SDR ASAA2023101745723

Service difficulty report · Fmc · Boeing 737890

Difficulty date: October 17, 2023
Submitted: October 19, 2023
Operation: Air carrier
Aircraft: N519AS
Make and model: Boeing 737890
Aircraft serial: 36482
Aircraft time: 52,969 hours, 15,676 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Part number: 1762000101
Part serial: 002036
Condition: Faulty
Location: E/E Shelf E5-2
Part time: 59,506 hours, 18,948 cycles
Stage of operation: TX
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

AFTER LANDING FMC DISAGREE FROM BOTH FMC MENUS AND VTK APPEARS ON CAPT ND. GROUNDED - YES. FIM 34-61 TASK 801, FMC-L BITE TEST FUNCTION INOP, FO SIDE FMC SHOWS FMC-L FAULTED PGM FAULT, FMC TO CDU-L & R, ALSO FOUND FMC VALID GREEN LED NOT ON, REPLACED NEW FMCS-L & PERFORMED ALL INSTALLATION TEST GOOD AMM 34-61-02/401.