ERA09CA332

NTSB accident investigation · Teratorn Tierra · Cutchogue, NY · June 7, 2009

Accident · No injuriesData collectionFinal report
Date
June 7, 2009, 09:09 local (13:09 UTC)
Place
Cutchogue, NY
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
UnregisterTeratorn Tierra
Defining event
Initial climb: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed · report September 10, 2009
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA FSDO
Case key
73989

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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Probable cause

The pilot's decision to attempt takeoff from unsuitable terrain.

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.

Engine (reciprocating)Aircraft › Aircraft power plant · MalfunctionAll aircraft: 497 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomeAll aircraft: 933 cases
Info processing/decision: decision making/judgmentPersonnel issues › Action/decision · PilotAll aircraft: 3,098 casesProbable cause

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

The pilot stated that he recently installed a newly rebuilt engine in his unregistered experimental amateur-built airplane and completed a 1-hour break-in procedure the day prior to the accident. He was departing from a soft field and he believed that the engine got wet or that the propeller was damaged by mud or rocks during the takeoff, reducing thrust. The airplane gained only 40 to 50 feet of altitude before it impacted trees. The airplane incurred substantial damage to the empennage. The reason for loss of engine power was not determined. The pilot stated he should have taken the airplane back to his home base and not attempted the takeoff from the soft field.

Factual narrative

The pilot stated that he recently installed a newly rebuilt engine in his unregistered experimental amateur-built airplane and completed a 1-hour break-in procedure the day prior to the accident. He was departing from a soft farmer’s field and he believed the engine got wet or the propeller was damaged by mud or rocks during the takeoff, reducing thrust. The airplane gained only 40 to 50 feet of altitude before it impacted trees. The airplane incurred substantial damage to the empennage. The reason for loss of engine power was not determined. The pilot stated he should have taken the airplane back to his home base and not attempted the takeoff from the soft field.

Aircraft

Registration
Unregister
Reported as
Teratorn Tierra (II)
Category
Airplane, amateur-built
Serial number
n/a
Airframe hours
341
Engine
Rotax 503, 50 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Departed
Cutchogue, NY
Destination
21N · Mattituck, NY

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
42
Injuries
None
Seat
Single
Flight hours
300 total · 2 in this make and model · 280 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
160 °F, dew point 127 °F
Altimeter
29.97 inHg
Observed at
FOK, 8 nm away

Docket · 2

The files NTSB released with the investigation on July 10, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.7 MB in all.