737 Operations Manual
Non-Normal Checklists -
Engines, APU
Copyright © The Boeing Company. See title page for details.
D6-27370-400E-TBCE NNC.7.3
APU OVERSPEED
Condition: The APU OVERSPEED light illuminated indicates one
of the following:
• APU RPM limit has been exceeded resulting in an automatic shutdown
• the overspeed shutdown protection feature has failed a self-test during a
normal APU shutdown
• an APU start has been manually aborted prior to the APU reaching
normal operating speed.
APU SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .OFF
Note: If the OVERSPEED light illuminated due to an RPM
limit being exceeded, the APU OVERSPEED RESET
switch in the E/E compartment must be reset before
another APU start can be attempted.
June 08, 2001
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