What was found
DISCREPANCY: APU WON'T START. CORRECTIVE ACTION: ACCOMPLISHED BFCU BITE TEST PER 24-20 FT 814. FOUND FAULT "EXT PWR PIN E-F FAILURE". RESET AND OPS CHECKS GOOD. ACCOMPLISHED APU STARTING PROCEDURES PER AMM 49-11-00, OPS CHECK GOOD.
- Difficulty date
- July 3, 2021
- Submitted
- July 13, 2021
- Operation
- Air carrier
- Aircraft
- N351CM
- Make and model
- Boeing 767323
- Aircraft serial
- 25451
- Aircraft time
- 104,001 hours, 18,197 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Apu
- Condition
- Malfunctioned
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.