As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FSD - FLT 434 - CREW REPORTED THE LEFT ENGINE FIRE WARNING LIGHT WOULD NOT TEST ON PREFLIGHT. THE SYSTEM WAS INSPECTED AND THE WIRE TO THE ENGINE OIL COOLER DUCT FIRE DETECTOR WAS OPEN. THE WIRE WAS REPAIRED AND THE SYSTEM OPERATED NORMAL. THE AIRCRAFT WAS RELEASED. (M)