SDR ASAA2019032128717

Service difficulty report · Unknown · Boeing 737890

Difficulty date: March 21, 2019
Submitted: March 22, 2019
Operation: Air carrier
Aircraft: N508AS
Make and model: Boeing 737890
Aircraft serial: 35691
Aircraft time: 40,585 hours, 12,153 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Unknown
Condition: Malfunctioned
Location: Cockpit
Stage of operation: NR
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

MOMENTARY VTK ON CA SIDE NAV DISPLAY, BOTH CA AND FO NAV INFO DISAPPEARED FROM DISPLAYS, NO OTHER MESSAGES. A/T L/M DISPLAYED ABOVE N1 DISPLAYS FOR 20 MINS THEN DISAPPEARED AND SEEMED TO DISPLAY NORMAL. AUTOTHROTTLE WORKED NORMAL FOR REMAINDER OF FLIGHT. GROUNDED - YES. COMPLIED WITH FIM 34-61 TASK 836. ALL IND NML. PERF BITE CK ON RT AND LT FMC PER FIM 34-61 TASK 801 ALL IND NML. ETOPS GROUND VERIFICATION SUCCESSFUL.