As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT RECEIVED EICAS MESSAGE "L" FAILED. SELECTED ALTERNATE OF FMC INST SIYRCE SEKECTIR & R. AUTOPILOT CMO. PERFORMED FIM 34-61-00 F16180A 1-3423. PERFORMED FIM 34-61-00 F16 111 STEPS 1, 50, 6 & 110. REMOVED AND REPLACED LT. ROBBED FMC FROM AC N123DN AND INSTALLED ON AC N120DL.