SDR ASAA2013022794017

Service difficulty report · Fmc · Boeing 737890

Difficulty date: February 27, 2013
Submitted: March 1, 2013
Operation: Air carrier
Aircraft: N518AS
Make and model: Boeing 737890
Aircraft serial: 35693
Aircraft time: 15,583 hours, 4,717 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Failed
Location: Nr 2
Stage of operation: IN
How discovered: V
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

FMC NR2, INOPERATIVE FFR SHOWED NUMEROUS OCCURRENCES OF FMC DATA FAIL. ACFT GROUNDED. PERFORMED FMCS SYS BITE PROCEDURE REF FIM 34-61, TASK 801. INFLIGHT FAULTS SHOWED FMC FAULTS ONLY ON FLIGHT, LEG 5. PERFORMED FMCS OPS TEST REF MM34-61-00. TEST PASSED. SENSOR TEST SHOWED NO CURRENT FAULTS, FMCS OK.