What was found
FAILURE IN THE BACKUP ELECTRICAL SYSTEM HAS OCCURRED THAT CANNOT BE ATTRIBUTED TO A BACKUP GENERATOR. REPLACED GEN BACKUP CONVERTER, ALL TESTED NORMAL. REPLACED GENERATOR BACKUP CONVERTER, ALL TESTS NORMAL. SUCCESSFUL ENGINE RUN TEST.
- Difficulty date
- July 8, 2012
- Submitted
- July 13, 2012
- Operation
- Air carrier
- Aircraft
- N228UA
- Make and model
- Boeing 777222
- Aircraft serial
- 30556
- Aircraft time
- 44,701 hours, 5,435 cycles
- Engine
- Pwa PW4090
- System (JASC)
- 2421 · AC Generator-Alternator
- Part
- Converter
- Condition
- Failed
- Location
- Backup Generator
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- H
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.