Pilot Debrief

THUNDERBIRD AVIATION TOP DOG UL near Luling, TX — 2010-05-29

Final reportCEN10LA279
Sign in to save
Date
2010-05-29
Location
Luling, TX, USA
Airport
KT91
Aircraft
THUNDERBIRD AVIATION TOP DOG UL
Registration
N2574V
Category
Trike
Highest injury
Serious
Fatalities
0
Phase of flight
Takeoff roll

Probable cause

Poor engine performance due to the modified engine parameters and installation of the fuel nozzles which produced a lean fuel condition resulting in decreased aircraft performance and subsequent impact with the trees.

NTSB narrative

While attempting to take off, the airplane impacted a tree line and terrain. A postaccident engine examination revealed signs of inadequate maintenance, including finger-tight spark plugs, an obstructed air vent line, and evidence of water intrusion in the carburetor bowls. An engine test run determined that full power could not be achieved with the combination of installed engine components. The installed main jets produced a lean fuel condition that resulted in a loss of engine power before maximum rpm could be achieved. After replacing the components with stock components, the engine produced normal engine performance.

Analysis

Primary failure mode
Engine power loss
First missed decision gate
Pilot could have checked engine performance before takeoff.

NTSB coding

Evidence available

  • Photos
  • 3 docket documents
View NTSB final reportView NTSB docket

Docket documents3

Related mishaps