NYC99LA017

NTSB accident investigation · Burkhart Grob G103-TWINA · Saratoga Spring, NY · October 24, 1998

Accident · No injuriesLimited investigationFinal report
Date
October 24, 1998, 16:00 local (20:00 UTC)
Place
Saratoga Spring, NY
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N4446TBurkhart Grob G103-TWINA
Weather
Visual (VMC) · Day
Status
Completed · report February 16, 2001
Report
Approved by Office Director
FAA report
19981024044999A
Case key
45199

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 control of the glider while landing.

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
Aircraft control - not maintainedPilot in commandCause

Analysis

The purpose of the flight was to conduct a local area glider flight. The glider departed the airport, and released from the tow-plane at 3,000 feet MSL. The pilot looked for thermals, but found none. He remained within 2 miles of the airport then decided to abort the flight due to insufficient lift. The pilot made a left downwind entry at 800 feet above the ground, turned base, then final. While on final, the pilot had his hands full just to keep the glider lined-up with the runway because of turbulence. The glider touched down at the intended touchdown point, but bounced back into the air. After the first bounce, the pilot was focusing on maintaining runway alignment that the glider began to oscillate. After contacting the runway a total of four times, the pilot was able to regain control of the glider and complete the landing. An after landing inspection revealed substantial damage to the tail wheel, and tail section of the glider.

Factual narrative

On October 24, 1998, at 1600 eastern standard time, a Grob G103-Twina, N4446T, was substantially damage during landing at Saratoga County Airport (5B2), Saratoga Springs, New York. The certificated private pilot and passenger were not injured. Visual meteorological conditions prevailed and no flight plan had been filed for the personal flight conducted under 14 CFR Part 91.

The pilot stated that the purpose of the flight was to conduct a local area glider flight. He estimated the winds at the time of the accident were 270 degrees magnetic at 10 to 15 knots, and that the sky was clear.

The pilot departed 5B2 about 1535 from Runway 23, and released from the tow-plane at 3,000 feet MSL. The pilot stated he looked for thermals, but found none, and that he remained within 2 miles of the airport until about 1550, when he decided to abort the flight due to insufficient lift. After deciding to abort the flight, he positioned himself on a left downwind at 800 feet above the ground for Runway 23. From downwind, he turned base, and then final. According to the pilot, it was the last flight of the day, so he planned to land long. It was club policy for the pilots to land long on the last flight of the day, because the glider was tied down at the departure end of Runway 23.

The pilot stated that while on final, he had his hands full just to keep the glider lined-up with the runway, and that the ride was very "bouncy." According to the pilot, he carried approximately 10 knots of extra airspeed while on final because of the turbulence. He did not recall his exacted speed, but estimated it to be about 70 knots.

The pilot added that the glider touched down at the intended touchdown point, but bounced back into the air. He stated that after the first bounce, he was focusing on maintaining runway alignment that the glider started to oscillate from "Pilot Induced Oscillation." After contacting the runway a total of four times, the pilot was able to regain control of the glider and complete the landing. The pilot estimated that from initial runway contact until he regained control, was approximately 500 feet.

The pilot inspected the glider, and found the tail wheel crushed into the tail of the glider. He also observed several cracks in the tail that penetrated the gel-coat and underlying fiber glass.

Aircraft

Registration
N4446T
Reported as
Burkhart Grob G103-TWINA
Category
Glider
Serial number
3824
Airframe hours
2,245
Engine
unknown
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Saratoga Soaring Association
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 29, 1998 · 97 hours before
Departed
5B2
Airport
5B2 · Saratoga County, runway 23, 4,700 × 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
55
Certificate
Private
Medical
Unknown, Unknown
Seat
Front
Flight hours
128 total · 116 in this make and model · 67 as pilot in command · 5 in the last 90 days · 1 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 45 °F
Altimeter
30.00 inHg
Observed at
ALB, 21 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.