SDR AALA201802149012

Service difficulty report · Relay · Boeing 777223

Difficulty date: February 11, 2018
Submitted: February 15, 2018
Operation: Air carrier
Aircraft: N779AN
Make and model: Boeing 777223
Aircraft serial: 29955
Aircraft time: 76,638 hours, 9,038 cycles
System (JASC): 4940 · APU Start/Ignition System
Part: Relay
Part number: FCAL125AY4
Condition: Faulty
Location: Left
Stage of operation: CL
How discovered: V
Nature of condition: J
Precautionary procedure: A

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

What was found

DURING CLIMB, THE LEFT ENGINE GENERATOR OFF LIGHT ILLUMINATED. FOLLOWED QRH PROCEDURES AND TRIED TO START THE APU, THE APU DID NOT START. EMERGENCY DECLARED, FLIGHT RETURNED TO DEPARTURE, UNEVENTFUL LANDING. MAINTENANCE REPLACED THE LT IDG IAW AMM 24-11-01 AND PERFORMED SATISFACTORY OPS CHECK. MAINTENANCE REPLACED THE RELAY IAW FIM 49-10-00, AND PERFORMED SATISFACTORY OPS CHECKED.