# NTSB CHI83LA321: Hiller UH-12E, N120NR, Brooklyn Park, MN, July 18, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 18, 1983, 18:23 local (23:23 UTC)
- Place: Brooklyn Park, MN
- Location: 45.1109° N, 93.3491° W: Placed by OpenAirDocs: center of Brooklyn Park, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.1109&lon=-93.3491&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): 12269
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI83LA321
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12269/pdf
- Page: https://openairdocs.org/ntsb/CHI83LA321

## Sequence of events

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

- In flight collision with object, maneuvering - aerial application
  - object - wire,transmission (contributing factor)
  - visual lookout - inadequate, pilot in command (cause)
- Forced landing, landing - flare/touchdown
- Roll over, landing - flare/touchdown

## Analysis

THE PLT REPORTED THAT HE WAS SPRAYING THE END ROWS OF A FIELD WHEN THE HELICOPTER APPROACHED SOME WIRES. HE STATED THAT HE SAW THE WIRES AT THE LAST SECOND & TRIED TO GET UNDER THEM. REPORTEDLY, THE HELICOPTER CROSSED BELOW A SET OF POWER LINES, BUT STRUCK A TELEPHONE LINE. THE PLT INITIATED A LANDING; HOWEVER, THE WIRE BECAME 'FOULED IN THE CONTROLS' MAKING CONTROL DIFFICULT. THE PLT REPORTED THAT THE HELICOPTER TOUCHED DOWN A LITTLE TOO FAST, BOUNCED TWICE & ROLLED OVER.

## Aircraft

- Registration: [N120NR](https://openairdocs.org/deregistered/N120NR-1989-03-16), registration cancelled 1989-03-16, S/N 1723 (OpenAirDocs)
- Reported make and model: HILLER UH-12E
- Registry model: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (registry code 4360122) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1723
- Airframe hours: 2300
- Engines: LYCOMING VO-540-C2A 350 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Hook Spray Service
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, March 21, 1983, 57 hours before
- Departed: BROOKLYN PARK, MN

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 4,186 total, 663 in this make and model, 3,793 as pilot in command, 227 in the last 90 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 140° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: none

## 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 19830718037159A](https://openairdocs.org/incident/19830718037159A), Jul 18, 1983: Hiller UH12E, Brooklyn Park, MN, Substantial damage. Struck wires at the end of a spray run.

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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