Power Sources Flashcards
Annunciator lights (except for. ) and Master Reset Button
MEDC
SHP
TIT
RPM
FF guages
MEAC
SEAC
Tach Gen
BUS A
Turbine inlet overtemp test switch
Cal A / B Switch
Duct loop test switch
SEAC (just below the SEAC TIT guages)
MEAC (toggle switch = AC)
EMDC (anything duct = EMDC)
Baro Alt Mode C and HSI Mode Lights
MEAC
Turn Needle
MEDC
backup = FEDC with ESS BUS MON switch OFF
Marker Beacon Lights
And baro alt. Vibrator
MEDC
OAT Guage
EMDC (because its outside the plane)
Stby Attitude Indicator (Peanut Gyro)
FEAC
backup = FEDC with ESS BUS MON switch OFF
RADALT
FEAC
Landing gear handle lights and position indicator
EMDC
Flap Position Indicator
Inst Bus 1
EFDI
MEAC backed up by FEAC
AOA Index lights and annunciator
MEDC
Pedestal
overhead lights
Overhead instrument lights
MEAC
Step lights
Circuit breaker lights and FE’s Reading light
BUS A
28v FLB
AP (primary / control)
BUS A / MDC
Rack C-1/2
Command Bell
FEDC
Landing lighted and windshield wipers
MEAC
Taxi, wheel well, wing and tail lights (Nav lights)
28v FLB
Strobe
B: Bus B (primary)
E: EMDC (control)
APU Control Switch & Inflight arming switch
GOB
- APU Exhaust Gas Indicator
- RPM APU Indicator
- Lights Test Switch
- Thermocoulpe
- APU Tach Gen
- APU Ess DC
Pilot / CP lighting control panels
Reference the cross picture (YouTube video)
Fuel dump Pump
Valve?
BUS A / MDC
MDC
Pitot heat switch (pilot and cp) (and heaters)
FEAC (pilot)
MEAC via 28v FLB (cp)
Empennage de-ice. Control switch and wing de-ice mod valve control switches
EMDC
Emp de-ice fault guage
BUS A and BUS B
Propeller De-ice guage
Bus B
Leading edge temp guage and ice detector heater
MEAC
Side windshield heat control switches (primary / control)
Front windshield heat power
BUS A
EMDC
MEAC
(Control relay power = MEDC)
AOA Heat Power
MEDC
Empennage Deice, side windshield heat and prop deice control relays
EMDC
Wing deice mod valves
EMDC
Emp cycling strips and parting strips
BUS B
BUS A
Prop Deice Heating Power
BUS B
Emp Deice Timer Motor
Engine anti ice valve solenoids
MEAC
MEDC
Engine oil system instrument panel
EIEII, 1221
(EMDC, Inst Bus #1 or #2)
Oil quantity guages control power = GOB
Ground AC switch (primary / control)
SEDC / MEDC
Temperature selector, controller and indicator
MEAC
Pressurization ground check switch
MEAC & FEAC
Outflow valve
FEAC
Heat exchanger fans (primary / control)
blows me
BUS B / MEDC
EDC Dump & Disconnect Solenoids
MEDC
Cabin Exaust Fan (primary / control)
Blows em
Bus B / EMDC
Aux Vent Valve (primary / control)
MEAC / MEDC
APU Load and shutoff valve
GOB
APU Air Override Switch
MEDC
Air Multiplier Valve
MEAC
2 & #3 EDC Inlet & Discharge Pressurization indicators
2: Inst Bus 1
3: Inst Bus 2
NTS FX valve check switch (in NTS check)
EMDC
NTS FX valve check switch (in fx valve check)
MEDC
Prop Power Sources
- BAAB
- MEEM
B = prop feather pump #1 (and alternate)
A = prop feather pump #2
A = prop feather pump #3
B = prop feather pump #4 (and alternate)
(BUS A/B)
M = Feather Valve Solendoid, Air Start Control Relay and Prop Feather Pump Relays #1 E = #2 E = #3 M = #4 (MEDC/EMDC)
Autofeather System
EMDC
Flight idle stop relay and solenoids
MEDC
Fuel Gov & Prop Pitchlock Switches (primary / control)
BUS A / EMDC
Oil Cooler Flap Control Switches
MEAC
TD Switches (primary / control)
MEAC / SEDC
Hydraulic System 1 & 2 px indicator
Sys 1: Inst Bus 1
Sys 2: Inst Bus 2
Hyd pump switches (primary / control)
BAB MEE
B = hyd pump 1A
A = hyd pump 1
B = hyd pump 2
(BUS A/B)
M = hyd pump 1A
E = hyd pump 1
E = hyd pump 2
(MEDC/EMDC)
Hyd Pump 1B
GOB
Hyd system quantity indicator
EMDC
Forward & Aft Transfer Pump Switch control power
EMDC
Fuel Boost Pumps control power
EMDC
Crossfeed Valve Switches and Fuel Cross Ship Valve Switch
N/A
Fuel Crossfeed Px Indicator primary power
Inst bus 2
Fuel gauge test switch
EMDC
Fuel quantity guages and totalizer (fligh station)
MEAC
Fuel quantity guages (refueling panel)
BUS A
Fuel transfer control switch
Valve?
