SDR ASAA2021051434815

Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date: May 14, 2021
Submitted: May 17, 2021
Operation: Air carrier
Aircraft: N459AS
Make and model: Boeing 737990ER
Aircraft serial: 36352
Aircraft time: 26,903 hours, 8,627 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Light
Condition: False Activation
Location: Fmc
Stage of operation: CR
How discovered: O
Nature of condition: N
Precautionary procedure: O

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

What was found

AT FL 350 CRUISE WITH AP2/FD2 SELECTED, FMC P/RST LIGHT ILLUMINATED, SHORTLY THEREAFTER, FO SIDE NAV DISPLAY ANNUNCIATED VTR & MAP WITH THE LOSS OF LNAV/VNAV. TRANSFERRED AP/FD TO #1 SIDE WITH NO FURTHER ISSUES. GROUNDED - YES. ACCOMPLISHED RESET OF BOTH FMC'S IAW B737-900 FIM 34-61 TASK 836.OPS CHECK OK.