FTW85LA127

NTSB accident investigation · Thorpe T-18 · Ada, OK · February 24, 1985

Accident · Serious injuriesLimited investigationFinal report
Date
February 24, 1985, 13:40 local (19:40 UTC)
Place
Ada, OK
Injuries
1 serious
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N40HBThorpe T-18
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19850224056189A
Case key
21680

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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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) - nonmechanicalTakeoff - initial climb
Fuel system,tank - deterioratedCause
Maintenance - inadequateCause
Aircraft preflight - inadequatePilot in commandCause
Fuel system,strainer - blocked(total)
Fluid,fuel - starvationCause
Forced landingDescent - emergency
Loss of control - in flightDescent - emergency
Airspeed - not maintainedPilot in commandCause
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The aircraft had been stored for 8 months with automotive fuel in the tank. During takeoff, the eng lost power. Subsequently, the plt lost control & the acft impacted the ground at a 45 deg angle. An investigation revealed that softened tank sealant material was obstructing the tank strainer screen.

Aircraft

Registration
N40HB
Reported as
Thorpe T-18
Category
Airplane, amateur-built
Serial number
165
Airframe hours
537
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Harry D. Bingman
Airworthiness certificate
Special, Experimental (Special)
Airport
ADH · Ada Municipal, runway 35, 5,000 × 150 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
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 6 knots
Visibility
15 statute miles
Lowest ceiling
2,000 ft overcast
Temperature
46 °F, dew point 37 °F
Altimeter
30.00 inHg
Observed at
MLC, 44 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.