SDR ASAA2019101763127

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: October 16, 2019
Submitted: October 17, 2019
Operation: Air carrier
Aircraft: N413AS
Make and model: Boeing 737990ER
Aircraft serial: 35205
Aircraft time: 26,131 hours, 8,430 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Left
Stage of operation: TO
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

FMC DISAGREE LIGHT DURING TAKEOFF ROLL AT ABOUT 100 KTS, WENT OUT ONCE AIRBORN. GROUNDED - YES. PERFORMED B737-900 FIM 34-61 TASK 835. TESTS GOOD. PERFORMED FMC BITE REF FIM 34-61 TASK 801. NO FAILURES NOTED. ON INFLT FAULTS FOUND FMC LEFT L IN BOTH FMC'S ON LEFG "G". INPUTTING 300 GOT "FMC L- FMC TO CDU-L" AND "FMC L- FMC TO CDU-R. SUSPECT CAUSED BY PULLING C/B'S TO ACCOMPLISH FIM 34-61 TASK 835. GROUND VERIFICATION SUCCESSFUL.