- Date
- June 16, 2011, 15:00 local (19:00 UTC)
- Place
- Sterling, MA
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N99136Eiriavion PIK 20B
- Defining event
- Landing: Landing area overshoot
- Weather
- Visual (VMC) · Day
- Status
- Completed · report October 4, 2011
- Report
- Approved by Office Director
- NTSB office
- Eastern Region Aviation
- Parties
- FAA/FSDO
- FAA report
- 20110616012709A
- Case key
- 80814
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The pilot's misjudgment of the amount of flaps required to attain the proper touchdown point. Contributing to the accident was the pilot's limited experience in the high performance glider.
Findings · 4
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
Analysis
According to the pilot, this was his first flight in this flap only, high performance glider. The glider was towed to 5,000 feet, where the pilot practiced pattern work as well as extending and retracting the flaps, from zero degrees to 90 degrees, while maintaining an adequate airspeed for landing. The pilot entered a tight traffic pattern at the airport and extended the flaps to 30 degrees. On the final leg of the traffic pattern, the glider was in line with the runway, and the pilot intended to extend the flaps to 45 degrees, but was unsure if he did so. When the glider was halfway down the runway, the pilot knew he had excessive airspeed and was going to land further down the runway than intended. Near the end of the runway, the pilot thought he landed so he pushed the controls forward in order to gain ground control, but the glider continued over trees past the end of the runway. Since the glider did not have enough altitude to safely turn back to the runway, the pilot landed it in trees resulting in substantial damage to the fuselage. The pilot stated that he accumulated 107 hours of total flight time in a glider, of which, no hours were in the same make and model as the accident glider. The pilot reported there were no preexisting mechanical anomalies with the glider.
Factual narrative
According to the pilot, this was his first flight in this flap only, high performance glider. The glider was towed to 5,000 feet, where the pilot practiced pattern work as well as extending and retracting the flaps, from zero degrees to 90 degrees, while maintaining an adequate airspeed for landing. The pilot entered a tight traffic pattern at the airport and extended the flaps to 30 degrees. On the final leg of the traffic pattern, the glider was in line with the runway, and the pilot intended to extend the flaps to 45 degrees, but was unsure if he did so. When the glider was halfway down the runway, the pilot knew he had excessive airspeed and was going to land further down the runway than intended. Near the end of the runway, he pushed the controls forward in order to gain ground control, but the glider continued over trees past the end of the runway. Since the glider did not have enough altitude to safely turn back to the runway, the pilot landed in trees resulting in substantial damage to the fuselage. The pilot reported there were no preexisting mechanical anomalies with the glider and that he had never flown this make and model glider.
Aircraft
- Registration
- N99136
- Reported as
- Eiriavion PIK 20B
- Category
- Glider
- Serial number
- 20147C
- Airframe hours
- 2,200
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Timothy Greenwood
- Registered owner
- Timothy Greenwood
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · May 7, 2011
- Departed
- 3B3 · Sterling, MA
- Destination
- 3B3 · Sterling, MA
- Airport
- 3B3 · Sterling Airport, runway 34, 3,086 × 40 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
- 58
- Injuries
- None
- Certificate
- Private
- Last flight review
- June 29, 2009
- Seat
- Single
- Flight hours
- 107 total · 0 in this make and model · 63 as pilot in command · 2 in the last 90 days · 2 in the last 30 days · 0 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 240° at 6 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 88 °F, dew point 52 °F
- Altimeter
- 29.86 inHg
- Observed at
- FIT, 8 nm away
Docket · 3
The files NTSB released with the investigation on July 8, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 745 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.