ERA15LA375

NTSB accident investigation · Schempp-Hirth Ventus 2CT · Blacksburg, VA · September 24, 2015

Accident · Serious injuriesLimited investigationFinal report
Date
September 24, 2015, 14:52 local (18:52 UTC)
Place
Blacksburg, VA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N710JCSchempp-Hirth Ventus 2CT
Defining event
Maneuvering: Loss of lift
Weather
Visual (VMC) · Day
Status
Completed · report January 21, 2016
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20150924015629A
Case key
92056

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

A loss of thermal lift during a motor glider flight, which resulted in an off-airport landing. Contributing to the accident was the pilot’s failure to maintain adequate clearance from power lines during the off-airport landing attempt.

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.

Temp/humidity/pressure: thermal liftingEnvironmental issues › Conditions/weather/phenomena · Effect on operationSchempp-Hirth VENTUS 2CT: 2 casesAll aircraft: 53 casesProbable cause
Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedSchempp-Hirth VENTUS 2CT: 2 casesAll aircraft: 1,310 casesProbable cause
Object/animal/substance: wireEnvironmental issues › Physical environment · Awareness of conditionSchempp-Hirth VENTUS 2CT: 1 caseAll aircraft: 588 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

The pilot was flying the motor glider in an annual soaring competition. The pilot reported that the motor glider was towed to 2,500 ft and then released. He subsequently performed a routine test of the engine and observed no anomalies; he then shut down the engine and stowed it before beginning the first leg of the competition. About 20 miles from the departure airport, the motor glider began losing altitude due to a loss of thermal lift, and the pilot then prepared for an off-airport landing. He deployed the retractable engine and attempted to start it but was unsuccessful. The pilot set up for landing to a field. He did not see power lines bordering the approach end of the field, and the motor glider impacted the power lines and then descended to the ground in a nose-down attitude.

Factual narrative

On September 24, 2015, about 1452 eastern daylight time, a Schempp-Hirth Ventus 2CT motorglider, N710JC, was substantially damaged when it impacted a wire and trees during an off-airport landing in Blacksburg, Virginia. The commercial pilot was seriously injured. Visual meteorological conditions prevailed, and no flight plan was filed for the local flight, which originated from Virginia Tech/Montgomery Executive Airport (BCB), Blacksburg, Virginia. The personal flight was conducted under the provisions of Title 14 Code of Federal Regulations Part 91.According to the pilot, he was flying in an annual soaring competition. He departed from BCB about 1215 with a tow up to an altitude of 2,500 feet, then released from the tow plane. He subsequently performed a routine test run of the 20-horsepower engine and observed no anomalies. He then shut down and stowed the engine before beginning the first leg of the competition. About 20 miles from BCB, he had difficulty finding thermals for lift. The glider began losing altitude and he prepared for an off airport landing. He deployed the glider's retractable engine; however, as he attempted to start the engine, it "sputtered" and would not run. In a post accident statement, he postulated that he held the decompression valve open long enough for the engine to build rpm, but was not sure due to the circumstances of being low and preparing for an off airport landing. He set up for landing in a field, but did not see the power lines bordering the approach end of the field, and contacted the wires before impacting the ground. According to a witness, they heard the motorglider fly over and "the engine was loud and seemed to be struggling or missing. It did not sound normal." The pilot reported 2,500 hours of total flight experience and 255 of those hours were in the same make and model as the accident motorglider. He held a commercial pilot certificate for airplane single-engine land and instrument airplane. The pilot's last flight review was on May 2, 2015. He did not have a medical certificate, nor was he required to when operating a glider. Examination of the wreckage at the accident site by a Federal Aviation Administration inspector revealed that the motorglider struck a wire and trees and impacted the ground in a nose down attitude. The forward fuselage was crushed, and the right wing was fractured and separated about one-third span from the wing tip. The fuel shut off valve and the fuel pump switch were in the off position. The 1455 recorded weather observation at BCB, located about 7 nautical miles southwest of the accident site, included wind from 100 degrees at 8 knots, visibility 10 statute miles clear skies, temperature 23 degrees C, dew point 12 degrees C; barometric altimeter setting of 30.28 inches of mercury.

Aircraft

Registration
N710JC
Reported as
Schempp-Hirth Ventus 2CT (NO SERIES)
Category
Glider
Serial number
231
Built
2012
Airframe hours
283
Engine
Solo 2350, 20 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · March 1, 2015
Departed
BCB · Blacksburg, VA
Destination
BCB · Blacksburg, VA
Equipment
Data recorder, Satellite tracking device

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
70
Injuries
Serious
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
May 2, 2015
Seat
Single
Restraint
4-point
Flight hours
2,500 total · 255 in this make and model · 2,350 as pilot in command · 23 in the last 90 days · 13 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
100° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 54 °F
Altimeter
30.28 inHg
Observed at
KBCB, 7 nm away

Docket · 4

The files NTSB released with the investigation on December 1, 2015, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.2 MB 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.