EMDC
MDC
Main tank valve switches
MEAC
Aft Transfer Pump (primary / control)
Forward Transfer Pump (primary / control)
BUS B / EMDC
BUS A / EMDC
Crossfeed & Main Tank Valves
MEAC
Fuel Boost Pumps 1 & 3
Fuel Boost Pumps 2 & 4
BUS A / EMDC
BUS B / EMDC
APU GEN OFF & EXT PWR SWITCH
GOB
BUS A MON switch
BUS B MON switch
ESS BUS MON switch
PMG via MEDC
PMG via MEDC
BUS A
Inverter & Bat test switch
FEDC
Full Load Monitoring
GOB
Load Monitoring Relays
MDC
Electrical Power CB’s (Powered by MEDC)
- APU ESS BUS FEEDER
- BUS A CNTL
- BUS B CNTL
- GEN 4 TRANS CNTL
- Power sensing
Electrical Power CB’s (Powered by GOB)
Ext pwr control
Electrical Power CB’s (Powered by FEDC)
GEN 4 AUX CNTL
Inverter Power
Inverter Relay
Ground bus relay
Gen 4 control aux relay & power sensing relay
MEDC
Ground op bus relay & inverter relay
FEDC
Inverter
SEDC
Transfer relay 2a and 2b
2a: 2 PMG
2b: MEDC
Transfer relay 3a and 3b
3a: 3 PMG
3b: MEDC
Transfer relay 4
GOB
Transfer relay 5 (primary / control)
MEDC via Gen 4 Trans cb/ GEN 4 Trans cb
Transfer relay 6 (primary / control)
MEDC via Gen 4 Trans cb / Gen 4 Trans cb
Transfer relay 7
FEDC
TR 1, 2, 3
BUS A
BUS B
MEAC
Aft Lighting Bus
BUS B
APU ESS DC (Primary / Control)
MEDC / GOB
SAM Bus Essential DC Feeders, FWD lighting bus, Inst Bus 1 & 2
MEAC
No Name Bus (primary / control)
MEAC / FEAC
SEAC
SEDC
MEAC / SEDC via inverter
MEDC / FEDC via inverter
Engine start control panel
SEDC
Fire detection and extinguishing panel and warning detector switches
MEDC
HRD’s alt power = EMDC
IFF
FEDC
Rack H-1/2
RAWS
MEAC/MEDC
Rack B-1/2
VHF NAV Recievers
MEAC/MEDC
Rack B-1/2
HF Reciever Transmitter
MEAC/MEDC
Rack B-3
TAS Computer
MEAC/MEDC
Rack C-1/2
TACAN Reciever Transmitter
MEAC/MEDC
Rack C-1/2
Synchrophaser
Bus A
Rack C-3
RINU G’s (1 and 2)
1: MEAC/
2: Bus A/
Rack H-1/2
UHF Reciever Transmitters (1 and 2)
1: MEAC/MEDC
2: BUS A/MDC
Rack F-1
VHF/UHF Reciever Transmitter
MEAC/MEDC
Rack J-1/2
