SDR ASAA2021032834445

Service difficulty report · Fmc · Boeing 737890

Difficulty date: March 28, 2021
Submitted: March 30, 2021
Operation: Air carrier
Aircraft: N518AS
Make and model: Boeing 737890
Aircraft serial: 35693
Aircraft time: 44,442 hours, 13,153 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Part number: 000
Condition: Failed
Location: Cockpit
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

DUAL FMC FAILURE DURING CRUISE (VTK FLAGS ON BOTH NDS, CWR, A/T LIM ANNUNC). BOTH FMC'S RESET. GROUNDED - YES. PERFORMED FMC BITE PROCEDURE PER B737-800 FIM 34-61 TASK 801 FOUND FMC-L-PGM FAULT, PERFORMED FIM 34-61 TASK 807 FOUND THAT THERE WAS AN INTERMITTEN FAULT, A/C OKAY FOR SERVICE.