# NTSB ATL84LA007: Hiller UH-12B, N67699, Mccullough, AL, October 1, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 1, 1983, 18:00 local (22:00 UTC)
- Place: Mccullough, AL
- Coordinates: 31.019866, -87.489501 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=31.0199&lon=-87.4895&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 6358
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL84LA007
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/6358/pdf
- Page: https://openairdocs.org/ntsb/ATL84LA007

## Sequence of events

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

- Loss of engine power(partial) - nonmechanical, maneuvering
  - fuel system,carburetor - ice (contributing factor)
  - powerplant controls - not used, pilot in command (cause)
  - weather condition - carburetor icing conditions (contributing factor)
  - emergency procedure - improper, pilot in command (cause)
- Forced landing, landing - flare/touchdown
  - autorotation - improper, pilot in command (cause)

## Analysis

THE ACFT CRASHED IN A COTTON FIELD AFTER MANEUVERING AT LOW ALT TO CHECK THE CROP. THE PILOT SAID HE WAS AT AN ALT OF 4 OR 5 FT AND FORWARD FLT WAS BELOW TRANSITIONAL LIFT SPEED. THE ROTOR RPM BEGAN TO REDUCE AND ALSO THERE WAS A DROP IN ENGINE RPM. THE PILOT INCREASED ROTOR PITCH AND ROTOR RPMS CONTINUED TO DECAY. THE ACFT STRUCK THE GROUND, ROCKED FORWARD AND BACKWARD AND THE ROTOR CUT OFF THE TAIL BOOM. THE PILOT SHUT DOWN THE ENGINE WITH THE MIXTURE LEVER.

## Aircraft

- Registration: [N67699](https://openairdocs.org/aircraft/N67699), registered now, S/N 430, built 1951 (OpenAirDocs)
- Reported make and model: HILLER UH-12B
- Registry model: [Hiller OH-23B](https://openairdocs.org/model/hiller-oh-23b) (registry code 4360109) (OpenAirDocs)
- Category: Helicopter
- Serial number: 430
- Airframe hours: 2244
- Engines: FRANKLIN 6UH33550 210 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: James Wallace
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 20, 1983, 43 hours before
- Departed: MCCULLOUGH

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 7,630 total, 25 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 90° at 4 knots
- Visibility: 6 statute miles
- Temperature: 75 °F, dew point 63 °F
- Altimeter: 30.00 inHg
- Observed at: MOB

## 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 19831001052949A](https://openairdocs.org/incident/19831001052949A), Oct 1, 1983: Hiller UH12B, Mccullough, AL, Substantial damage. Engine lost power while helicopter was in slow flight 5 feet AGL. Rotor RPM decayed. Crash landed. Carburetor ice.

## Other investigations on N67699 (1)

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 IAD78FID21](https://openairdocs.org/ntsb/IAD78FID21), Aug 17, 1978: Hiller Acft UH-12B (N67699), Roanoke, VA, 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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