NTSB Identification: LAX84FA395.
The docket is stored on NTSB microfiche number 24562.
Accident occurred Sunday, July 15, 1984 in ORCUTT, CA
Aircraft: HILLER UH-12E, registration: N4030A
Injuries: 2 Uninjured.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
MAINTENANCE HAD JUST BEEN PERFORMED & THE CREW WERE BEGINNING A TEST FLT TO CHECK THE TRACKING OF THE MAIN ROTOR BLADES. WHILE THE PLT WAS HOVER TAXIING, HE LOST COLLECTIVE CONTROL & ROTOR RPM DECREASED. HOWEVER, HE WAS ABLE TO MAKE A ROLL-ON LANDING, BUT THE HELICOPTER ROLLED OVER & WAS DAMAGED. AN EXAM OF THE LOWER COLLECTIVE CENTER CONTROL HOUSING DISCLOSED THAT THE TERMINAL PIN WAS PLACED THRU THE OUTER HOUSING, BUT WAS INSTALLED BENEATH THE TERMINAL TEE RATHER THAN THRU THE TEE. THE MANUAL EMPHASIZES THAT THE PIN MUST PASS THRU THE TERMINAL TEE. THE MANUAL HAD NO PROVISIONS TO ASCERTAIN THAT THE PIN HAD BEEN INSTALLED THRU THE TERMINAL TEE.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:ROTORCRAFT FLIGHT CONTROL,COLLECTIVE CONTROL ROD..DISCONNECTED
The National Transportation Safety Board determines the probable cause(s) of this accident to be:MAINTENANCE,REPLACEMENT..IMPROPER..COMPANY MAINTENANCE PERSONNEL
The National Transportation Safety Board determines the probable cause(s) of this accident to be:CONDITION(S)/STEP(S) INSUFFICIENTLY DEFINED..MANUFACTURER
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