pressed in, isolation valve opens
Associated starter valve opens
START switchlight illuminates
L or R ENGINE STARTER status message displayed
STOP switchlight
Discontinues start sequence by closing ATS,
Air Turbine Starter
CONT. Ignition switchlight
Engages continuous ignition
Hydraulic Toggle Switches
1 (1B): Auto, allows 1B to operate when perspective bus is powered and 1 GEN is online and Flaps out of zero.
ON, allows pump to operate when perspective bus is powered and 1 GEN is online regardless of Flap position.
OFF, pump is off
3A: ON, allows operation of AC Motor Pump 3A
OFF, pump os off
3B/2: “Same as 1B”
LDG ELEV control knob
Pre-selects a landing elevation
MAN ALT control switch
Manual - control of cabin pressure
UP/DN - commands climb/descent
HOLD - holds selecte altitude
EMER DEPRESS guard switch
Pressed, DC motor will open outflow valve and depressurize the aiplane
PRESS CONTROL switchlight
Pressed allows outflow valve to manually operate with
MAN RATE toggle and rotary switch
(MAN portion of switch illums)
Fault portion illumiates, Both pressuritaion controlers have failed
MAN RATE rotary switch
When Manual Mode selected, controls rate of change in cabin altitude
PACK switches L/R
L/R pressed supplies air to the flight deck and main cabin perspectively through the mixing manifold.
FAULT portion:
indicates over temp or over pressure condition
OFF portion:
means just that
RECIRC toggle switch
ON: energizes both recirculation fans
OFF: means just that
RAM AIR guarded switch
OPEN: allows air from the ram air scoop into the mixing manifold, provides vetilation to the aircraft
(Switchlight Illuminates)
L and R MAN switches
Allows Manual control of airflow through the PACK by directed actuation of the temperature control valve
HOT/COLD toggle switch
Controls temperature when in manual mode
CKPT and CABIN rheostat control knobs
Allows auto temp control through ACSC mixing hot/cold air
allows pre-selected temperature for the aircraft flight deck and cabin
CARGO switch (3 positions)
- OFF: Closes intake and exhaust SOVs to seal AFT cargo bay
- AIR: SOVs open to allow recirculated or conditioned air in AFT cargo bay
- COND AIR: Provides automatic temperature control of AFT cargo bay using electric heater.
WING toggle switch
ON: (AILC) Anti-ice leak detection controller modulates the wing anti-icing vavles
White N2 arc appears 0-77%
COWL LH/RH toggle switches
Allows cowl anti-ice SOVs to open provideing bleed air into leading edges of cowls via piccolo tube
ICE DET TEST switchlight
Provides 3 separate functions
-Tests Ice Detectors circuitry and probes
-Tests Probes and sensor heaters
-Switch will illuminate w/wing or cowls ice off along
w/ICE caution message
WSHLD LH and RH toggle switches
Low: All 4 panels are heated to 24C
High: Windshields are heated to 41C
WSLD TEST button
Initiates a self test of windshield heating system.
L/R WSHLD HEAT and L/R WINDOW HEAT caution message is Good Test.
PROBES toggles switches
ON: On ground w/AC power, TAT and probe bases are off
Static and AOA are heated
Pitot heads are heated
