NTSB Identification: LAX85LA309.
The docket is stored on NTSB microfiche number 29817.
Accident occurred Sunday, July 07, 1985 in DURHAM, CA
Aircraft: HILLER UH-12B, registration: N1048P
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PURPOSE OF THE LCL FLIGHT WAS FOR THE CFI TO DEMO THE NEWLY ACQUIRED HELICOPTER TO ITS OWNER. THE CFI REPORTED THAT DURING THE FLT A 'SOMEWHAT COMMON' VIBRATION WAS DETECTED, & HE ASSOCIATED THE VIBRATION WITH THE ACFT'S WOODEN MAIN ROTOR BLADES. HE FURTHER REPORTED THAT HE MAY HAVE BEEN DISTRACTED BY THE VIBRATION, & HE FAILED TO OBSERVE THE POWER LINES WHICH WERE IN THE LANDING APPROACH PATH. AT ABOUT 60 FT AGL THE ACFT'S MAST COLLIDED WITH THE WIRES. CONTROL WAS LOST, & DURING THE HARD LANDING THE BLADES FLEXED DOWN CUTTING OFF THE TAIL BOOM.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

VISUAL LOOKOUT..INADEQUATE..PILOT IN COMMAND(CFI)


Contributing Factors

DIVERTED ATTENTION..PILOT IN COMMAND(CFI)

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