SDR ASAA2013053094948

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: May 30, 2013
Submitted: June 3, 2013
Operation: Air carrier
Aircraft: N403AS
Make and model: Boeing 737990ER
Aircraft serial: 41730
Aircraft time: 2,133 hours, 697 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
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

ENROUTE BOTH FMC CDUS FROZE. BUTTONS WOULD NOT RESPOND. 1 UNIT STUCK IN FMC MODE AND THE OTHER UNIT WAS IN ACARS MODE. THEN NO COMM ANNUNCIATED INIT REQ SHOWED IN SCRATCH PAD AND DAT STAMP ON FLIGHT LOG PAGE DISSAPPEARED. LASTED FOR ABOUT 2 MIN. ACFT GROUNDED. ACCOMPLISHED FMC BITE REF MM 34-61-00. NO FAULTS FOUND LAST LEG. SUSPECT FMC ACCOMPLISHED RAUTO RESTART. 1 & 2 FMCS OPS NORMAL REF MM 34-61-00.