SDR ASAA2016031515943

Service difficulty report · Fmc · Boeing 737890

Difficulty date: March 15, 2016
Submitted: March 17, 2016
Operation: Air carrier
Aircraft: N529AS
Make and model: Boeing 737890
Aircraft serial: 35198
Aircraft time: 23,413 hours, 7,044 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Nr 1
Stage of operation: NR
How discovered: 9
Nature of condition: O
Precautionary procedure: O

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

What was found

FMC WOULD NOT SELECT TO POWER OR ALLOW MANUAL SELECTION OF TO POWER. ACFT GROUNDED. RESET FMCS COMPUTER 1 AND 2 CB'S, REF FIM TASK 34-61, TASK 836 AND ACARS CMU-1 AND CMU/ACARS DC C/B'S REF FIM TASK 23-27, TASK 815. NO HELP. FOUND TAT TEMP NOT DISPLAYING AND PROBE HEAT A AND B ON. TURNED OFF PROBE HEAT, TAT DISPLAYED AFTER SEVERAL MINUTES AND FMC POWER SELECTIONS DISPLAYED NORMALLY.