# NTSB ATL85FA216: Bell 206B, N16646, Anneville, KY, July 15, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: July 15, 1985, 14:45 local (18:45 UTC)
- Place: Anneville, KY
- Coordinates: 37.319263, -83.960083 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.3193&lon=-83.9601&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 6626
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL85FA216
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/6626/pdf
- Page: https://openairdocs.org/ntsb/ATL85FA216

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - rotorcraft flight control system,primary servo - leak
  - maintenance,installation - improper, other maintenance personnel (contributing factor)
  - hydraulic system,reservoir - low level
  - fluid,hydraulic - lack of
- Loss of engine power(total) - nonmechanical, cruise
- Hard landing, landing - flare/touchdown
  - terrain condition - open field
  - autorotation - attempted, pilot in command (cause)
  - terrain condition - downhill
  - flare - misjudged, pilot in command (cause)
  - terrain condition - high obstruction(s)

## Analysis

THE PILOT STATED THAT THE AIRCRAFT EXPERIENCED HYDRAULIC SYSTEM FAILURE FOLLOWED BY A LOSS OF ENGINE POWER. AN EMERGENCY AUTOROTATION LANDING WAS ATTEMPTED IN A PASTURE AND DURING THE LANDING THE AIRCRAFT WAS SUBSTANTIALLY DAMAGED. POST CRASH EXAMINATION REVEALED THAT THE HYDRAULIC FLUID HAD LEAKED OUT OF THE SYSTEM. HOWEVER, NO PRE-EXISTING FAILURE OR MALFUNCTION IN THE POWERPLANT SYSTEM COULD BE FOUND WHICH WOULD HAVE RESULTED IN A LOSS OF POWER. DURING ENGINE TEST RUN THE ENGINE OPERATED TO MANUFACTURER'S SPECIFICATIONS.

## Aircraft

- Registration: N16646 (not matched to a registry record)
- Reported make and model: BELL 206B
- Category: Helicopter
- Serial number: 2132
- Airframe hours: 2349
- Engines: ALLISON 250-C20B 317 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Executive/Corporate, Part 91
- Registered owner: Roy B Schweitzer
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, July 15, 1985, 5 hours before
- Departed: HTS, HUNTINGTON, WV
- Destination: GRAYSON, KY

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; flight instructor, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: helicopter, airplane; medical: class 1, valid medical--w/ waivers/lim; seat: right; flight hours: 14,975 total, 1,328 in this make and model, 13,464 as pilot in command, 246 in the last 90 days, 98 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 12 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point 63 °F
- Altimeter: 30.00 inHg
- Observed at: LOZ, 16 nm away

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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