FTW94LA010

NTSB accident investigation · Emmert Tierra II · Yukon, OK · October 11, 1993

Accident · Serious injuriesLimited investigationFinal report
Date
October 11, 1993, 17:13 local (22:13 UTC)
Place
Yukon, OK
Injuries
2 serious
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N246REEmmert Tierra II
Weather
Visual (VMC) · Day
Status
Completed · report August 1, 1994
Report
Approved by Office Director
FAA report
19931011044799A
Case key
18951

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

Was an inadvertent stall. A factor was the gusty tailwind.

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
Weather condition - gustsFactor
Weather condition - tailwindFactor
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The pilot took off and was turning left crosswind when the airplane suddenly rolled further to the left and stalled. The pilot was recovering when the airplane struck the ground. The pilot's opinion was that a right quartering tailwind gust caused the airplane to stall.

Factual narrative

On October 11, 1993, approximately 1713 central daylight time, an Emmert Tierra II, N246RE, was destroyed during an uncontrolled descent shortly after taking off from Clarence E. Page Airport, Yukon, Oklahoma. The two pilots aboard received serious injuries. Visual meteorological conditions prevailed for the personal flight.

The following is based on the Pilot/Operator report. The pilot had just taken off from runway 17L and was turning left onto the crosswind leg when the airplane suddenly rolled further to the left, stalled, and spun approximately 150 degrees. The pilot was able to arrest the spin and was in the process of recovering when the airplane struck the ground. The pilot said he thought a right quartering gust of wind caused the airplane to stall.

Aircraft

Registration
N246RE
Reported as
Emmert Tierra II
Category
Airplane, amateur-built
Serial number
2467E
Airframe hours
31
Engine
Rotax 532 UL, 64 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Emmert, Raymond L.
Registered owner
Emmert, Raymond L.
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Unknown · October 31, 1992 · 14 hours before
Departed
F29 · Oklahoma City, OK
Airport
F29 · Clarence E. Page, runway 17L, 3,502 × 75 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
Age
52
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
1,270 total · 31 in this make and model · 1,250 as pilot in command · 4 in the last 90 days · 1 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 8 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 41 °F
Altimeter
30.00 inHg
Observed at
PWA, 9 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.