SDR ASAA2017061921139

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: June 19, 2017
Submitted: June 21, 2017
Operation: Air carrier
Aircraft: N471AS
Make and model: Boeing 737990ER
Aircraft serial: 41703
Aircraft time: 10,859 hours, 3,597 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Left
Stage of operation: NR
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 FAILS INTERMITTENTLY. OPS RESTORED VIA CHECKLIST PROCEDURE, BUT FAILS AGAIN AFTER 30 MINUTES. REPEATED CHECKLIST AND RESTORED ONLY TO FAIL AGAIN LATER. ACFT GROUNDED. PERFORMED FIM 34-61, TASK 837, AND FIM 34-61, TASK 801. NO FAULTS NOTED AT THIS TIME.