SDR ASAA201904048880

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: April 2, 2019
Submitted: April 4, 2019
Operation: Air carrier
Aircraft: N479AS
Make and model: Boeing 737990ER
Aircraft serial: 60576
Aircraft time: 14,907 hours, 4,872 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: False Indication
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

WHILE IN CRUISE BOTH MCDU BLANKED W/ASSOCIATED VTK ON CA SIDE. SYSTEM REBOOTED BTW 30 SEC - 1 MIN AFTER EVENT WHILE RUNNING FMC FAIL QRH. GROUNDED - YES. VERIFIED . ACCOMPLISHED FMC BITE CHECK. BOTH L/H & R/H PASSED. NO FAULTS. OK FOR SERVICE. REF B737-900 FIM 36-61 TASK 801.