ATL85LA121

NTSB accident investigation · Bell 47G · Erin, TN · March 16, 1985

Accident · Minor injuriesLimited investigationFinal report
Date
March 16, 1985, 14:45 local (20:45 UTC)
Place
Erin, TN
Injuries
1 minor, 2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N73DBBell 47G
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19850316007679A
Case key
6763

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.

Loss of engine power(total) - nonmechanicalApproach
Weather condition - carburetor icing conditionsFactor
Anti-ice/deice system - not usedPilot in commandCause
Lack of total experience in kind of aircraftPilot in commandFactor
Hard landingLanding - flare/touchdown

Analysis

After a power loss at low alt. During approach to touchdown,the pilot bled off rotor RPM attempting to clear power lines across his approach path. This resulted in a lack of rotor energy necessary for an autorotaiton landing. A hard landing resulted. Carburetor heat was not used except during initial runup and weather conditions were favorable for carburetor ice formation.

Aircraft

Registration
N73DB
Reported as
Bell 47G
Category
Helicopter
Serial number
1277 DBA
Airframe hours
58,689
Engine
Franklin 6V-335-A, 200 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 91
Registered owner
Thomas. Luipersbeck
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · February 22, 1985 · 345 hours before

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
24
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
1,154 total · 75 in this make and model · 889 as pilot in command · 32 in the last 90 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 5 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point -0 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N73DB · 1

Matched to the same aircraft by N-number and date.