As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) RH ENGINE FIRE WARNING SYSTEM CONTAMINATED WITH WATER WHEN FLYINGTHROUGH HEAVY RAIN - FALSE FIRE WARNING CAUSED ENGINE TO BE SHUT DOWN AND FIRE BOTTLE OPERATED - DURING REPLACEMENT OF FIRE BOTTLEIT WAS FOUND THAT THE BOTTLE DID NOT DISCHARGE