FTW02LA219

NTSB accident investigation · Schempp-Hirth K.G. Nimbus-2C · Briggs, TX · July 21, 2002

Accident · No injuriesLimited investigationFinal report
Date
July 21, 2002, 17:30 local (22:30 UTC)
Place
Briggs, TX
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N141SFSchempp-Hirth K.G. Nimbus-2C
Weather
Visual (VMC) · Day
Status
Completed · report April 1, 2003
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20020721016939A
Case key
55328

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 clearance with the high grass during the landing roll, which resulted in a ground loop.

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.

On ground/water encounter with terrain/waterLanding - roll
Clearance - not maintainedPilot in commandCause
Terrain condition - high vegetation
Terrain condition - grass
Ground loop/swerve - inadvertentPilot in command

Analysis

During the landing roll, on 300-foot wide grass airstrip, the right wing of the glider dropped and struck the tall grass adjacent to the runway. Subsequently, the glider ground-looped and came to rest on a 340 degree magnetic heading. The tailboom was fractured at the leading edge of the stabilizer. The pilot stated the wind was approximately 3 to 5 knots from the south. The wing span of the glider was approximately 66 feet.

Factual narrative

On July 21, 2002, approximately 1730 central daylight time, a Schempp-Hirth K.G. Nimbus-2C glider, N141SF, sustained substantial damaged when it encountered high vegetation during the landing roll on a grass airstrip at the private FLF Gliderport, Briggs, Texas. The commercial pilot, sole occupant and registered owner of the glider, was not injured. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The local flight departed the FLF Gliderport, approximately 1310.

According to the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2), the pilot reported that he had completed a 4.3 hour flight. During the landing roll on runway 16 (4,500 feet in length and 300 feet in width), the right wing dropped and struck the tall grass adjacent to the runway. Subsequently, the glider ground-looped and came to rest on a 340 degree magnetic heading. The tailboom was fractured at the leading edge of the stabilizer. The pilot stated the wind was approximately 3 to 5 knots from the south.

In the NTSB Form 6120.1/2 "Recommendation (How Could This Have Been Prevented)" section, the pilot reported the following, "1. Avoid tall grass on landing, 2. Make wheel landing with sufficient airspeed margin to allow selection of negative flap position to retain aileron authority as long as possible on roll out."

The wing span of the glider was approximately 66 feet.

Aircraft

Registration
N141SF
Reported as
Schempp-Hirth K.G. Nimbus-2C
Category
Glider
Serial number
220
Airframe hours
1,029.7
Engine
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
George W. P. Reinhart
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · March 16, 2002 · 21.4 hours before
Departed
TX23 · Briggs, TX
Destination
TX23 · Briggs, TX
Airport
TX23 · Flf, runway 16, 4,500 × 300 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
61
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--no waivers/lim.
Last flight review
January 21, 2002
Seat
Center
Flight hours
1,366 total · 21 in this make and model · 1,334 as pilot in command · 23 in the last 90 days · 13 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
95 °F

Docket · 1

The files NTSB released with the investigation on December 3, 2002, on NTSB’s docket system: statements, records, photos and specialists’ reports. 501 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.