SEA98LA151

NTSB accident investigation · Curtiss-Wright 12W · Woodland, WA · July 26, 1998

Accident · No injuriesLimited investigationFinal report
Date
July 26, 1998, 14:30 local (21:30 UTC)
Place
Woodland, WA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N11715Curtiss-Wright 12W
Weather
Visual (VMC) · Day
Status
Completed · report January 11, 2000
Report
Approved by Office Director
FAA report
19980726017589A
Case key
43580

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 NTSB’s determination of the probable cause, and any contributing factors.

The pilot in command misjudged clearance from high vegetation when he landed. Factors include inadequate mowing of high vegetation by airport personnel, providing insufficient clearance for the wingspan of landing airplanes

Analysis

The pilot of the antique biplane stated that he preferred to land on grass when possible, so he elected to land on the 800 foot grass overrun area of the 1965 foot runway. From the air, the freshly mowed overrun looked acceptable, with the eight to nine foot high stand of scotch bloom showing as a dark green from the air and appearing to be grass. He slipped to a landing, touched down straight and was tracking near the middle of the mowed area when his right wing tip caught in the scotch bloom. The vegetation pulled the aircraft off the right side of the runway, and the lower left wing impacted the ground, causing substantial damage. According to FAA inspectors, the first signatures of impact were 62 feet from the near end of the runway. The airplane came to a stop 247 feet from the near end of the runway. The width of the mowed area of the runway was 49.5 feet, at the time the FAA inspector checked it. The pilot stated that the mowed overrun of 800 feet was mowed 25 feet wide up to the edge of the eight to nine feet high scrub brush at the time of the accident, and that his airplane had a 28 foot wing span.

Factual narrative

On July 26, 1998, approximately 1430 Pacific daylight time, a Curtis-Wright 12W biplane, N11715, was substantially damaged when its right lower wing impacted tall vegetation at the edge of the runway while landing at Woodland, Washington. The private pilot, the sole occupant, was uninjured. Visual meteorological conditions prevailed at the time of the flight, which originated at Vancouver, Washington, about twenty minutes before the accident. There was no report of an ELT actuation.

In his written statement, the pilot stated that "from the air, the freshly mowed overrun looked inviting. With the antique I prefer to land on grass over paving if I have the option. The local pilots were having a B-B-Q in the picnic area at the south end of the runway. I decided to land on the grass and pull off into the picnic area instead of having to back taxi on the pavement. The stand of scotch bloom showed as a dark green from the air and appeared to be grass. I slipped in, touched down straight and was tracking near the middle of the mowed area when my right wing tip caught in the scotch bloom, pulling me to the right and tipping me onto the left wing tips. The only damage was to both left wings and prop."

The pilot told FAA inspectors that he was landing to the north when the lower right wing encountered tall grass and vegetation (later measured as 8-9 foot tall scotch broom). The vegetation pulled the aircraft off the right side of the runway, and the lower left wing impacted the ground, causing substantial damage. According to FAA inspectors, the first signatures of impact were 62 feet from the near end of the runway. The airplane came to a stop 247 feet from the near end of the runway. The width of the mowed area of the runway was 49.5 feet, at the time the FAA inspector checked it. The pilot stated that the mowed overrun of 800 feet was mowed 25 feet wide up to the edge of the eight to nine feet high scrub brush at the time of the accident, and that his airplane had a 28 foot wing span.

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.

On ground/water collision with objectLanding
Terrain condition - high vegetationFactor
Clearance - misjudgedPilot in commandCause
Other airport/runway maintenance - inadequateAirport personnelFactor

Aircraft

Registration
N11715
Reported as
Curtiss-Wright 12W
Category
Airplane
Serial number
2040
Airframe hours
4,018
Engine
Kinner R-55, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Paul Lawrence
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 20, 1998 · 5 hours before
Departed
Vancouver, WA
Flight plan
VFR
Airport
WA71 · Woodland State, runway 31, 1,965 × 25 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
63
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Rear
Flight hours
6,714 total · 1,254 in this make and model · 25 in the last 90 days · 8 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Visibility
50 statute miles
Lowest ceiling
None
Temperature
97 °F

FAA reports on this event · 1

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