SDR ASAA2016052116806

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: May 21, 2016
Submitted: May 25, 2016
Operation: Air carrier
Aircraft: N492AS
Make and model: Boeing 737990ER
Aircraft serial: 44110
Aircraft time: 1,765 hours, 603 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Left
Stage of operation: CR
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

LT FMC FAILURE IN FLIGHT. RESTORED ITSELF AFTER 15-20 SECOND. NO ACTION TAKEN. ACFT GROUNDED. COMPLIED WITH TASK CARDS N8234000, FLIGHT MANAGEMENT COMPUTER, FMC NAVIGATION DATABASE, NDB UPDATE AND 78273000, INTERROGATE THE FMC CDU FOR ENGINE FAULTS. NO FAULTS FOUND, REF WO 337909.