IAD02LA042

NTSB accident investigation · WSK PZL PW-5 · New Smithville, PA · April 11, 2002

Accident · No injuriesLimited investigationFinal report
Date
April 11, 2002, 16:00 local (20:00 UTC)
Place
New Smithville, PA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N908BTWSK PZL PW-5
Weather
Visual (VMC) · Day
Status
Completed · report May 13, 2003
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20020411007159A
Case key
54504

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 inadequate evaluation of the weather which resulted in the loss of thermal lift and collision with trees.

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.

In flight collision with objectEmergency landing
Weather condition - no thermal liftFactor
Weather evaluation - inadequatePilot in commandCause
Object - tree(s)

Analysis

During an "out-and-back" cross-country flight in a glider, the pilot noticed that the thermal lift began to dissipate, and he decided to "land out" in a field 1,500 feet below. He made a traffic pattern entry, and performed a forced landing. While on the base leg, the glider struck the top of a row of 20-foot-tall "hedge trees" at the edge of the field, and came to rest suspended in one of the trees. Examination of the glider revealed no mechanical anomalies.

Factual narrative

On April 11, 2002, at 1500 eastern daylight time, a WSK PZL PW-5 glider, N908BT, was substantially damaged during a forced landing near New Smithville, Pennsylvania. The certificated private pilot was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the local flight, which originated at Blairstown Airport (1N7), Blairstown, New Jersey. The personal flight was conducted under 14 CFR Part 91.

In a telephone interview, the pilot stated that he departed Blairstown about 1300. He intended to fly an "out-and-back" cross-country flight to Kutztown, Pennsylvania; however, during the return trip, lift began to dissipate, and he decided to "land out" in a field below him. He performed a traffic pattern entry to the field, and prepared for a forced landing to the east. While on the base leg, the glider struck the top of a row of 20-foot-tall 'hedge trees' at the edge of the field. The glider came to rest suspended in one of the trees.

In a written statement, the pilot noted that the glider was at 1,500 feet above ground level when, "an outlanding field was chosen."

The pilot stated that he obtained weather information from the Internet prior to his flight, which reported winds from 130 degrees, at 14 knots.

The pilot reported 912 hours of total flight experience, 577 of which were in gliders.

A Federal Aviation Administration (FAA) inspector performed an on-scene examination of the glider. According to the inspector, the tail of the glider was separated and substantial damage was observed to both wings. A flight control continuity check revealed no mechanical anomalies.

The winds reported at the Lehigh Valley International Airport (ABE), Allentown, Pennsylvania, about 10 miles to the northeast, at 1451, were from 120 degrees at 9 knots.

Aircraft

Registration
N908BT
Reported as
WSK PZL PW-5
Category
Glider
Serial number
1707003
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
William Thar
Airworthiness certificate
Special, Experimental (Special)
Departed
1N7 · Blairstown, NJ
Destination
1N7 · Blairstown, NJ

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
Airplane ratings
Single-engine land
Medical
Expired
Last flight review
December 2, 2000
Seat
Left
Flight hours
912 total · 98 in this make and model · 827 as pilot in command · 15 in the last 90 days · 8 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
120° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 37 °F
Altimeter
30.55 inHg
Observed at
ABE, 12 nm away

Docket · 1

The files NTSB released with the investigation on April 1, 2003, on NTSB’s docket system: statements, records, photos and specialists’ reports. 58 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.