CHI01LA250

NTSB accident investigation · Burkhart Grob G102 STD Astir III · Faribault, MN · July 29, 2001

Accident · Serious injuriesLimited investigationFinal report
Date
July 29, 2001, 16:00 local (21:00 UTC)
Place
Faribault, MN
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N3837UBurkhart Grob G102 STD Astir III
Weather
Visual (VMC) · Day
Status
Completed · report December 6, 2002
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20010729018859A
Case key
52920

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 adequate airspeed during the landing which resulted in a stall.

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 flightLanding
Airspeed - not maintainedPilot in commandCause
Stall - encounteredPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The glider sustained substantial damage while landing when the left wing and fuselage impacted terrain. The pilot sustained serious injuries. A police report stated, "[The pilot] said while he was turning, he forgot to monitor his air speed and the glider fell below the minimum speed, which caused his left wing to stall. [The pilot] said his left wing hit the ground during the turn and caused the glider to somersault onto the gliders belly and spin. The pilot stated that there were no mechanical malfunctions or failures. The wind was 160 degrees at 7 knots.

Factual narrative

On July 29, 2001, about 1600 central daylight time, a Burkhart Grob G102 STD ASTIR III, N3837U, piloted by a private pilot, sustained substantial damage when the glider's left wing and fuselage impacted terrain at Faribault Municipal Airport (FBL), near Faribault, Minnesota. The personal flight was operating under 14 CFR part 91. Visual meteorological conditions prevailed at the time of the accident. No flight plan was on file. The pilot sustained serious injuries. The local flight departed from FBL at 1510 and was landing at the time of the accident.

In his written statement, the pilot noted:

Abreast of the landing point I verified that I was approximately 800 feet

Agl [above ground level]. Proceeded to normal left turns for Base Leg

and Final Leg and announced. The initial Final Glide was done using

1/2 spoiler setting. On approaching Hwy. 21 I encountered strong lift

and started using full spoiler setting. At the intersection of runways 20

and 30 I became very concerned about my altitude and decided that

landing on Rwy 20 was no longer possible because of the tall trees at

the end of the Runway. I decided to execute a 270-degree turn to my

left to loose altitude and allow me to land on the remaining portion of

Rwy 30. At this point, I became fearful of the outcome of this flight. I did

not loose consciousness but do not remember anything from the time

of initiating the turn, up to the final contact with the ground.

A Rice County Law Enforcement incident report stated:

[The pilot] said while he was turning, he forgot to monitor his air speed and

the glider fell below the minimum speed, which caused his left wing to stall.

[The pilot] said his left wing hit the ground during the turn and caused the

glider to somersault onto the gliders belly and spin.

The pilot stated that there were no mechanical malfunctions or failures.

At 1557, the FBL weather was: Wind 160 degrees at 7 knots; visibility 10 statute miles; sky condition clear; temperature 29 degrees C; dew point 19 degrees C; altimeter 29.93 inches of mercury.

Aircraft

Registration
N3837U
Reported as
Burkhart Grob G102 STD Astir III
Category
Glider
Serial number
5576S
Airframe hours
578
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Peter G. Bolseta & Troy Gregory
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 21, 2000 · 9.2 hours before
Departed
FBL · Faribault, MN
Airport
FBL · Faribault Muni, runway 20, 2,230 × 140 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
54
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
November 6, 1999
Seat
Center
Flight hours
515 total · 9 in this make and model · 382 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 66 °F
Altimeter
29.93 inHg
Observed at
FBL

FAA reports on this event · 1

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