Service difficulty report · Idg · Boeing 767322

Difficulty date
June 28, 2024
Submitted
July 2, 2024
Operation
Air carrier
Aircraft
N648UA
Make and model
Boeing 767322
Aircraft serial
25285
Aircraft time
121,667 hours, 18,845 cycles
Part
Idg
Part number
745329F
Part serial
G1367
Condition
Warning Light
Location
Fd
Part time
724,882 hours, 703,682 cycles
Stage of operation
NR
How discovered
O
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

DEBRIEFED FLIGHT CREW, CREW STATES L GEN DRIVE LIGHT ILLUMINATED ON OVERHEAD IN FLIGHT. PILOTS SELECTED L IDG DISCONNECT SW TO DISCONNECT IDG R BEING 11. 24-20 TASK 804, NO FAILURES/FAULTS DISCOVERED. FOUND SIGNIFICANT OIL LEAKS INSIDE LH ENGINE COWLINGS AND ON IDG OIL PLUMBING. SUSPECT SUDDEN OIL LOSS TRIGGERED FAILURE OF IDG. RECCOMEND IDG REPLACEMENT. PERFORMED BITE OF BPCU AND FOUND MULTIPLE FAULTS ON BPCU FOR THE PICS ATTACHED OF AUTO EVENT AND BITE RESULTS. PICS CONTINUED AUTO EVENT PERFORMED FIM 24-20 TASK 801 AND FOUND MULTIPLE MGS ON BPCU FOR LEFT GENERATOR SYSTEM. SOME FAULTS FOUND WERE IDG HIGH RISE TEMP PERFORM CORRECTIVE ACTION AS REQUIRED. IDG PARTS INFORMATION LEFT GEN POWER SYSTEM: SVC IDG, IDG/PRESSURE SW WIRING, UNDER WHICH COINCIDES WITH AUTO EVENT WHICH DISPLAYED A 10 DEGREE C ATTACHED. FREQ TRIP, IDG/PMG WIRING, DISCONNECT TRIP, IDG NOT DIFFERENCE IN IDG RISE TEMPS BETWEEN L AND R WITH L BEING 21 AND DISCONNECTED. PERFORMED TROUBLESHOOTING FOR MESSAGES REF FIM 00-0586-3-1071 IDG REMOVED REF AMM 24-11-01. NEW IDG INSTALLED UP TO 24-11-01 SUBTASK 24-11-01-424-022-006. QAD REQUIRES TORQUE AS WELL AS ALL UNIONS. PRESSURE FILL COUPLINGS NEEDS REPLACEMENT, DRAIN COUPLIMG REPLACED REF AMM 20-10-20 PARTS USED: