SDR ASAA201805144595

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: May 10, 2018
Submitted: May 14, 2018
Operation: Air carrier
Aircraft: N467AS
Make and model: Boeing 737990ER
Aircraft serial: 36362
Aircraft time: 15,523 hours, 5,221 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Captain'S
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

CAPTAIN'S FMC FAILED TWICE ENROUTE, EACH FAILURE LASTED 2 - 3 MINUTES WITH FMC SELF RECOVERING. LAST FAILURE RESULTED IN CWS, UNTIL FMC RECOVERED. QRH PROCEDURE COMPLIED WITH. CAPTAIN`S FMC RESTORED. THIRD FAILURE RESULTED IN SINGLE FMC OPERATION. ACFT GROUNDED. PERFORMED A RESET OF THE FMC IAW FIM 34-61 TASK 836, STEP E. PERFORMED FMC SYSTEM OPS TEST IAW AMM 34-61-00-710-801. OPS CHECKED GOOD. FMC SWITCH POSITIONED IN NORMAL. NO 90 DAY HISTORY.