What does the DC service switch power?
Lights (Nav, beacon, service, boarding, toilet and galley dome) Boarding announcement Cabin lighting, upward and downward Service Bus Feed Power Sensing (Service Bus and TRU) Chart Holder Water and Waste Control
What lights will illuminate with the Battery Master ON? (No AC power established)?
Regarding the AC switchlight, what does the illumination of the AVAIL portion indicate?
The system has the correct voltage, frequency and phase
400 HZ, 115 volts, 3 phase
Regarding the IDG guarded switchlight, what does the illumination of the FAULT portion indicate? DISC portion?
Associated IDG has either Low Oil PSI, or high oil temp
The DISC portion indicates that the associated IDG has been disconnected
What does the illumination of the AC ESS XFER switchlight indicate?
AC Bus 1 is not powering the AC ESS BUS
What should a generator be reset?
When directed by the QRH (Example QRH ELEC 12)
Regarding the AUTO XFER switchlight, what does the illumination of the FAIL portion indicate?
The associated GCU (Generator Control Unit) has detected a Bus fault or generator over current
Affected generator is taken offline
GCU inhibits the auto transfer system on the affected side
Associated AC BUS can no longer be powered by the APU or offside
What is associated with the successful fire test?
What is the function of the L/R HYD SOV guarded switchlight?
To interrupt the flow of hydraulic fluid to the associated EDP (Engine Driven Pump)
Regarding the L or R Boost pump, what does the INOP portion of the switchlight indicate? The ON portion?
2. The pump outlet PSI is satisfactory (ON)
What does the FAIL portion of the GRAVITY XFLOW switchlight indicate?
The gravity crossflow valve is not in the commanded position
Regarding the L or R XFLOW switchlight, what does the FAIL portion of the switchlight indicate? The ON portion?
Explain the function of the XFLOW AUTO OVERRIDE switchlight, Pressed IN/OUT?
WING A/I CROSS BLEED rotary switch
BLEED VALVES rotary switch
BLEED SOURCE rotary switch
PWR/FUEL switch (APU)
PUMP FAIL portion of the switchlight illuminates (APU)
indicates a failed APU pump
SOV FAIL portion of the switchlight (APU)
Indicates APU SOV not in the commanded position
START/STOP switchlight
L/R START switchlight
STOP switchlight (APU)
Discontinues the start sequence by closing the ATS (air turbine starter) valve on the associated engine
CONT switchlight
Engages the continuous ignition
Toggle switch 1 (1B)