SDR ASAA2016022415660

Service difficulty report · Warning Message · Boeing 737890

Difficulty date: February 24, 2016
Submitted: February 26, 2016
Operation: Air carrier
Aircraft: N577AS
Make and model: Boeing 737890
Aircraft serial: 35186
Aircraft time: 34,329 hours, 10,234 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Message
Condition: False Activation
Stage of operation: TX
How discovered: 9
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

RECEIVED SEVERAL SCRATCHPAD MESSAGES "SINGLE FMC OPERATION" AFTER SHUTDOWN. ACFT GROUNDED. CONFIRMED EXISTENCE OF "SINGLE FMC OPS" MESSAGES IN MCDU'S. REMOVED & RESET EXTERNAL POWER TO ACFT AND PERFORMED BITE TEST OF FMC'S IAW AMM 34-61, TASK 801. OPS NORMAL, NO FAULTS OR MESSAGES REMAIN.