ERA11CA350

NTSB accident investigation · Eiriavion PIK 20B · Sterling, MA · June 16, 2011

Accident · No injuriesData collectionFinal report
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.

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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.

Action: incorrect action performancePersonnel issues › Action/decision · PilotEiriavion PIK 20B: 1 caseAll aircraft: 1,386 casesProbable cause
Flight control system: tE flap control systemAircraft › Aircraft systems · Incorrect use/operationEiriavion PIK 20B: 1 caseAll aircraft: 74 casesProbable cause
Performance/control parameters: landing flareAircraft › Aircraft oper/perf/capability · Not attained/maintainedEiriavion PIK 20B: 1 caseAll aircraft: 1,285 casesProbable cause

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.