SDR ASAA2019021728210

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: February 17, 2019
Submitted: February 20, 2019
Operation: Air carrier
Aircraft: N402AS
Make and model: Boeing 737990ER
Aircraft serial: 41189
Aircraft time: 24,861 hours, 8,162 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: N
Precautionary procedure: O

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

What was found

AT CRUISE CAPTAINS NAV DISPLAY HAD MAP AND VTK FLAG. LASTED FOR 30 SECONDS THEN WENT BACK TO NORMAL NAV INDICATIONS. GROUNDED - YES. OPENED 2EA CB'S AND CLOSED 2EA CB'S. ACCOMPLISHED FIM 34-61 TASK 836, OPS CK NORMAL. FMC COMPUTERS RESYNCHRONIZED.