Forward Overhead Panel 700/800/900
Ground Power and Bus Switching Panel
with associated APU Lights and Indicators
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Click on the control or light for a description of its function.
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Ground Power and Bus Switching Panel
with associated APU Lights and Indicators
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APU GEN (APU Generator) Switch
Three position switch, spring–loaded to neutral.
OFF –
- APU generator powering both AC transfer busses.
- APU generator powering one AC transfer bus; IDG
powering one AC transfer bus.
- Moving a single APU GEN switch to OFF illuminates
related SOURCE OFF light. APU continues to power AC
transfer busses.
- Subsequently moving other APU GEN switch to OFF
disconnects APU generator from tie bus and removes
APU power from the AC transfer busses.
- moving related APU GEN switch to OFF disconnects
APU generator from tie bus and AC transfer bus. IDG
powers AC transfer busses.
(The APU Bus Switches cover two pages).
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