CEN12LA566

NTSB accident investigation · Thorp T-18 · Gilmer, TX · August 21, 2012

Accident · Serious injuriesLimited investigationFinal report
Date
August 21, 2012, 17:40 local (22:40 UTC)
Place
Gilmer, TX
Injuries
2 serious
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N2443Thorp T-18
Defining event
Initial climb: Fuel starvation
Weather
Visual (VMC) · Day
Status
Completed · report January 31, 2013
Report
Approved by Office Director
NTSB office
Central Region
Parties
Continental Motors, Federal Aviation Administration
FAA report
20120821019029A
Case key
84768

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The disconnected metering unit fuel line, which resulted in a loss of engine power.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Fuel system: fuel distributionAircraft › Aircraft systems · Incorrect service/maintenanceThorp T-18: 1 caseAll aircraft: 141 cases
Fuel system: fuel distributionAircraft › Aircraft systems · MalfunctionThorp T-18: 1 caseAll aircraft: 141 casesProbable cause
Maintenance: installationPersonnel issues › Task performance · Maintenance personnelThorp T-18: 1 caseAll aircraft: 371 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

Shortly after takeoff, the engine lost power, and the pilot performed a forced landing to wooded terrain. Examination of the engine revealed the fuel line from the fuel pump to the metering unit was disconnected at the metering unit. This disconnection would result in a loss of engine power. No additional anomalies were noted during the airframe and engine examination.

Factual narrative

On August 21, 2012, approximately 1740 central daylight time, a Thorp T-18 experimental amateur-built airplane, N2443, sustained substantial damage when it impacted terrain during an attempted takeoff from Gilmer Municipal Airport (JXI), Gilmer, Texas. The airline transport pilot sustained minor injuries, and the pilot-rated passenger sustained serious injuries. The airplane was registered to McClendon Associates and operated by the pilot under the provisions of the 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed for the flight, which was not operated on a flight plan. The flight was destined for Denton, Texas. According to the pilot, the fuel tanks were 3/4 full. Prior to takeoff, the pilot completed an engine run up with no problems noted. Shortly after takeoff, the engine rpm rolled back from 2,300 to 1,500 rpm. The pilot attempted to restore engine power; however, he was unsuccessful. The pilot executed a forced landing to tree-covered terrain. The airplane impacted several trees and came to rest upright. A review of the engine maintenance records showed the engine underwent a conditional inspection on September 1, 2011, at a tachometer time of 930.9 hours. The engine was overhauled on March 23, 2003, at a tachometer time of 593.4 hours. On September 21, 2012, at the facilities of Air Salvage of Dallas, Lancaster, Texas, the engine was examined under the supervision of a Federal Aviation Administration inspector. Examination of the engine revealed that the fuel line from the fuel pump to the metering unit was disconnected at the metering unit. No other anomalies were noted with the engine during the examination.

Aircraft

Registration
N2443
Reported as
Thorp T-18
Category
Airplane, amateur-built
Serial number
536
Airframe hours
780
Engine
Continental Motors IO-346-A, 165 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · September 1, 2011
Departed
JXI · Gilmer, TX
Destination
DTO · Denton, TX
Airport
JXI · Gilmer Municipal Airport

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
58
Injuries
Serious
Certificates
Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
September 10, 2011
Seat
Left
Flight hours
11,000 total · 60 in this make and model · 8,000 as pilot in command · 12 in the last 90 days · 4 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F

Docket · 3

The files NTSB released with the investigation on December 3, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 5.5 MB in all.

FAA reports on this event · 1

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