SDR ASAA2022111440781

Service difficulty report · Fmc · Boeing 7379

Difficulty date: November 14, 2022
Submitted: November 16, 2022
Operation: Air carrier
Aircraft: N921AK
Make and model: Boeing 7379
Aircraft serial: 43337
Aircraft time: 4,015 hours, 1,148 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Failed
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

TWICE ENROUTE FMC LEFT "FAILED" FOR 60-90 SECONDS. VTK FLAG AND MAP FLAG DISPLAYED ON LEFT ND, FMC MENU ON BOTH MCDU. RIGHT FMC ACTED NORMAL FMC "L" RECOVERED ON ITS OWN WITHOUT QRH INTERVENTION. GROUNDED - YES. PERFORMED B737-9 IFIM 34-61-00-810-918 RESET FMC #1 NO FAULTS NOTED.

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