MIA99LA227

NTSB accident investigation · Let Blanik L-13 · Perry, SC · August 17, 1999

Accident · No injuriesLimited investigationFinal report
Date
August 17, 1999, 15:00 local (19:00 UTC)
Place
Perry, SC
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N7529Let Blanik L-13
Weather
Visual (VMC) · Day
Status
Completed · report March 2, 2001
Report
Approved by Office Director
FAA report
19990817012689A
Case key
47123

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

an in-flight collision with the ground due to inadequate liftoff airspeed, and the pilot's improper use of flaps, which resulted in too low of an altitude to sustain flight.

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/waterManeuvering
Object - tree(s)Factor
Flaps - inadvertent activationPilot in commandCause
Airspeed(vlof) - inadequate
Altitude - low

Analysis

The glider was being launched by an automobile, and according to the pilot, '...lack of airspeed for adequate climb was generated and resulting release was low 100-150 feet.' The pilot performed a left turn 90 degrees because he did not have sufficent altitude to return to airport. He elected to land in a field adjacent to the airport. He said, 'I inadvertently deployed flaps instead of spoilers resulting in excess float.' Just before the end of the field he turned right to avoid trees. The right wing impacted the ground followed by the nose and left wing.

Factual narrative

On August 17, 1999, about 1500 eastern daylight time, a Let Blanik L-13 glider, N7529, registered to the Perry Soaring Association, collided with the ground during takeoff at the Perry Airport, Perry, South Carolina. Visual meteorological conditions prevailed at the time, and no flight plan was filed for the 14 CFR Part 91 local personal flight. The glider was substantially damaged. The private-rated pilot and one passenger reported no injuries. The flight was originating at the time.

The glider was being launched by an automobile, and according to the pilot, "...lack of airspeed for adequate climb was generated and resulting release was low 100-150 feet. A left turn 90 degrees was made and I decided I did not have altitude to return to airport. I elected to land in field adjacent to airport...large enough for normal off field landing...I inadvertently deployed flaps instead of spoilers resulting in excess float. Just prior to end of field a right turn was made to avoid trees. The right wing impacted ground followed by nose and opposite wing."

Aircraft

Registration
N7529
Reported as
Let Blanik L-13 (BLANIK L-1)
Category
Glider
Serial number
025524
Engine
unknown
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Perry Soaring Assoc.
Airworthiness certificate
Standard, Normal
Airport
SC95 · Perry International, runway 7, 5,000 × 100 ft, grass/turf

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
44
Certificate
Private
Medical
Unknown
Seat
Rear
Flight hours
250 total · 50 in this make and model · 190 as pilot in command · 25 in the last 90 days · 9 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
91 °F, dew point 72 °F
Altimeter
29.00 inHg
Observed at
AGS, 45 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.