SDR ASAA2019010427688

Service difficulty report · Fmc · Boeing 737890

Difficulty date: January 4, 2019
Submitted: January 8, 2019
Operation: Air carrier
Aircraft: N531AS
Make and model: Boeing 737890
Aircraft serial: 35199
Aircraft time: 33,672 hours, 9,983 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
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

APPROX 35 MIN AFTER T.O. AND LEVEL AT FL 360 RECEIVED A "DESCENT FORECAST WINDS" MESSAGE ON FO'S FMC. FOLLOWED BY CWS ON BOTH CAPT AND FO'S PFD FOLLOWED BY "MAP" ON FO'S PDF. "VTK" MESSAGE WAS NEVER DISPLAYED. COMPLETED QRH FOR FMC FAIL AND BOTH FMC'S RETURNED TO NORMAL OPERATION. GROUNDED - YES. INFO NOTED, SYSTEM HAS RESET AND CHECKS GOOD PER AMM 34-61-00-710-801, NO HISTORY LAST 30 DAYS.