SDR ASAA2012100493019

Service difficulty report · Warning Message · Boeing 737890

Difficulty date: October 4, 2012
Submitted: October 9, 2012
Operation: Air carrier
Aircraft: N517AS
Make and model: Boeing 737890
Aircraft serial: 35197
Aircraft time: 14,458 hours, 4,467 cycles
Engine: Cfmint CFM567B273
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Message
Condition: False Activation
Location: Fmc
Stage of operation: NR
How discovered: O
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 SINGLE FMC OPERATION WITH MAP INDICATED ON RT NAV DISPLAY. ACCOMPLISHED QRH PROCEDURES BUT NEVER GOT DUAL FMC OP RESTORED MSG. SUSPECT RT FMC FAILURE. ACFT GROUNDED. CHECKED FMC COMPUTER, NO CURRENT FAULTS STORED, NO FAULT LIGHT ON FRONT OF COMPUTER. RAN DFCS LRU REPLACEMENT TEST FOR FMC, TEST PASS. ACCOMPLISHED FMC OPS TEST, TEST PASS, REF MM 34-61-00. GROUND VERIFICATION SATISFACTORY.