FTW95LA299

NTSB accident investigation · Slingsby T-51 · Odessa, TX · July 15, 1995

Accident · Serious injuriesLimited investigationFinal report
Date
July 15, 1995, 15:20 local (20:20 UTC)
Place
Odessa, TX
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N88966Slingsby T-51
Weather
Visual (VMC) · Day
Status
Completed · report December 19, 1995
Report
Approved by Office Director
FAA report
19950715024599A
Case key
19500

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 failure to maintain airspeed required for flight, resulting in an inadvertent stall/spin at low altitude. A factor was the windshear.

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 flightApproach - vfr pattern - base turn
Weather condition - windshearFactor
Altitude - low
Airspeed - not maintainedPilot in commandCause
Stall/spin - inadvertentPilot in commandCause
In flight collision with objectDescent - uncontrolled
Object - fence
In flight collision with terrain/waterDescent - uncontrolled

Analysis

According to the pilot, he 'encountered [a] strong sink and associated windshear turbulence', while on a base leg turn for landing. During the turn to final, the 'glider's right wing dropped [and] the nose pitched down [resulting] in a stall/spin.' During recovery from the spin, the glider's right wing struck a fence. Two witnesses observed the glider 'cartwheel' following contact with the fence. Both wings, and the tail section were found separated from the fuselage.

Factual narrative

On July 15, 1995, at 1520 central daylight time, a Slingsby T-51 glider, N88966, was substantially damaged when it struck a fence following a loss of control during approach to Schlemeyer Field, near Odessa, Texas. The private pilot sustained serious injuries. The glider, owned by the pilot, was being operated under Title 14 CFR Part 91 when the accident occurred. No flight plan was filed and visual meteorological conditions prevailed.

According to the pilot, he "encountered [a] strong sink and associated windshear turbulence" while on a base leg turn for landing on runway 16L. He further reported that, during his turn to final, the glider's "right wing dropped [and] the nose pitched down [resulting] in a "stall/spin." During recovery from the spin, the glider's right wing struck a fence. Two witnesses observed the glider "cartwheel" following contact with the fence.

The glider came to rest inverted. Both wings, and the tail section, were found separated from the fuselage.

Aircraft

Registration
N88966
Reported as
Slingsby T-51
Category
Glider
Serial number
1437
Airframe hours
1,075
Engine
unknown
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Tracy L. Clinkenbeard, Jr.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 20, 1994 · 20 hours before
Departed
E02

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
39
Certificate
Private
Medical
Unknown
Seat
Center
Flight hours
258 total · 145 in this make and model · 208 as pilot in command · 23 in the last 90 days · 9 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
130° at 12 knots, gusting 17
Visibility
20 statute miles
Lowest ceiling
None
Temperature
91 °F, dew point 55 °F
Altimeter
30.00 inHg
Observed at
MAF, 12 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.