SDR ASAA2017010119216

Service difficulty report · Warning System · Boeing 737990ER

Difficulty date: January 1, 2017
Submitted: January 4, 2017
Operation: Air carrier
Aircraft: N471AS
Make and model: Boeing 737990ER
Aircraft serial: 41703
Aircraft time: 8,956 hours, 2,959 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

FO SIDE FMC PROMPT ON THE MCDU MENU PAGE KEEP FLASHING ON/OFF WHEN OFF (BLANK) FO UNABLE TO SELECT ANY FMC FUNCTIONS. NO OTHER INDICATIONS OF FAILURE. IE NO MAP FAILURE. GROUNDED - YES. CYCLED 4 C/B'S VERIFIED BOTH FMC'S ARE OK. ACCOMPLISHED ACARS CMU RESET. ACCOMPLISHED ACARS CMU BITE TEST, TEST PASS REF FIM 34-61 TASK 838.