# NTSB NYC83FHD01: Hiller UH-12D, N67155, Bricktown, NJ, June 8, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: June 8, 1983, 19:30 local (23:30 UTC)
- Place: Bricktown, NJ
- Location: 40.0593° N, 74.1371° W: Placed by OpenAirDocs: center of Bricktown, NJ, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.0593&lon=-74.1371&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 35099
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC83FHD01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/35099/pdf
- Page: https://openairdocs.org/ntsb/NYC83FHD01

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(partial) - mech failure/malf, maneuvering - aerial application
  - ignition system,ignition harness - output low (cause)
  - ignition system,ignition lead - leak (cause)
- Forced landing, landing - flare/touchdown
- On ground/water encounter with terrain/water, landing - flare/touchdown
  - object - tree(s) (contributing factor)
- Hard landing, landing - flare/touchdown

## Analysis

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.

## Aircraft

- Registration: [N67155](https://openairdocs.org/aircraft/N67155), registered now, S/N 1335, built 1961 (OpenAirDocs)
- Reported make and model: HILLER UH-12D
- Registry model: [Hiller-Osborn UH-12D](https://openairdocs.org/model/hiller-osborn-uh-12d) (registry code 4361501) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1335
- Airframe hours: 7055
- Engines: LYCOMING VO-435-A1C 250 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Raco Helicopter Corporation
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, May 15, 1983, 56 hours before
- Departed: BLM, FARMINGDALE, NJ

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 1,729 total, 360 in this make and model, 1,661 as pilot in command, 112 in the last 90 days, 30 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 180° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 81 °F
- Altimeter: 30.00 inHg

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19830608023609A](https://openairdocs.org/incident/19830608023609A), Jun 8, 1983: Hiller UH12D, Bricktown, NJ, Substantial damage. RPM drop and partial power loss reported by ag pilot. Helicopter crashed in trees. Found ignition lead leaks.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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