SDR ASAA2023010841474

Service difficulty report · Fmc · Boeing 7379

Difficulty date: January 8, 2023
Submitted: January 10, 2023
Operation: Air carrier
Aircraft: N921AK
Make and model: Boeing 7379
Aircraft serial: 43337
Aircraft time: 4,633 hours, 1,326 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Part number: UNKNOWN
Condition: Fault Message
Location: Unknown
Stage of operation: CR
How discovered: V
Nature of condition: J
Precautionary procedure: K

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

What was found

MOMENTARY 30 SECOND LEFT FMC FAILURE CHANGING ALTITUDE 340 TO 360 IN VNAV WITH SPEED INTERVENTION SELECTED. GROUNDED - YES. LEFT FMC FAULTED 'PRES POS LAT RATE' LAST LEG. ACCOMP B737-9 IFIM 34-61-00-810-918, SYS CKS NML PER SAME, GND VERIFICATION SUCCESSFUL.

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