SDR ASAA2021070195205

Service difficulty report · Fmc · Boeing 737890

Difficulty date: June 29, 2021
Submitted: July 1, 2021
Operation: Air carrier
Aircraft: N514AS
Make and model: Boeing 737890
Aircraft serial: 35193
Aircraft time: 45,917 hours, 13,599 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Failed
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

MOMENTARY/TRANSIENT FMC FAILURE. EVENT LASTED ABOUT 1 MIN. VTK FLAG ON CAPT'S ND, BOTH CDU'S OUT, AND A/T LIM ON UPPER DU. ALL BACK TO NORMAL WITHOUT PILOT INTERVENTION. GROUNDED - YES. ACCOMPLISHED FMC RESET FOR LH & RH PER B737-800 FIM 34-61 TASK 836 ACCOMPLISHED FMC BITE: BOTH FMC SHOW SENSORS AS "OK" AND NO IN FLIGHT FAULTS. OK FOR SVC REF FIM 34-61-801 FOR FMC BITE.