ANC91LA058

NTSB accident investigation · Bell UH-1B · Dog Fish Bay, AK · May 21, 1991

Accident · FatalLimited investigationFinal report
Date
May 21, 1991, 12:32 local (20:32 UTC)
Place
Dog Fish Bay, AK
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N87966Bell UH-1B
Weather
Visual (VMC) · Day
Status
Completed · report July 13, 1993
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19910521016719A
Case key
5543

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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Probable cause

The pilot's exceeding the gross weight of the aircraft and inadequate supervision by company management. Contributing to the accident was the high vegetation.

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 control - in flightTakeoff - initial climb
Terrain condition - high vegetationFactor
Aircraft weight and balance - exceededPilot in commandCause
Supervision - inadequateCompany/operator managementCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The helicopter had just lifted off with a log on a 150 foot long line when the helicopter crashed. The investigation revealed that the helicopter was overweight by 1,660 pounds.

Aircraft

Registration
N87966
Reported as
Bell UH-1B
Category
Helicopter
Serial number
6413968
Airframe hours
3,525
Engine
Lycoming T53-L11D, 1,100 horsepower, turbo shaft
Damage
Destroyed
Fire
On-Ground
Flight
Other work use · Part 133
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · May 18, 1991 · 26 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
44
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
10,965 total · 2,000 in this make and model · 10,000 as pilot in command · 55 in the last 90 days · 30 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 10 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 41 °F
Altimeter
30.00 inHg

FAA reports on this event · 1

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