NYC08LA247

NTSB accident investigation · Boeing B75N1 · Culpeper, VA · July 12, 2008

Accident · Minor injuriesLimited investigationFinal report
Date
July 12, 2008, 13:25 local (17:25 UTC)
Place
Culpeper, VA
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N1066MBoeing B75N1
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report April 28, 2009
Report
Approved by Office Director
Parties
FAA/FSDO
FAA report
20080712846059A
Case key
68434

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 directional control of the airplane while landing in a quartering tailwind.

Findings · 2

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: tailwindEnvironmental issues › Conditions/weather/phenomena · Not specifiedBoeing B75N1: 2 casesAll aircraft: 594 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedBoeing B75N1: 12 casesAll aircraft: 3,958 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

As the pilot was landing the tailwheel-equipped biplane on runway 4 (a 5,000-foot-long, 100-foot-wide asphalt runway), the airplane touched down on the main landing gear and started to veer to the left. The pilot attempted to return the airplane to the center of the runway by applying rudder control; however, the airplane subsequently veered right, exited the right side of the runway, entered a ditch, and nosed over. The pilot stated that he did not experience any mechanical malfunctions with the airplane, and none were revealed during a postaccident examination by a Federal Aviation Administration inspector.

Another inspector observed a windsock near the runway that indicated winds between 160 and 180 degrees and of no more than 5 knots within a half an hour of the accident. This wind may have caused the airplane to swerve into the wind (to the right), compounding the effect of the rudder applied by the pilot to correct the initial veer to the left. Tailwheel-type airplanes, such as the accident airplane, have a greater tendency to be affected by wind than nosewheel-type airplanes because the surface area behind the landing gear of a tailwheel-type airplane is greater.

Factual narrative

On July 12, 2008, about 1325 eastern daylight time, a Boeing B75N1 (Stearman), N1066M, was substantially damaged while landing at the Culpeper Regional Airport (CJR), Culpeper, Virginia. The certificated private pilot sustained minor injuries and the passenger was not injured. Visual meteorological conditions prevailed, and no flight plan had been filed for the local flight. The personal flight was conducted under 14 Code of Federal Regulations Part 91.

The airplane was a tailwheel equipped biplane that was manufactured in 1942. According to a bill of sale, it was purchased by the pilot in November 1998.

The pilot reported that he was landing the airplane on runway 4 at CJR, a 5,000-foot-long by 100-foot-wide, asphalt runway. The airplane touched down on the main landing gear, and started to veer to the left. The pilot attempted to return the airplane to the center of the runway by applying the rudder control; however, the airplane subsequently veered right, exited the right side of the runway, entered a ditch, and nosed over.

The pilot stated he did not experience any mechanical malfunctions with the airplane; nor were any revealed during a postaccident examination conducted by a Federal Aviation Administration (FAA) inspector.

Damage to the airplane included, but was not limited to, the upper and lower left wings, the empennage, landing gear, and propeller.

At the time of the accident, the airplane had accumulated about 3,185 total hours. The most recent annual inspection was performed on October 1, 2007, and between the inspection and accident, the airplane accrued about 13 hours of operation. The airplane was equipped with a Continental W670 series radial engine, which had accumulated about 41 hours since its most recent overhaul.

The pilot reported 1,317 hours of total flight experience, which included 377 hours in the same make and model as the accident airplane. He further reported accumulating 14 and 4 hours in the same make and model as the accident airplane during the 90 and 30 days that preceded the accident; respectively.

According to FAA records, the pilot’s most recent application for an FAA third class medical certificate was issued on March 13, 2007.

An FAA inspector, who arrived at the airport about 3 to 5 minutes after the accident, reported that the windsock, which was located in the vicinity of runway 4, was indicating a "very light" southerly wind, that he estimated was from approximately 160 to 180 degrees at "no more than 5 knots."

Winds reported by the automated weather observation system (AWOS) at CJR, at 1320, were from 320 degrees at 4 knots. At 1340, the reported winds were from 190 degrees at 4 knots.

The pilot stated that he listened to the AWOS broadcast via radio while in the traffic pattern, which indicated calm winds; he further stated that the accident may have been prevented by:

"Less trust of the AWOS and closer attention to the wind sock! More power on landing to overcome the quartering tailwind, and maybe less corrective rudder application to overcome the left drift."

Aircraft

Registration
N1066M
Reported as
Boeing B75N1
Category
Airplane
Serial number
75-7932
Airframe hours
3,185
Engine
Cont Motor W670 SERIES, 220 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 1, 2007 · 13 hours before
Departed
CJR · Culpeper, VA
Destination
CJR · Culpeper, VA
Airport
CJR · Culpeper, runway 04, 5,000 × 100 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
72
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
February 4, 2008
Seat
Rear
Flight hours
1,317 total · 377 in this make and model · 1,151 as pilot in command · 16 in the last 90 days · 4 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
320° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
88 °F, dew point 72 °F
Altimeter
30.11 inHg
Observed at
CJR

FAA reports on this event · 1

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

Other investigations on N1066M · 2

Matched to the same aircraft by N-number and date.