SDR ASAA12511542

Service difficulty report · Fmc · Boeing 737890

Difficulty date: May 11, 2012
Submitted: May 14, 2012
Operation: Air carrier
Aircraft: N596AS
Make and model: Boeing 737890
Aircraft serial: 35688
Aircraft time: 15,319 hours, 4,903 cycles
Engine: Cfmint CFM567B273
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Faulted
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

AFTER PASSING 00HIL INTERSECTION, NR 1 CDU WENT BLANK, EXEC LIGHT ILLUMINATED, THIS LASTED FOR APPROX 10 SECS THEN SCREEN CAME BACK WITH SOME TEST DATA AND "BIT PASSED" ANNUNCIATION. ACFT GROUNDED. LT & RT FMC'S FFR FOR PREV FLT (1) SHOW "SCU LEFT B" FAULTS CHECKED. NO HISTORY. LT FMC CDU CURRENTLY OK. ACCOMPLISHED FIM 34-61/T804. OPS CHECKED LT FMC CDU, GOOD. INTERMITTENT FAULT.