SDR ASAA2022120741058

Service difficulty report · Fmc · Boeing 7379

Difficulty date: December 7, 2022
Submitted: December 9, 2022
Operation: Air carrier
Aircraft: N919AK
Make and model: Boeing 7379
Aircraft serial: 44087
Aircraft time: 5,872 hours, 1,825 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Faulted
Location: Dual
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

AT CRUISE, HAD A MOMENTARY DUAL FMC FAILURE, A/P DISCONNECTED WITHOUT AURAL WARNING. FMC 'S RESTORED IN LESS THAN 10 SECONDS. GROUNDED - YES. NO FAULTS AT THIS TIME, ACCOMPLISHED B737-9 IFIM TASK 31-65-00-810-A02. BITE TESTS GOOD, PREVIOUS FLT AFFECT FAULTS NOT ACTIVE. OK FOR SERVICE PER B737-9 AMM REF 22-11-00-740-002.

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