What was found
APU FAULT LIGHT WHEN TRYING TO START APU. GROUNDED-YES. REF B737-900 AMM 49-15-41/401 REMOVED AND REPLACED APU AIR INLET DOOR POSITION SWITCH. OPERATIONS TESTS NORMAL.
- Difficulty date
- November 19, 2020
- Submitted
- December 2, 2020
- Operation
- Air carrier
- Aircraft
- N464AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 40714
- Aircraft time
- 25,275 hours, 7,955 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Switch
- Part number
- 2EN19RB
- Condition
- Faulted
- Location
- Apu
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.