SDR ASAA2019011927871

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: January 19, 2019
Submitted: January 23, 2019
Operation: Air carrier
Aircraft: N413AS
Make and model: Boeing 737990ER
Aircraft serial: 35205
Aircraft time: 23,199 hours, 7,553 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Part number: 1762000101
Part serial: 010657
Condition: Failed
Location: E&E Bay
Part time: 10,826 hours, 3,561 cycles
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: K

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

What was found

DURING FLT FO'S VTK ILLUMINATED ON 3 OCCASIONS LASTING 1-3 MINS EA TIME, ACCOMPANIED BY FMC SINGLE SOURCE OPS ALERTS. GROUNDED - YES. ACCOMPLISHED FIM 34-61 TASK, FOUND R FMCS COMPUTER HAS HARDWARE FAILURE, FAULTED ETHERNET-2 & WRAP LAST FLIGHT 1-4, 7-9. REMOVED & REPLACED R FMCS COMPUTER, PERFORMED GOOD INSTALLATION TEST, REF AMM 34-61-02.