Service difficulty report · Fault Light · Boeing 737990ER

Difficulty date
June 15, 2019
Submitted
June 17, 2019
Operation
Air carrier
Aircraft
N433AS
Make and model
Boeing 737990ER
Aircraft serial
41704
Aircraft time
22,203 hours, 7,248 cycles
Part
Fault Light
Condition
False Activation
Location
Apu
Stage of operation
NR
How discovered
O
Nature of condition
N
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

APU FAULT LIGHT ILLUMINATED AFTER ATTEMPT TO START. GROUNDED - YES. COMPLIED WITH BITE CHECK ON APU SYSTEM. NO CURRENT FAULTS NOTED. FAULT HISTORY SHOWS FAULT CODE 49-21015 OVERTEMPERATURE SHUTDOWN. FAULT CODE IS NO LONGER ACTIVE. APU OPERATES NORMALLY. APU FAULT LIGHT NOT ILLUMINATED. SEAMC JEREMY NOTIFIED.