MIA03LA022

NTSB accident investigation · Let L-23 · Groveland, FL · November 29, 2002

Accident · No injuriesLimited investigationFinal report
Date
November 29, 2002, 16:30 local (21:30 UTC)
Place
Groveland, FL
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N41BWLet L-23
Weather
Visual (VMC) · Day
Status
Completed · report November 25, 2003
Report
Approved by Office Director
Parties
FAA
Case key
56153

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 extend the dive brakes during approach and his excessive airspeed and improper landing flare which resulted in the airplane nosing down and impacting with the runway.

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.

Hard landingLanding - flare/touchdown
Spoiler extension - not deployedPilot in commandCause
Airspeed - excessivePilot in commandCause
Flare - improperPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - runway

Analysis

Witnesses saw the glider heading south about 8 to 10 feet above the runway surface, at a fast rate of speed, spoilers not deployed, and intending to land. The witnesses observed the glider flare several feet above the runway, pull up at a high angle of attack, and high rate of speed. Before coming to rest the glider began a "wheelbarrow" effect with several pull-ups and descents several times, nosed down at about 30 degree angle, and impact the runway surface very hard. An examination of the dive brakes after the accident did not reveal any discrepancies. The pilot was given an NTSB Pilot/Operator Accident Report Form 6120.1/2 by the FAA inspector, but a completed form was not received by the NTSB.

Factual narrative

On November 29, 2002, about 1630 eastern standard time, a LET L-23 glider, N41BW, registered to and operated by Seminole Flying and Soaring Inc., impacted with the ground during a landing at the Seminole Lake Gliderport, Groveland, Florida. Visual meteorological conditions prevailed at the time and no flight plan was filed for the 14 CFR Part 91 personal flight. The glider was substantially damaged. The commercial-rated pilot reported no injuries. The flight had originated from the same airport at 1600.

Witnesses standing about 113 feet from the runway threshold, saw the glider pass along the runway heading in a southerly direction about 8 to 10 feet above the runway surface, at a fast rate of speed, intending to land, and the spoilers were not deployed. They watched the landing procedure until the glider came to a complete stop. The witnesses observed the glider flare "several feet above the surface." The pilot began pulling the glider up at a high "angle of attack," and "high rate" of speed; the glider began a "…wheelbarrow effect with several pull-ups and descents." After several climbs and descent actions, the glider nosed down at a "steep angle at about 30 degrees," and contacted the runway surface very hard.

According to the FAA inspector, the pilot said he deployed the dive brakes on base leg, and that he retracted them in order to land further down the runway. The pilot told the inspector that he could not deploy the dive brakes on final. An examination of the dive brakes after the accident did not reveal any discrepancies. The pilot was given an NTSB Pilot/Operator Accident Report Form 6120.1/2 by the FAA inspector, but a completed form was not received by the NTSB.

Aircraft

Registration
N41BW
Reported as
Let L-23
Category
Glider
Serial number
917921
Airframe hours
2,885
Engine
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Seminole Flying and Soaring Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 20, 2002 · 65 hours before
Departed
6FL0 · Groveland, FL
Airport
6FL0 · Seminole Lake, runway 18, 3,000 × 200 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
72
Injuries
None
Certificates
Commercial, Private
Airplane ratings
Single-engine land
Medical
Class 3, Expired
Last flight review
May 4, 2002
Seat
Front
Flight hours
400 total · 70 in this make and model · 5 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 8 knots, gusting 14
Visibility
10 statute miles
Lowest ceiling
2,900 ft overcast
Temperature
66 °F, dew point 55 °F
Altimeter
29.98 inHg
Observed at
LEE, 20 nm away