What was found
APU FAULT LIGHT ILLUMINATED AFTER START ATTEMPT. SELECTED APU SWITCH OFF THE FAULT LIGHT WENT OUT. ATTEMPTED A SECOND START WITH THE SAME RESULT. FAULT LIGHT ILLUMINATED. GROUNDED - YES. REPLACED APU SCU. REF B737-9 AMM 49-41-61.
- Difficulty date
- May 19, 2023
- Submitted
- May 23, 2023
- Operation
- Air carrier
- Aircraft
- N972AK
- Make and model
- Boeing 7379
- Aircraft serial
- 43389
- Aircraft time
- 4,657 hours, 1,337 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Starter
- Part number
- 51090360001
- Part serial
- 5109036001163
- Condition
- Faulty
- Location
- E/E Bay
- Part time
- 4,708 hours, 1,349 cycles
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.