What was found
AIR TURNBACK, DURING TAKEOFF BOTH FWD AND AFT CARGO FIRE INDICATION LIGHTS ILLUMINATED. REMOVED AND REPLACED FIRE WARNING CENTRAL CONTROL UNIT PER MM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIR TURNBACK, DURING TAKEOFF BOTH FWD AND AFT CARGO FIRE INDICATION LIGHTS ILLUMINATED. REMOVED AND REPLACED FIRE WARNING CENTRAL CONTROL UNIT PER MM.