As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOREST FIRE FIGHTING CREW NOTICED HYD FLUID LEAKING AS HELICOPTER LANDED TO HOOK UP WATER BUCKET CABLE TO CARGO HOOK. HELICOPTER WAS SHUTDOWN AND PILOT FOUND CRACKED LINE IN NR 1 HYD SYS. SUSPECT OVERTIGHTENING OF NUT AND VIBRATION AS PROBABLE CAUSE OF CRACK.