SDR ASAA2021012233929

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: January 22, 2021
Submitted: January 27, 2021
Operation: Air carrier
Aircraft: N402AS
Make and model: Boeing 737990ER
Aircraft serial: 41189
Aircraft time: 30,508 hours, 9,866 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Failed
Location: Left
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

LEFT FMC FAIL BRIEFLY IN FLIGHT. VTK DISPLAYED CAPTAINS SIDE NAV DISPLAY. SYSTEM RECOVERED ON ITS OWN AND OPERATIED NORMALLY FOR DURATION OF FLIGHT. GROUNDED-YES. PREVIOUSLY RECORD FAULT MESSAGE NO LONGER PRESENT ON FFR, NO FAULTS WERE LOGGED ON LT & RT ADIRU BITE, REF B737-900 FIM 34-61 TASK 824. ACCOMPLISHED FMC OPERATIONAL TEST, REF B737-900 AMM 34-61-00-710-801. OPERATIONS NORMAL, NO HISTORY PAST 30 DAYS. MEL 34-36J CLEARED, SEAMC JOE NOTIFIED.