SDR DL76L961302

Service difficulty report · Fmc · Boeing 767332

Difficulty date: May 27, 1996
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N173DN
Make and model: Boeing 767332
Aircraft serial: 24800
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Failed
Location: Right
Component: 4058650930
Stage of operation: CR
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

RT FMC LOCKED UP THEN LEFT FMC LOCKED. AFTER A PERIOD OF TIME, BOTH RESUMED NORMAL OPERATION FOR APPROXIMATELY 2 MINUTES, THEN RT FMC FAILED. THEN LEFT FMC FAILED. RE-PROGRAMMED ALL DATA IN FMC. AFTER APPROXIMATELY 2 MINUTES, BOTH FMC'S FAILED AGAIN. ON ARRIVAL NYC, REGAINED RT FMC AND THEN LEFT FMC. ON APPROACH, LT FMC FAILED AGAIN. CORRECTIVE ACTION: REPLACED RT MCDU WITH TWA POOL PART. PERFORMED TEST OF FMS SYSTEMS ALL OK.