What was found
LEFT FMC FAILED. PERFORMED QRH PROCEDURE, DID NOT RECOVER LEFT FMC. ACFT GROUNDED. CONFIRMED FAULT, LT FMC INOPERATIVE. REPLACED LT FMC IAW AMM 34-61-02, CROSS-LOADED ALL SOFTWARE IAW AMM 34-61-00-201 & FMCS PERFORMANCE FACTORS IAW AMM 34-61-00-800-801, OPS CHECKED NORMAL IAW AMM 34-61-00.