# NTSB MKC84LA205: Hiller H-23D, N48313, Neelyville, MO, July 9, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 9, 1984, 07:00 local (12:00 UTC)
- Place: Neelyville, MO
- Coordinates: 36.549091, -90.50978 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.5491&lon=-90.5098&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33735
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84LA205
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33735/pdf
- Page: https://openairdocs.org/ntsb/MKC84LA205

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - initial climb
  - miscellaneous - undetermined (cause)
  - rotor rpm - not maintained, pilot in command (contributing factor)
  - rotor rpm - not possible, pilot in command (contributing factor)
- Forced landing, descent - emergency
- Roll over, landing - flare/touchdown

## Analysis

THE ACFT ROLLED OVER DURING AN EMERGENCY LANDING. THE PLT CLAIMED THAT THE ROTOR DISENGAGED AT ABOUT 30 FT AGL DURING TAKEOFF. AFTER THE ACCIDENT THE UPPER HALF OF THE YOKE CONTROL WAS FOUND FRACTURED. A LAB REPORT STATED THAT NO MATERIALDEFECTS WERE RELATED TO THE FAILURE. A VISUAL INSPECTION OF THE CLUTCH ASSEMBLY DID NOT INDICATE ANY REASON TO SUSPECT IT OF FAILURE.

## Aircraft

- Registration: [N48313](https://openairdocs.org/deregistered/N48313-2012-12-13), registration cancelled 2012-12-13, S/N 1213, built 1960 (OpenAirDocs)
- Reported make and model: HILLER H-23D
- Registry model: [Hiller H-23D](https://openairdocs.org/model/hiller-h-23d) (registry code 4360120) (OpenAirDocs)
- Registry engine: [Lycoming VO-540 series](https://openairdocs.org/engine/lycoming-vo-540-series) (registry code 41534, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1213
- Airframe hours: 7355
- Engines: LYCOMING VO-540 305 horsepower reciprocating
- Damage: Destroyed
- Flight: Aerial application, Part 137
- Registered owner: Johnny C. Atwell Sr.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, June 3, 1984, 53 hours before
- Departed: NEELYVILLE, MO

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 1,637 total, 1,366 in this make and model, 104 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 235° at 2 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 72 °F, dew point 64 °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 19840709030809A](https://openairdocs.org/incident/19840709030809A), Jul 9, 1984: Hiller H23D, Neelyville, MO, Destroyed. Reported failure between engine and rotor drive. Rolled on forced landing. Yoke control fractured. No metal fatigue

## Other investigations on N48313 (2)

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.

- [NTSB CHI89DEP07](https://openairdocs.org/ntsb/CHI89DEP07), Jul 20, 1989: Hiller UH-12E (N48313), Blackriverfalls, WI, destroyed. Probable cause: PILOT-IN-COMMAND'S FAILURE TO JETTISON THE EXTERNAL LOAD FOLLOWED BY HIS MISJUDGEMENT OF DISTANCE TO AVOID COLLISION WITH THE EXTERNAL LOAD.
- [NTSB MIA79DKQ10](https://openairdocs.org/ntsb/MIA79DKQ10), May 1, 1979: Hiller UH12D (N48313), Drew, MS, substantial damage

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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