IAD97LA015

NTSB accident investigation · Ayres Scorpion Executive · Union Vale, NY · November 4, 1996

Accident · No injuriesLimited investigationFinal report
Date
November 4, 1996, 16:00 local (21:00 UTC)
Place
Union Vale, NY
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N3903CAyres Scorpion Executive
Weather
Visual (VMC) · Day
Status
Completed · report April 15, 1998
Report
Approved by Office Director
Case key
28158

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

On this page

Probable cause

the pilot's failure to maintain control of the helicopter, which resulted in a subsequent emergency landing and collision with a fence and a cherry picker (vehicle). A factor relating to the accident was: the student pilot's lack of experience in the type helicopter.

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 flightManeuvering
Aircraft control - not maintainedPilot in commandCause
Lack of total experience in type of aircraftPilot in commandFactor
In flight collision with objectEmergency descent/landing
Object - fence
Object - vehicle

Analysis

The student pilot (SP) was hover taxiing his helicopter. The SP said that during a subsequent climb to 300 feet, the helicopter felt 'heavy and anemic.' He also said '... the helicopter was exhibiting flight characteristics I didn't like....' The helicopter traveled past the taxiway end, and the SP decided to do a circuit in the pattern. He said when he attempted a left turn, the helicopter started to lose altitude. He also stated that flight control problems required him to performed an emergency landing. During the emergency landing, the helicopter impacted a chain link fence, and the main rotor blade struck a cherry picker (vehicular equipment). Examination of the helicopter revealed no preimpact abnormalities with the engine or flight controls. The SP did not have a solo endorsement for the flight. His reported total flight experience in helicopters was 41 hours, of which, 1 hour was in this make and model of helicopter.

Factual narrative

On November 4, 1996, about 1600 eastern standard time, an Ayers Scorpion Executive helicopter, N3903C, was substantially damaged when it impacted terrain after an emergency descent and landing near Union Vale, New York. The student pilot (SP) was not injured. Visual meteorological conditions prevailed, and no flight plan had been filed for the local flight conducted under 14 CFR Part 91.

In a written statement to a Federal Aviation Administration (FAA) Inspector, the SP said the purpose of the flight was to hover and taxi test the helicopter after it had been serviced at his repair shop to ready the helicopter for inspection and a future airworthiness certificate. He further stated:

"...The test was conducted off one end of the taxiway. After entry into a hover taxi from a hover it soon became apparent that the helicopter was exhibiting flight characteristics I didn't like. Having traveled past the taxiway end, and heading towards some homes off the taxiway, I decided it would be safer to do a small circuit in the pattern and land on the runway. Experiencing flight control problems during this flight required me to make an emergency landing off the end of the runway...."

In the NTSB Form 6120.1/2 the SP stated that the helicopter slowly climbed to 300 feet, and felt "heavy and anemic." When he turned right base the helicopter wanted to roll and pitch down to the right. When the SP attempted a left turn the helicopter started to lose altitude.

During the emergency landing to a yard the helicopter impacted a chain link fence, and the main rotor blade struck a cherry picker.

Examination of the helicopter by an FAA Inspector revealed no pre-impact abnormalities with the engine or flight controls.

The SP did not have a solo endorsement for the flight. His reported total flight experience in helicopters was 41 hours, of which 1 hour was in the make and model of the accident helicopter.

Aircraft

Registration
N3903C
Reported as
Ayres Scorpion Executive (SCORPION E)
Category
Helicopter, amateur-built
Airframe hours
250
Engine
Rotorway 14S, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Robert Chapel
Airworthiness certificate
Special, Experimental (Special)
Departed
44N
Destination
44N
Airport
44N · Sky Acres, runway 17, 3,500 × 75 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
45
Certificates
Private, Student
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
620 total · 1 in this make and model · 7 in the last 90 days · 7 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 8 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
52 °F, dew point 34 °F
Altimeter
30.00 inHg
Observed at
POU, 8 nm away