SEA98LA155

NTSB accident investigation · Burkhart Grob G102 · Douglas, WA · July 3, 1998

Accident · No injuriesLimited investigationFinal report
Date
July 3, 1998, 14:00 local (21:00 UTC)
Place
Douglas, WA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N707NLBurkhart Grob G102
Weather
Visual (VMC) · Day
Status
Completed · report January 11, 2000
Report
Approved by Office Director
FAA report
19980703035399A
Case key
43712

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 failure to maintain clearance from objects on the ground. Factors include misjudgment of weather conditions (unfavorable winds).

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 objectManeuvering
Weather condition - unfavorable windFactor
Clearance - not maintainedPilot in commandCause
Weather evaluation - misjudgedPilot in commandFactor

Analysis

The pilot stated that the accident occurred while he was making an off-airport landing. He attempted to land next to a road in a plowed field. The terrain was rolling wheat fields, alternately plowed and in use. He stated that he was circling a house, looking for lift, when he made the decision to land. He widened his circle and flew north, parallel to the road. There was no indication of high winds, and he didn't have to crab the aircraft to correct his track over the ground. He stated that he turned toward the road and as he passed the mid-point of his turn to the intended final approach, he realized that he was being carried into the power wires on the far side of the road. He was at wire height and in about a 45 degree bank. He didn't think he could get over the wires and didn't want to increase bank angle, so he flew under the wires at about a 30 degree angle to the road. The right wingtip struck the pole, spinning the glider. He said the glider came to a stop, with its tail pointed 180 degrees from the direction of travel in the edge of a wheat field. He noted that within 30 minutes a thunderstorm came through the area.

Factual narrative

On July 3, 1998, approximately 1400 Pacific daylight time, a Grob G102 glider, N707NL, registered to and operated by the Boeing Employees Soaring Club, Inc., and being flown by a commercial pilot, incurred substantial damage when one of the aircraft's wingtips struck a pole while landing, approximately 12 miles east of Douglas, Washington. The pilot was uninjured. Visual meteorological conditions prevailed and no flight plan had been filed. The flight, which was personal in nature, was to have been operated under 14CFR91, and originated as a round-robin glider flight from Ephrata, Washington.

The pilot stated that the accident occurred while he was making an off-airport landing. He attempted to land next to a road in a plowed field. The terrain was rolling wheat fields, alternately plowed and in use. He stated that he was circling a house, looking for lift when he made the decision to land. He widened his circle and flew north, parallel to the road. There was no indication of high winds, and he didn't have to crab the aircraft to correct his track over the ground. He stated that he turned toward the road and as he passed the mid-point of his turn to the intended final approach, he realized that he was being carried into the power wires on the far side of the road. He was at wire height and in about a 45 degree bank. He didn't think he could get over the wires and didn't want to increase bank angle, so he flew under the wires at about a 30 degree angle to the road. The right wingtip struck the pole, spinning the glider. He said the glider came to a stop, with its tail pointed 180 degrees from the direction of travel in the edge of a wheat field. He noted that within 30 minutes, a thunderstorm came through the area.

Aircraft

Registration
N707NL
Reported as
Burkhart Grob G102
Category
Glider
Serial number
1018
Airframe hours
1,307
Engine
unknown
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Boeing Employees Soaring Club
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 14, 1998 · 19 hours before
Departed
EPH · Ephrata, WA

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
46
Certificate
Commercial
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
826 total · 50 in this make and model · 764 as pilot in command · 46 in the last 90 days · 37 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 12 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 63 °F
Altimeter
29.00 inHg
Observed at
MWH, 31 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.