Thompson Airport
Aircraft Accident/Incident Report

West Branch, Michigan 48661
Thursday, September 8, 1994 22:40 EDT

NTSB Narrative Summary Released at Completion of Accident

THE PILOT REPORTED THAT HE ATTEMPTED TO TAKEOFF AT A PRIVATE FIELD ON AN 1,800 FOOT LONG RUNWAY. THE RUNWAY SURFACE CONSISTED OF WET GRASS ABOUT SIX INCHES TALL. HE SAID HE CALCULATED THE TAKEOFF DISTANCE ON A GRASS RUNWAY TO BE 880 FEET. ABOUT THREE FOURTHS OF THE WAY DOWN THE RUNWAY, THE PILOT FELT THE AIRPLANE WAS NOT GOING TO BECOME AIRBORNE. HE ABORTED THE TAKEOFF AND THE AIRPLANE DEPARTED THE END OF THE RUNWAY, SUSTAINING SUBSTANTIAL DAMAGE.

NTSB Probable Cause Narrative

the pilot's improper preflight planning in estimating the takeoff distance. The tall, wet grass on the runway was a factor.

Event Information

Type of Event Accident
Event Date 9/8/1994
Event Day of the Week Thursday
Time of Event 2240
Event Time Zone Eastern Daylight Time
Event City WEST BRANCH
Event State MICHIGAN
Event Country --
Zipcode of the event site 48661
Event Date Year 1994
Event Date Month 9
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport THOMPSON AIRPORT
Event Location Nearest Airport ID
Indicates whether the acc/inc occurred off or on an airport On Airport
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation 857
Weather Briefing Completeness Not pertinent
Investigator's weather source Pilot
Time of the weather observation 2250 Central Daylight Time
Direction of event from weather observation facility (degrees) 185
Weather Observation Facility ID MBS
Elevation of weather observation facility 668
Distance of event from weather observation facility (units?) 48
Time Zone of the weather observation CDT
Lighting Conditions Night/Bright
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 12
Air Temperature at event time (in degrees celsius) 16
Dew Point at event time (in degress fahrenheit) 11
Wind Direction (degrees magnetic) 250
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) 850
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None 2
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 1382
NTSB Notification Source --
NTSB Notification Date Aug 9 1994 12:00AM
NTSB Notification Time 132
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 6 2000 12:13PM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N4286E
NTSB Number CHI94LA318
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 PIPER
Aircraft Model PA-38-112
Aircraft Series Identifier PA-38-112
Aircraft Serial Number 38-780530
Certified Max Gross Weight 1670
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Sep 6 1994 12:00AM
Airframe hours since last inspection 0
Airframe Hours 5876
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name WESTWIND AVIATION INC.
Aircraft Owner Street Address 659 EDEN ROAD
Aircraft Owner City MASON
Aircraft Owner State MI
Aircraft Owner Country
Aircraft Owner Zipcode 48854
Operator is an individual? --
Operator Name WESTWIND AVIATION
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address 659 EDEN ROAD
Operator City MASON
Operator State MI
Operator Country
Operator Zip code 48854
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 0
Departure Time Zone
Destination Same as Local Flt --
Destination Airport Code 09G
Destination City MASON
Destination State MI
Destination Country
Specific Phase of Flight Takeoff
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 16
Runway Length 1800
Runway Width 100
Sight Seeing flight No
Air Medical Flight No
Medical Flight --