SDR UALA2010101903875

Service difficulty report · Generator · Boeing 777222

Difficulty date: October 19, 2010
Submitted: November 12, 2010
Operation: Air carrier
Aircraft: N223UA
Make and model: Boeing 777222
Aircraft serial: 30224
Aircraft time: 38,858 hours, 4,769 cycles
Engine: Pwa PW40903
System (JASC): 2421 · AC Generator-Alternator
Part: Generator
Part number: 1701768
Part serial: 348
Condition: Faulty
Location: Left
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

IMMEDIATELY AFTER TOUCHDOWN, ELEC BACKUP SYS EICAS MESSAGE. ABLE TO UNLATCH AND CLEAR STATUS MESSAGE, HOWEVER DUE TO LONG HISTORY DF PER MEL 2425A AS PRECAUTION. PER FIM 24-25 TSK 802, AFTER BU CONVERTER AND RT BUG REPLACEMENT, NEXT STEP TO REPLACE LEFT BUG, PART IS AT GRU. REPLACED NR 1 ENG BACKUP GENERATOR.