What was found
AIRCRAFT PERFORMED AN UNSCHEDULED LANDING DUE TO AFT CARGO FIRE WARNING & MASTER FIRE WARNING LIGHTS TURNED ON & FIRE DETECTION SYS WAS ACTIVATED. DURING MX REVISION, THE DISCHARGE LIGHT WAS FOUND ON & CARGO FIRE EXTINGUISHER BOTTLES WERE FOUND DISCHARGED. PERFORMED THE SMOKE DETECTION SYS TEST IAW AMM DMC-B787-26-16-00-00A-320A-A, NO CONFIRMING FAILURE & THE FIRE EXTINGUISHER BOTTLES WERE REPLACED IAW AMM DMC-B787-26-23-01-00A-520A-A -720A-A, TESTED CORRECT. AS A PRECAUTIONARY ACTION, THE ACFT WAS SENT TO THE HANGAR & REMOTE DATA CONCENTRATOR NR 8 WAS REPLACED IAW AMM DMC-B787-A-42-21-07-06-520A-A-720A-A. AFT CARGO SMOKE DETECTORS NUMBERS 1L, 2L, 3L, 4L, 1R, 2R, 3R & 4R WERE REPLACED IAW AMM DMC-B787-A-26-16-01-00A-520A-A -720A-A, EXTINGUISHER BOTTLES WERE REPLACED IAW AMM DMC-B787-26-23-01-00A-520A-A-720A-A & SMOKE DETECTION SYS TEST WAS PERFORMED IAW AMM DMC-B787-26-16-00-00A-320A-A, TESTED CORRECT.