SDR ASAA2021020133988

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: February 1, 2021
Submitted: February 3, 2021
Operation: Air carrier
Aircraft: N471AS
Make and model: Boeing 737990ER
Aircraft serial: 41703
Aircraft time: 23,999 hours, 7,662 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Failed
Location: Left
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

HAD SHORT PERIOD (APPROX 1 MIN) FMC FAIL (VTK) ON CAPTAIN SIDE. IT CORRECTED ITSELF BEFORE ANY CHECKLIST WAS RUN. GROUNDED - YES. PERFORMED LEFT FMC RESET PER B737-900 FIM 34-61-00-810-836. BITE SHOWS "PRES LAT" FAULT. NO OTHER FAULTS LOGGED. SYS OPS NML.