SDR ASAA2018103126680

Service difficulty report · Unknown · Boeing 737990ER

Difficulty date: October 31, 2018
Submitted: November 1, 2018
Operation: Air carrier
Aircraft: N494AS
Make and model: Boeing 737990ER
Aircraft serial: 41729
Aircraft time: 11,021 hours, 3,639 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Unknown
Condition: Malfunctioned
Location: Cockpit
Stage of operation: LD
How discovered: O
Nature of condition: N
Precautionary procedure: K

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

What was found

AFTER LANDING WHILE WAITING ON RAMP FMC VTK CYCLED LEFT SIDE CONTINUED WHILE SHUT DOWN AT GATE. GROUNDED - YES. UNABLE TO DUPLICATE DEFECT. ON ARRIVAL IN PDX, BOTH FMCS WERE OPERATING NORMALLY AND FMCS BITE PER FIM 34-61 TASK 801 SHOWED NO FAULTS LOGGED BY EITHER FMC. PERFORMED INITIAL EVALUATION FOR FMC INOP FAULT PER FIM 34-61 TASK 836. BOTH FMCS CONTINUED TO OPERATE NORMALLY. PERFORMED FMCS OPERATIONAL TEST PER AMM 34-61-00-710-801. ALL TESTS PASS.