NTSB Identification: NYC83FHD01.
The docket is stored on NTSB microfiche number 20711.
Accident occurred Wednesday, June 08, 1983 in BRICKTOWN, NJ
Aircraft: HILLER UH-12D, registration: N67155
Injuries: 1 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.

THE PLT REPORTED AN ERRATIC RPM DROP & A PARTIAL LOSS OF POWER DURING A SWATH RUN. THIS OCCURRED WHEN THE HELICOPTER WAS APRX 10 FT ABOVE TREES AT APRX 40 KTS. THE ACFT BEGAN LOSING AIRSPEED & ALTITUDE. DURING AN EMERGENCY LANDING, THE TAIL ROTOR & MAIN ROTOR BLADES STRUCK TREE BRANCHES & THE PLEXIGLASS & LANDING GEAR WERE DAMAGED. DURING AN INVESTIGATION, THE IGNITION HARNESSES WERE CHECKED & THE #4 & #6 LEAD ASSEMBLIES, PN 10-720642, SHOWED LEAKAGE AT THE SLEEVE ASSEMBLY POINT (BENDIX PN 10-320473). A PARTIAL TEARDOWN OF THE ENG REVEALED NO OTHER PREIMPACT MECHANICAL FAILURE.

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

IGNITION SYSTEM,IGNITION HARNESS..OUTPUT LOW

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

IGNITION SYSTEM,IGNITION LEAD..LEAK


Contributing Factors

OBJECT..TREE(S)

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