SDR ASAA2015031410957

Service difficulty report · Fmc · Boeing 737890

Difficulty date: March 14, 2015
Submitted: March 16, 2015
Operation: Air carrier
Aircraft: N531AS
Make and model: Boeing 737890
Aircraft serial: 35199
Aircraft time: 19,043 hours, 5,776 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Inoperative
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

CAPTS FMC SCREEN WENT BLANK FOR 20 SECONDS. THE CALL AND FAIL LIGHTS ILLUMINATED THEN THE SCREEN SHOWED BIT TEST PASS AND CAME BACK ON. OPS NORMAL SINCE THAT EVENT. ACFT GROUNDED. ACCOMPLISHED FMCS BITE FIM 34-61, TASK 801. SENSOR STATUS SHOWS NO FAULTS. IN FLT FAULTS SHOWS MAINTENANCE MSG FOR CDU "L" RATE INTERMITTENT FOR FLT LEG NR 1. ACCOMPLISHED MCDU TEST IAW AMM 34-61-01 ALL TEST PASSED. NO HISTORY 30 DAYS. FMCS GROUND VERIFICATION PASSED.