SDR AALA970656

Service difficulty report · Idg · Boeing 757223

Difficulty date: March 29, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N606AA
Make and model: Boeing 757223
Aircraft serial: 27057
System (JASC): 2421 · AC Generator-Alternator
Part: Idg
Condition: Failed
Location: Lt Engine
Stage of operation: TO
Nature of condition: H, J
Precautionary procedure: A

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

What was found

MIA - FLT 931 - ON TAKEOFF LEFT BUS FAILED AND ISOLATED, UNABLE TO RESTORE ANY POWER ON LAC BUS. REPLACED LEFT ENGINE IDG PERFORMED BITE LOAD AND DISCONNECT CHECKS PER MM OPERATION NORMAL LEAKS CHECKS OK. AS PRECAUTIONARY, REF MM 24-51-08-4 P. 403 AND ACCOMPLISH A TEST OF THE INSTRUMENT BUS VOLTAGE SENSING UNIT. REPORT YOUR FINDINGS IN FMR. ACCOMPLISHED TFI, LEFT AND RIGHT INSTRUMENT BUSSES TRANSFER NORMALLY. PERFORMED BITE ON BPCU. NO FAULTS FOUND. (M)