NYC95LA173

NTSB accident investigation · Ryan ST3-KR · Kennett Square, PA · July 21, 1995

Accident · Minor injuriesLimited investigationFinal report
Date
July 21, 1995, 18:00 local (22:00 UTC)
Place
Kennett Square, PA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N47082Ryan ST3-KR
Weather
Visual (VMC) · Day
Status
Completed · report February 27, 1996
Report
Approved by Office Director
FAA report
19950721048859A
Case key
39014

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 failure of the no. 3 cylinder connecting rod.

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 engine power(total) - mech failure/malfCruise
Engine assembly,connecting rod - failureCause
Forced landingDescent - emergency
Hard landingDescent - emergency
Terrain condition - grass

Analysis

The pilot was returning to the departure airport after a 2 1/2 hour flight. Several miles from the airport, the engine began to run rough, followed by complete loss of power. The pilot performed a forced landing to a private sod strip. On final, after the aircraft cleared trees, the pilot was not able to arrest the descent rate, and the landing gear collapsed during touchdown. The engine was a Kinner R-56 manufactured in 1946, and had accumulated about 120 hours since overhaul. Examination of the engine revealed that the number three cylinder connecting rod failed at the knuckle pin.

Factual narrative

On July 21, 1995, at 1800 eastern daylight time, a Ryan ST3- KR, N47082, was substantially damaged during a forced landing to the Whittle Airport, Kennett Square, Pennsylvania. The commercial pilot was not injured. Visual meteorological conditions prevailed, for the personal flight that departed the New Garden Airport, Toughkenamon, Pennsylvania, about 1630. No flight plan had been filed for the flight conducted under 14 CFR Part 91.

In the NTSB Form 6120.1/2, the pilot stated that he was returning to the departure airport after a 2 1/2 hour local flight. He further stated that while still several miles from the New Garden Airport, the "engine began to run rough and almost immediately seized."

The pilot stated he attempted a forced landing to a private sod strip; however, after clearing trees at the end of the runway, he could not arrest the rate of descent, and the landing gear collapsed during touchdown. The pilot stated that the engine was a Kinner R-56, manufactured in 1946. The engine had accumulated about 120 hours since overhaul.

According to a Federal Aviation Administration (FAA) Inspector, examination of the engine revealed that the number three cylinder rod failed at the knuckle pin.

Aircraft

Registration
N47082
Reported as
Ryan ST3-KR
Category
Airplane
Serial number
1443
Engine
Kinner R-56, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Alexis I. Dupont
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 9, 1995 · 6 hours before
Departed
N57 · Toughkenamon, PA
Airport
1PA6 · Whittle, runway 6, 2,000 × 100 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
67
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Rear
Flight hours
4,500 total · 100 in this make and model · 4,000 as pilot in command · 50 in the last 90 days · 25 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
330° at 5 knots
Visibility
5 statute miles
Lowest ceiling
None
Temperature
90 °F

FAA reports on this event · 1

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