ERA15CA012

NTSB accident investigation · Schweizer SGS 2 33A · Waynesboro, VA · October 4, 2014

Accident · No injuriesData collectionFinal report
Date
October 4, 2014, 11:20 local (15:20 UTC)
Place
Waynesboro, VA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N3619TSchweizer SGS 2 33A
Defining event
Approach-VFR pattern final: Windshear or thunderstorm
Weather
Visual (VMC) · Day
Status
Completed · report April 7, 2015
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
FAA report
20141004019079A
Case key
90226

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 glider's inadvertent encounter with low altitude wind shear.

Findings · 3

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.

Wind: sudden wind shiftEnvironmental issues › Conditions/weather/phenomena · Effect on operationAll aircraft: 114 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Attain/maintain not possibleAll aircraft: 3,958 cases
Performance/control parameters: descent/approach/glide pathAircraft › Aircraft oper/perf/capability · Attain/maintain not possibleAll aircraft: 809 cases

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, there were some areas of turbulence during the glider's aero tow to 3,000 feet, but the tow was uneventful. The flight was then smooth until descent to about 1,200 feet above ground level, when conditions became "bumpy." Upon entering the traffic pattern for runway 24, the pilot increased normal approach airspeed by 10 knots in anticipation of gusty headwinds on final approach. The approach then proceeded "normally" until short final, when the glider encountered a "rogue" wind gust that "violently" rolled it about 90 degrees to the right, heading it away from runway centerline. By the time the pilot was able to level the wings, the glider was too low, necessitating an off-airport landing into small trees that resulted in left wing spar damage. Winds, recorded at a nearby airport about the time of the accident, were from 260 degrees true at 13, gusting to 19 knots. The pilot did not report any preexisting mechanical anomalies that would have precluded normal operation.

Factual narrative

According to the pilot, there were some areas of turbulence during the glider's aero tow to 3,000 feet, but the tow was uneventful. The flight was then smooth until descent to about 1,200 feet above ground level, when conditions became "bumpy." Upon entering the traffic pattern for runway 24, the pilot increased normal approach airspeed by 10 knots in anticipation of gusty headwinds on final approach. The approach then proceeded "normally" until short final, when the glider encountered a "rogue" wind gust that "violently" rolled it about 90 degrees to the right, heading it away from runway centerline. By the time the pilot was able to level the wings, the glider was too low, necessitating an off-airport landing into small trees that resulted in left wing spar damage. Winds, recorded at a nearby airport about the time of the accident, were from 260 degrees true at 13, gusting to 19 knots. The pilot did not report any preexisting mechanical anomalies that would have precluded normal operation.

Aircraft

Registration
N3619T
Reported as
Schweizer SGS 2 33A
Category
Glider
Serial number
568
Built
1981
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Shenandoah Valley Soaring Inc
Registered owner
Shenandoah Valley Soaring Inc
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 16, 2014
Departed
W13 · Waynesboro, VA
Destination
W13 · Waynesboro, VA
Airport
W13 · Eagle'S Nest, runway 24, 2,004 × 50 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
68
Injuries
None
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land
Last flight review
March 14, 2014
Seat
Rear
Restraint
4-point
Flight hours
595 total · 159 in this make and model · 417 as pilot in command · 28 in the last 90 days · 23 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 13 knots, gusting 19
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 37 °F
Altimeter
29.72 inHg
Observed at
SHD, 11 nm away

Docket · 2

The files NTSB released with the investigation on April 2, 2015, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.4 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.