IAD02LA054

NTSB accident investigation · Miller Barnet J4B-2 · Manville, NJ · May 26, 2002

Accident · Minor injuriesLimited investigationFinal report
Date
May 26, 2002, 10:24 local (14:24 UTC)
Place
Manville, NJ
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N8121MMiller Barnet J4B-2
Weather
Visual (VMC) · Day
Status
Completed · report May 13, 2003
Report
Approved by Office Director
Parties
FAA
FAA report
20020526010489A
Case key
54804

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 improper flare prior to touchdown. A factor was the pilot's lack of experience in aircraft type, make, and model.

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 flightLanding - flare/touchdown
Flare - improperPilot in commandCause
Lack of experiencePilot in commandFactor
In flight collision with terrain/waterLanding - flare/touchdown
Terrain condition - ground
Roll overLanding - roll

Analysis

The pilot of the gyrocopter had conducted several touch and go's on the runway. On his last approach, he aligned the gyrocopter with the grass apron, and elected to continue on his heading to land on the grass adjacent to the runway. Witnesses described the approach as "fast" and "odd" and that the gyrocopter pitched nose-down before hitting the ground and rolling over. The pilot had 200 hours of flight experience. He did not possess a rating or a student endorsement for rotorcraft/gyrocopter, and had no experience in make and model. The pilot reported that there were no mechanical anomalies with the gyrocopter.

Factual narrative

On May 26, 2002, at 1024 eastern daylight time, a homebuilt Barnett J4B-2 gyrocopter, N8121M, was substantially damaged during a landing at Central Jersey Regional Airport (47N), Manville, New Jersey. The certificated private pilot/owner received minor injuries. Visual meteorological conditions prevailed and no flight plan was filed for the local personal flight conducted under 14 CFR Part 91.

A pilot-rated witness stated that he watched the gyrocopter as it flew traffic patterns around the airport, and on the accident flight. He observed the flight of the gyrocopter from the parking ramp as he secured an airplane. During the last approach, the gyrocopter approached the grass area adjacent to runway 25 during an "odd, step-down" approach. The gyrocopter leveled off at 200 feet, reduced power, dove down and leveled off at 100 feet, reduced power, then leveled off at 50 feet. The last time the power was reduced, the gyrocopter pitched to a nose-down attitude and flew straight into the ground with no landing flare. The witness described the engine noise as "solid", with no sputtering or missing.

A second witness said he had seen the gyrocopter perform takeoffs, landings, and traffic-pattern flights earlier in the day, and was walking out to his airplane when he noticed the gyrocopter approach the grass for a landing. The gyrocopter crossed abeam the landing threshold of the runway about 200 feet above the ground. The approach was fast, and the gyrocopter landed down at the departure end of the airfield. The gyrocopter rolled over as soon as it made contact with the ground. When asked about the sound of the engine, the witness said it sounded "fine."

According to a third witness, who managed the local flight school, the gyrocopter had flown the length of the field at low altitude, landed, and taxied back several times prior to the accident. He did not see the accident flight, but heard the gyrocopter make contact with the ground. He then drove to the accident site to assist the pilot.

The pilot had performed taxi tests of the gyrocopter during the weekend. When asked if they were post-maintenance tests, he said no. According to the pilot, he was conducting taxi tests on Saturday and Sunday. He had never really flown the gyrocopter before, and was in the process of getting it ready to fly. He added that he didn't mean to get airborne during the tests. On the last run, he took off on runway 25, but didn't think there was enough room to land, so he decided to go around. He flew crosswind, downwind, and base-to-final legs.

When the pilot was asked if he was aligned with the paved runway when he turned from base leg to final, he replied that when he completed the turn, he was aligned with the grass apron, and elected to continue on his heading to land on the grass adjacent to the runway. When he did, he touched down in a hole, or he bounced, and the gyrocopter rolled over. When asked about the performance and handling of the gyrocopter, the pilot said, "It was very, very good."

The gyrocopter was examined at the scene by Federal Aviation Administration inspectors. One of the inspectors stated that there were no mechanical anomalies.

The pilot held a private pilot certificate with an airplane single engine land rating. He did not possess a rating or a student endorsement for rotorcraft/gyrocopter.

The pilot reported about 200 hours of total flight experience, none of which was in the accident gyrocopter. He added that he had flown an ultra-light gyrocopter for about two years.

The weather reported at Somerville, New Jersey, about 7 miles northwest of Manville, included calm winds with 9 miles of visibility.

Aircraft

Registration
N8121M
Reported as
Miller Barnet J4B-2
Category
Gyroplane, amateur-built
Serial number
368-2
Airframe hours
45
Engine
Subaru EA-82, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Thomas K. Dempsey
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Continuous airworthiness · March 18, 2000 · 45 hours before
Departed
47N · Manville, NJ
Destination
47N · Manville, NJ
Airport
47N · Dummy, runway 25, 3,509 × 50 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
60
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
January 14, 2002
Seat
Center
Flight hours
200 as pilot in command · 30 in the last 90 days · 20 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
9 statute miles
Lowest ceiling
1,300 ft overcast
Temperature
59 °F, dew point 55 °F
Altimeter
30.13 inHg
Observed at
SMQ, 7 nm away

Docket · 6

The files NTSB released with the investigation on April 1, 2003, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.8 MB in all.

FAA reports on this event · 1

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