As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHEN THE HOOK ARRIVED AT E.C.L., THE SCREW AND NUT WHICH TIGHTEN THE SPACER (P/N S1609-19) HAD BEEN LOOSENED. IT WAS TIGHTENED TO PERFORM INCOMING TESTS. THE CAM WHICH RELEASES THE LOAD BEAM WOULD NOT FUNCTION UNDER LIGHT LOAD (12 LBS). AS THE LOAD WAS INCAREASED THE CAM WOULD BE PUSHED OUT OF THE PATH OF THE LOAD BEAM, BUT THE CAM WOULD NOT RETURN. WHEN THIS OCCURES THE HOOK WILL NO LONGER HOLD A LOAD..