What was found
CAPTAIN REPORTED THAT DURING GROUND HANDLING, IT WAS SHOWN BRAKE 7 ACTUATOR MESSAGE; MAINTENANCE PERSONNEL PERFORMED FIM DMCB 787-A-32-40-F1-43A-421A-A, ALL CORRECT; NOTWITHSTANDING THE AIRCRAFT RETURNED TO PLATFORM ONCE AGAIN DUE TO CAPTAIN REPORTED FAILURE “VHF L”; MAINTENANCE PERSONNEL PERFORM REVISION DETECTING MESSAGE “M-M 23-45014” INTERNAL FAILURE OF AGU; SO AUDIO GATEWAY UNIT WAS REPLACED P/N: 866-0078-101 S/N: 1XTPXR, IAW B787-A-23-51-04-00A-520A/720A-A, TESTED CORRECT.