# NTSB MKC84LA153: Hiller 12E, N2726C, Bedford, IA, May 29, 1984

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: May 29, 1984, 11:15 local (16:15 UTC)
- Place: Bedford, IA
- Coordinates: 40.669342, -94.719306 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.6693&lon=-94.7193&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33693
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84LA153
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33693/pdf
- Page: https://openairdocs.org/ntsb/MKC84LA153

## Sequence of events

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

- In flight collision with terrain/water, maneuvering - aerial application
  - altitude - inadequate, pilot in command (cause)
- Roll over, maneuvering - aerial application

## Analysis

THE PLT HAD MADE TWO SWATH RUNS & WAS DESCENDING TO BEGIN THE THIRD. HE STATED THAT THE TURN WAS DOWNWIND & AS HE APPROACHED THE LEVEL-OFF ALTITUDE HE ENCOUNTERED A DOWNDRAFT. THE ACFT IMPACTED THE GROUND & ROLLED OVER. THE PLT ALSO STATED THAT THE DOWNDRAFT MAY HAVE COME FROM HIS OWN DOWNWASH.

## Aircraft

- Registration: [N2726C](https://openairdocs.org/deregistered/N2726C-2001-03-01), registration cancelled 2001-03-01, S/N 2188 (OpenAirDocs)
- Reported make and model: HILLER 12E
- Registry model: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (registry code 4360122) (OpenAirDocs)
- Category: Helicopter
- Serial number: 2188
- Airframe hours: 7140
- Engines: LYCOMING VO-540-B1A 305 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Circle Bin Sales, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, March 1, 1984, 15 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 2,855 total, 1,143 in this make and model, 2,785 as pilot in command, 65 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 3 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 70 °F

## 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 19840529024079A](https://openairdocs.org/incident/19840529024079A), May 29, 1984: Hiller UH12E, Bedford, IA, Destroyed. Flew back into his own downwash during a spray run turn around. Rolled and disentigrated on ground impact.

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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