IAD97LA108

NTSB accident investigation · Riekkenen Ryelong LE · Wurtsboro, NY · August 9, 1997

Accident · FatalLimited investigationFinal report
Date
August 9, 1997, 11:35 local (15:35 UTC)
Place
Wurtsboro, NY
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N4YCRiekkenen Ryelong LE
Weather
Visual (VMC) · Day
Status
Completed · report June 9, 1999
Report
Approved by Office Director
FAA report
19970809021389A
Case key
28223

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 performed an aerobatic maneuver and misjudged the altitude.

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.

In flight collision with terrain/waterManeuvering
Aerobatics - performedPilot in commandCause
Altitude - misjudgedPilot in commandCause

Analysis

The pilot took off in his homebuilt airplane and remained in the traffic pattern. The airplane maintained its altitude throughout the pattern, and descended on final to reach the approach end of the runway at a low altitude and high rate of speed. About two thirds of the way down the runway, the nose of the airplane raised and the airplane began to climb. About 100 AGL, the airplane commenced a left roll. When the airplane was inverted, the nose dropped below the horizon and the airplane began to descend. As the roll continued, the rate of descent increased, and the airplane impacted the ground in a 30-45 degree right wing down and 30 degrees nose down attitude.

Factual narrative

On August 9, 1997, about 1135 eastern daylight time, a homebuilt Ryelong LE, N4YC, was destroyed as it impacted the terrain during a low altitude maneuver at the Wurtsboro-Sullivan County Airport, Wurtsboro, New York. The certificated private pilot/owner was fatally injured. Visual meteorological conditions prevailed and no flight plan was filed for the flight conducted under 14 CFR Part 91.

Numerous witnesses watched as the airplane departed on runway 23. The airplane climbed into the left traffic pattern, and the pilot extended the downwind while maintaining altitude. The witnesses stated that the turns to base leg and final were done in such a way as to lose altitude and accelerate the airplane. The airplane arrived over the approach end of runway 23, about 20 feet above the ground and at an estimated airspeed in excess of 180 MPH.

About two thirds of the way down the runway, the airplane nosed up and, about 100 feet AGL, commenced a left roll. Witnesses stated that half way through the roll, in an inverted attitude, the nose of the airplane dropped below the horizon. The airplane began to descend, and as the airplane continued to roll, the rate of descent increased. The airplane impacted the ground in a 30-45 degree right wing down and 30 degrees nose down attitude. A witness stated that the engine was running the entire maneuver.

Federal Aviation Administration (FAA) Inspectors examined the wreckage and the debris field. Their examination revealed that the Initial Impact Point (IIP) was 135 feet left of the approach end of runway 5, and the debris field was oriented about 300 degrees magnetic. The Inspectors stated that the airplane broke into multiple parts upon impact with a piece of wreckage found over 380 feet from the IIP. The Inspector reported that the airplane was too fragmented to obtain a flight control continuity check, and the engine was so badly damaged, that compression and valve train continuity could not be checked.

All witnesses interviewed stated that they did not notice any problems with the airplane as it flew over the runway at a high rate of speed and a low altitude. They stated that the maneuver appeared to be deliberate, and the pilot would have been successful if not for the low altitude.

No log books for the pilot's flight time nor any maintenance logs were recovered by the FAA Inspector.

Aircraft

Registration
N4YC
Reported as
Riekkenen Ryelong LE
Category
Airplane, amateur-built
Serial number
854
Engine
Lycoming O-320, 160 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Martti A. Riekkinen
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · May 24, 1997
Departed
N82 · NY
Destination
N82
Airport
N82 · Wurtsboro-Sullivan County, runway 23, 3,577 × 50 ft, asphalt

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
59
Certificate
Private
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Rear
Toxicology
Performed
Flight hours
4,174 total

Weather

Conditions
Visual (VMC) · Day
Wind
60° at 4 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 52 °F
Altimeter
30.00 inHg
Observed at
SWF, 23 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.