Service difficulty report · Idg · Boeing 777222

Difficulty date
January 6, 2014
Submitted
January 7, 2014
Operation
Air carrier
Aircraft
N792UA
Make and model
Boeing 777222
Aircraft serial
26934
Aircraft time
73,637 hours, 10,343 cycles
Engine
Pwa PW4090
Part
Idg
Condition
Faulty
Location
Lt Engine
Stage of operation
CR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

ELEC GEN SYS LT IDG HAS DISCONNECTED OR A PROTECTIVE TRIP OF THE GEN CONTROL BREAKER HAS OCCURRED OR A PROTECTIVE TRIP OF THE BTB HAS OCCURRED. RECONNECTED LT IDG. ACCOMPLISHED FIM 24-11TASK 805, 803 NO AC-V,NO FREQ WITH ENG RUN. DISCONNECTED LT IDG, REPLACED IDG IAW MM 24-11-01 & GCU IAW MM 24-22-02, NO HELP. ON ARRIVAL MX MESSAGE ON MAT 24-31661 IDG LT OUTPUT CURRENT DOESN'T AGREE WITH P100 INPUT CURRENT. REPLACED IDG ON LT ENG & RAN ENG. NO STATUS MESSAGES & DISCONNECTED THEN RESET IDG ALL FUNCTIONS NORMAL IAW AMM.