SDR ASAA2014080408755

Service difficulty report · Warning Message · Boeing 737990ER

Difficulty date: August 4, 2014
Submitted: August 6, 2014
Operation: Air carrier
Aircraft: N457AS
Make and model: Boeing 737990ER
Aircraft serial: 36355
Aircraft time: 1,919 hours, 608 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Message
Condition: False Activation
Stage of operation: NR
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

CAPTAIN NAV DISPLAYED VTK, FOLLOWED BY MAP FAILURE WHILE BOTH CDU'S HAD NO FMC DATA. FMC FAIL QRH WAS ACCOMPLISHED. AFTER PLACING FMC SOURCE SELECTOR TO "BOTH ON R" THE MAP FOUND FMC DATA WERE RECOVERED BUT NO BEARING OR DISTANCE INFO WAS DISPLAYED FOR LT FMC. ACFT GROUNDED. RELOCATED FMCS TRANSFER SWITCH TO NORMAL RESET C/B FOR FMC NR 1, DUAL FMC OPS RESTORED, ACCOMP FMC BITE IAW FIM 34-61-801 TO NR 1 COMPUTER SENSOR STATUS AND INFLIGHT FAULTS SHOWS NO FAULTS GROUND VERIFICATION GOOD.