SEA91LA098

NTSB accident investigation · Richard Cheney Teratorn Tierra II · Morgan, UT · May 5, 1991

Accident · Serious injuriesLimited investigationFinal report
Date
May 5, 1991, 12:50 local (18:50 UTC)
Place
Morgan, UT
Injuries
1 serious
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N134TARichard Cheney Teratorn Tierra II
Weather
Visual (VMC) · Day
Status
Completed · report February 8, 1993
Report
Approved by Office Director
FAA report
19910505014079A
Case key
41423

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 inadvertant stall and the pilot's steep banked turn. Factors relating to the accident were the pilot's lack of qualification to conduct the flight and the strong tailwind conditions.

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 control - in flightTakeoff - initial climb
Maneuver - excessivePilot in commandCause
QualificationPilot in commandFactor
Weather condition - tailwindFactor
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The acft lifted off after a short takeoff roll, climbed to about 200 ft AGL, and the pilot initiated a steep downwind turn in strong wind conditions. The acft stalled, descended nose down, and impacted terrain. The pilot held an expired student pilot certificate.

Aircraft

Registration
N134TA
Reported as
Richard Cheney Teratorn Tierra II (TERATORN T)
Category
Ultralight, amateur-built
Serial number
9473
Airframe hours
135
Engine
Rotax 532, 65 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
Edward R. Olson
Registered owner
Edward R. Olson
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · September 5, 1986 · 72 hours before
Departed
42U · Morgan, UT
Airport
42U · Morgan County

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
36
Certificate
Student
Medical
Class 3, Expired

Weather

Conditions
Visual (VMC) · Day
Visibility
15 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point -0 °F

FAA reports on this event · 1

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