ATL85FA216

NTSB accident investigation · Bell 206B · Anneville, KY · July 15, 1985

Accident · No injuriesField investigationFinal report
Date
July 15, 1985, 14:45 local (18:45 UTC)
Place
Anneville, KY
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N16646Bell 206B
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Case key
6626

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Airframe/component/system failure/malfunctionCruise - normal
Rotorcraft flight control system,primary servo - leak
Maintenance,installation - improperOther maintenance personnelFactor
Hydraulic system,reservoir - low level
Fluid,hydraulic - lack of
Loss of engine power(total) - nonmechanicalCruise
Hard landingLanding - flare/touchdown
Terrain condition - open field
Autorotation - attemptedPilot in commandCause
Terrain condition - downhill
Flare - misjudgedPilot in commandCause
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
Reported as
Bell 206B
Category
Helicopter
Serial number
2132
Airframe hours
2,349
Engine
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.

Role
Pilot
Age
42
Certificates
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