SDR ASAA2016081417701

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: August 14, 2016
Submitted: August 16, 2016
Operation: Air carrier
Aircraft: N493AS
Make and model: Boeing 737990ER
Aircraft serial: 41727
Aircraft time: 2,219 hours, 713 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Stage of operation: LD
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

AFTER LANDING, BOTH FMC PROMPTS DROPPED ON BOTH FMCS, VTK FLAG ON CAPT MAP - FMC PROMPT REAPPEARED AFTER ABOUT 5 SECONDS AND VTK FLAG DISAPPEARED. ACFT GROUNDED. PERFORMED FMCS BITE NO FAULTS FOUND. ALL SENSOR DATA IS CORRECT IAW AMM 34-61-00, LEFT AND RIGHT FMC OPS CHECKS GOOD.