As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF, WHEN SLING LOAD 10 FEET ABOVE GROUND, CARGO HOOK SELF RELEASED THE LOAD. COUPLING ON THE MANUAL RELEASE CABLE FOUND BROKEN. SUSPECT THAT CABLE RELEASE GETS DAMAGED BY FLYING DEBRIS WHILE LANDING WITH CARGO HOOK LOWERED FOR OPERATION.