SDR ASAA2017102922365

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: October 29, 2017
Submitted: October 31, 2017
Operation: Air carrier
Aircraft: N419AS
Make and model: Boeing 737990ER
Aircraft serial: 41734
Aircraft time: 18,401 hours, 6,053 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Right
Stage of operation: NR
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

RIGHT FMC FAILED AS INDICATED BY VTK FLAGS ON FIRST OFFICER'S ND AND LOSS OF LNAV / VNAV. CONDITION LASTED APPROXIMATELY 30 SECONDS AND NORMAL OPS RESTORED WITHOUT CREW INTERVENTION. ACFT GROUNDED. ACCOMPLISHED AN FMC BITE. VERIFIED LAST FLIGHT RIGHT FMC FAILED. CHECKED FMC SENSORS, ALL SHOW OK. NO ACTIVE FAULTS AT THIS TIME IAW FIM 34-61, TASK 801. ACCOMPLISHED RIGHT FMC TEST, TEST PASSED IAW AMM 34-61-00-710-801.