ANC87FA043

NTSB accident investigation · Bell 47G-2 · Anchorage, AK · March 7, 1987

Accident · No injuriesField investigationFinal report
Date
March 7, 1987, 15:30 local (19:30 UTC)
Place
Anchorage, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N6140CBell 47G-2
Weather
Visual (VMC) · Day
Status
Completed · report March 21, 1988
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19870307005419A
Case key
4771

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.

Abrupt maneuverHover
Procedures/directives - not followedDual studentFactor
Procedures/directives - not followedPilot in command(cfi)Factor
Aircraft handling - not maintainedPilot in command(cfi)Cause
Altitude - improperPilot in command(cfi)Cause
Maneuver - improperPilot in command(cfi)Cause
In flight collision with terrain/waterHover

Analysis

A flight instructor and his commercial rotorcraft student were practicing quick stops to a hover at low altitude over a snow covered non-maintained airstrip. The student, a commercially rated fixed wing pilot, had successfully completed three quick stops, but struck the tail rotor on the runway surface on his fourth attempt causing the tail rotor to separate from the aircraft. The flight instructor took the controls and made an emergency landing. The helicopter landed hard and rolled onto its right side. The helicopter was substantially damaged, but neither pilot was injured.

Aircraft

Registration
N6140C
Reported as
Bell 47G-2
Category
Helicopter
Serial number
47
Airframe hours
8,399
Engine
Lycoming VO-435-B1A, 265 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Registered owner
Wilbur'S Flight Operations
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · May 15, 1986 · 83 hours before
Departed
MRI · Anchorage, AK
Airport
CSR · Campbell Airstrip, runway 2, 5,000 × 150 ft, snow

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
57
Certificates
Flight instructor, Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
31,000 total · 190 in this make and model · 29,000 as pilot in command · 230 in the last 90 days · 16 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
350° at 8 knots
Visibility
50 statute miles
Lowest ceiling
9,000 ft overcast
Temperature
16 °F, dew point 9 °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.

Other investigations on N6140C · 3

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