SDR ASAA2017050620659

Service difficulty report · Warning Message · Boeing 737890

Difficulty date: May 6, 2017
Submitted: May 8, 2017
Operation: Air carrier
Aircraft: N583AS
Make and model: Boeing 737890
Aircraft serial: 35681
Aircraft time: 37,260 hours, 10,977 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Message
Condition: Illuminated
Stage of operation: CR
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

ALL VNAV FUNCTIONS FAILED EN ROUTE. TIME ESTIMATES, FUEL ESTIMATES, EN ROUTE WIND, AND DESCENT PLANNING ALL DISAPPEARED. THE COST INDEX ENTRY DISPLAYED EMPTY BOXES. ATTEMPTS TO REENTER THE CI GAVE REPEATED MESSAGES OF VNAV INVALID, PERF OR INVALID MOD PLAN. A POSSIBLE CORRELATION IS THAT THIS ALL HAPPENED AFTER REQUESTING UPDATED EN ROUTE WINDS. ACFT GROUNDED. FMC IN FLIGHT FAULTS SHOW FMC L, ETHERNER-2, WRAP, I, FAULT. CURRENTLY THERE ARE NO FAULTS. OPS CHECK BOTH FMC GOOD IAW AMM 34-61-00.