What was found
"MANUALLY INITIATED ENGINE START TEST". THIS TEST GIVES FAULT, "BACKUP CONVERTER HAS INTERNAL FAULT". SUSPECT FAULTY CONVERTOR. REPLACED BACK UP GENERATOR CONVERTER PER MM 24-25-09. PASSED TEST PER MM 24-25-00. AC OK FOR SERVICE.
- Difficulty date
- May 8, 2008
- Submitted
- May 14, 2008
- Operation
- Air carrier
- Aircraft
- N772UA
- Make and model
- Boeing 777222
- Aircraft serial
- 26930
- Aircraft time
- 49,843 hours, 9,448 cycles
- Engine
- Pwa PW4077
- System (JASC)
- 2421 · AC Generator-Alternator
- Part
- Converter
- Part number
- 757183F
- Condition
- Faulted
- Location
- Nr 2 Bkup Gen
- Stage of operation
- IN
- How discovered
- C
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.