ATL95LA093

NTSB accident investigation · Let L-23 Super Blanik · Spartanburg, SC · April 29, 1995

Accident · Minor injuriesLimited investigationFinal report
Date
April 29, 1995, 16:05 local (20:05 UTC)
Place
Spartanburg, SC
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N152ATLet L-23 Super Blanik
Weather
Visual (VMC) · Day
Status
Completed · report August 23, 1995
Report
Approved by Office Director
FAA report
19950429009899A
Case key
3557

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 inadvertent use speed brakes during takeoff.

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.

In flight collision with terrain/waterTakeoff - aborted
Flight control,speed brake - activated
Speed brakes - inadvertent activationPilot in commandCause

Analysis

The pilot reported that the glider was not gaining sufficient airspeed during the takeoff roll. The tow plane pilot released the glider, and the takeoff was aborted. Due to obstructions at the departure end of the runway, the pilot attempted to maneuver the glider into an open area. The left wing contacted the ground first, and the glider ground looped. Structural damage to the wings and fuselage resulted. The pilot reported that when he was exiting the glider, he noticed that the speed brakes were in the deployed position, which correlated with the position of the speed brake handle.

Factual narrative

On April 29, 1995, at 1605 eastern daylight time, a LET L-23 Super Blanik, N152AT, was substantially damaged during an aborted takeoff at the Spartanburg Downtown Memorial Airport, Spartanburg, South Carolina. The private pilot was not injured, and his passenger had minor injuries. The glider was operated under the provisions of 14 CFR Part 91 by the pilot. Visual meteorological conditions existed at the time, and no flight plan was filed for the local, personal flight. The flight was originating at the time of the accident.

The pilot reported that the glider was not gaining sufficient airspeed during the takeoff roll. The tow plane pilot released the glider, and the takeoff was aborted. Due to obstructions at the departure end of the runway, the pilot attempted to maneuver the glider into an open area. The left wing contacted the ground first, and the glider ground looped. Structural damage to the wings and fuselage resulted. The pilot reported that when he was exiting the glider, he noticed that the speed brakes were in the deployed position, which correlated with the position of the speed brake handle.

Aircraft

Registration
N152AT
Reported as
Let L-23 Super Blanik (L-23 SUPER)
Category
Glider
Serial number
917924
Airframe hours
100
Engine
unknown
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Harald W. Behrend
Registered owner
David E. Treinis
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 17, 1994 · 10 hours before
Departed
SPA
Airport
SPA · Spartanburg Downtown, runway 5, 5,200 × 100 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
54
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
1,919 total · 7 in this make and model · 1,819 as pilot in command · 19 in the last 90 days · 6 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
100° at 3 knots
Visibility
30 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 46 °F
Altimeter
29.00 inHg
Observed at
GSP, 15 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.