SDR ASAA2015062812256

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: June 28, 2015
Submitted: June 30, 2015
Operation: Air carrier
Aircraft: N459AS
Make and model: Boeing 737990ER
Aircraft serial: 36352
Aircraft time: 5,086 hours, 1,660 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Stage of operation: CR
How discovered: 9
Nature of condition: O
Precautionary procedure: O

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

What was found

DURING CRUISE AT 360, CAPTAIN`S FMC FAILED WITH, VTK, THEN SELF RESTORED. ALSO, FMC DISAGREE ON LANDING ROLL. ACFT GROUNDED. ACCOMPLISHED FMCS BITE FIM 34-61, TASK 801 AND FMC DISAGREE FAULT ISOLATION FIM 34-61, TASK 835. NO SENSOR FAULTS OR FMC DISAGREE MESSAGE SHOWS. ALSO, ACCOMPLISHED CDS BITE PROCEDURE FIM 31-62, TASK 801. CURRENT STATUS SHOWS NO FAULTS. ACCOMPLISHED FMCS OPS TEST IAW AMM TASK 34-61-00-710-801. TEST PASSED.