CHI99LA141

NTSB accident investigation · Barrett Bensen B-8 · Mt. Pleasant, MI · May 1, 1999

Accident · Minor injuriesLimited investigationFinal report
Date
May 1, 1999, 14:15 local (18:15 UTC)
Place
Mt. Pleasant, MI
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N4659TBarrett Bensen B-8
Weather
Visual (VMC) · Day
Status
Completed · report November 30, 2000
Report
Approved by Office Director
FAA report
19990501021689A
Case key
46207

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 inadequate rotor rpm by the pilot.

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 flightGo-around (vfr)
Rotor rpm - inadequatePilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The pilot was attempting a go-around from a private airstrip. In a written statement, the pilot reported, 'I was coming in for a landing at my son-in-laws private airstrip. The strip has his house and a power line on the west end and woods on the east end. His strip is 1,200 feet long, plenty long for a gyro. I had made several landings there before. In the past my landings had been to the west. Due to the wind this one was from the east. As I approached I realized I was high and would use up a lot of runway, so I decided to go around. I then eased the throttle on to full and made a right bank . (there was a street, house, power line and a river to the left). At that moment the bird went into a downward roll to the left and nothing I did stopped it. I was on the ground before I knew it'. The pilot also stated that his airspeed was 40 mph and he did not recall making a right hand climb out before. The pilot reported that there was no mechanical malfunction. Examination of the wreckage revealed the gyroplane's rotor blades exhibited a cone shape.

Factual narrative

On May 1, 1999 at 1415 eastern daylight time, a Barrett Bensen B-8, N4659T, an experimental gyroplane, owned and piloted by a non-certificated pilot, received substantial damage on impact with terrain following a go-around attempt at a private airstrip. Visual meteorological conditions prevailed at the time of the accident. The 14 CFR Part 91 personal flight was not operating on a flight plan. The pilot reported minor injuries. The flight departed from Shepherd, Michigan, at 1400, en route to Mount Pleasant, Michigan.

During an interview the pilot stated that he approached a private airstrip in his gyroplane "a little high", He was going to use a lot of runway and elected to perform a go-around so as not to use a lot of runway. He stated that he normally turns to the left, but there were houses in that direction, so he turned to the right. He reported that he could not stop the slow roll to the right and impacted the terrain.

In a written statement, the pilot reported, "I was coming in for a landing at my son-in-laws private airstrip. The strip has his house and a power line on the west end and woods on the east end. His strip is 1,200 feet long, plenty long for a gyro. I had made several landings there before. In the past my landings had been to the west. Due to the wind this one was from the east. As I approached I realized I was high and would use up a lot of runway, so I decided to go around. I then eased the throttle on to full and made a right bank . (there was a street, house, power line and a river to the left). At that moment the bird went into a downward roll to the left and nothing I did stopped it. I was on the ground before I knew it". The pilot also stated that his airspeed was 40 mph and he did not recall making a right hand climb out before.

The pilot reported that he held a student pilot certificate. Federal Aviation Administration records indicate a third class medical certificate on July 14, 1995 was the last medical certificate that the pilot received.

The gyroplane had accumulated a total airframe time of 682 hours since April 5, 1990. There was no record of an annual condition inspection.

The pilot reported that there was no mechanical malfunction. Examination of the wreckage by the Federal Aviation Administration revealed the gyroplane's rotor blades to exhibit a cone shape.

Aircraft

Registration
N4659T
Reported as
Barrett Bensen B-8
Category
Gyroplane, amateur-built
Serial number
1
Airframe hours
682
Engine
Volkswagen 1600, 65 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Thurman Barrett
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Continuous airworthiness · April 10, 1999 · 12 hours before
Departed
Shepard, MI
Airport
runway 9, 1,200 × 30 ft, grass/turf

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
78
Certificate
Student
Medical
Class 3, Expired
Seat
Center

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
70 °F
Altimeter
30.00 inHg
Observed at
MBS, 30 nm away

FAA reports on this event · 1

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