Aircraft Accident/Incident Report

East Quogue, New York 11942
Monday, June 20, 1994 15:04 EDT

NTSB Narrative Summary Released at Completion of Accident

The airplane was being flown for the first time in about 4 years when the engine lost power during a local flight at an altitude of 4500 feet msl. The pilot did a forced landing on a the side of a highway and the airplane nosed over during the landing. Examination of the airplane revealed the number four cylinder spark plugs were oil fouled. The engine had been overhauled about a month before the accident.

NTSB Probable Cause Narrative

Inadequate maintenance which resulted in oil-fouled spark plugs and the loss of engine power.

Event Information

Type of Event Accident
Event Date 6/20/1994
Event Day of the Week Monday
Time of Event 1504
Event Time Zone Eastern Daylight Time
Event City EAST QUOGUE
Event State NEW YORK
Event Country --
Zipcode of the event site 11942
Event Date Year 1994
Event Date Month 6
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport
Event Location Nearest Airport ID
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles 3
Degrees magnetic from airport 270
Airport Elevation 67
Weather Briefing Completeness Not pertinent
Investigator's weather source Weather Observation Facility
Time of the weather observation 1445 Eastern Daylight Time
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID FOK
Elevation of weather observation facility 67
Distance of event from weather observation facility (units?) 3
Time Zone of the weather observation EDT
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 1500
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 15
Air Temperature at event time (in degrees celsius) 24
Dew Point at event time (in degress fahrenheit) 14
Wind Direction (degrees magnetic) 150
Variable Wind Indicator Unknown
Wind Speed (knots) 8
Wind Velocity Indicator Unknown
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 30
Density Altitude (feet) --
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury Minor
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor 1
Injury Total None --
Injury Total Serious --
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 1130
NTSB Notification Source --
NTSB Notification Date Jun 20 1994 12:00AM
NTSB Notification Time 1842
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 6 2000 11:30AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N64628
NTSB Number NYC94LA101
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name JONES
Aircraft Model THORP T-18
Aircraft Series Identifier THORP T-18
Aircraft Serial Number 825
Certified Max Gross Weight 1500
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? Yes
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 1
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Jun 16 1994 12:00AM
Airframe hours since last inspection 2
Airframe Hours 279
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name THEODORE MCLAM, JR.
Aircraft Owner Street Address 4 DEBBIE LANE
Aircraft Owner City WESTHAMPTON
Aircraft Owner State NY
Aircraft Owner Country
Aircraft Owner Zipcode 11978
Operator is an individual? --
Operator Name
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address
Operator City
Operator State
Operator Country
Operator Zip code
Operator Code
Owner has at least one certificate None
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Unknown
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board No
Departure Point Same as Event Yes
Departure Airport Code
Departure City
Departure State
Departure Country
Departure Time 1430
Departure Time Zone EDT
Destination Same as Local Flt --
Destination Airport Code FOK
Destination City WESTHAMPTON BCH
Destination State NY
Destination Country
Specific Phase of Flight Cruise
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:34AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 0
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --