DEN88FA106

NTSB accident investigation · Bell 47G-3B1 · Cortez, CO · May 7, 1988

Accident · FatalField investigationFinal report
Date
May 7, 1988, 17:30 local (23:30 UTC)
Place
Cortez, CO
Injuries
1 fatal, 1 serious
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N8455EBell 47G-3B1
Weather
Visual (VMC) · Day
Status
Completed · report October 3, 1989
Report
Approved by Office Director
FAA report
19880507023589A
Case key
17365

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

On this page

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/malfunctionClimb - to cruise
Rotorcraft flight control,collective control - failure,totalCause
Forced landingDescent - emergency
Hard landingLanding - flare/touchdown
Terrain condition - softFactor
Misc rotorcraft,tail boom - sheared

Analysis

The plt said that he had just taken off and reached an alt of about 300 ft when his collective control went 'limp'. The helicopter entered a descent, partially controlled by the plt using throttle and cyclic control inputs. The helicopter touched down in soft mud. The helicopter rocked forward and then aft causing the main rotor blades to sever the tail boom and also strike the ground. A post accident fire erupted destroying the helicopter. Several broken parts were examined at a lab. There was no evidence of fatigue or corrosion on the fractured surfaces.

Aircraft

Registration
N8455E
Reported as
Bell 47G-3B1
Category
Helicopter
Serial number
2658
Airframe hours
7,262
Engine
Lycoming TVO-435-A1A, 260 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
Stocks, Kenneth M.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · March 1, 1988 · 22 hours before
Destination
Delores, CO

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
56
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
800 total · 300 in this make and model · 695 as pilot in command · 22 in the last 90 days · 10 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 5 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
43 °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 N8455E · 1

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