SEA05LA054

NTSB accident investigation · Simpkins RV-6A · Yamhill, OR · March 6, 2005

Accident · FatalLimited investigationFinal report
Date
March 5, 2005, 17:00 local (Mar 6, 2005, 01:00 UTC)
Place
Yamhill, OR
Injuries
1 fatal, 1 serious
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N664DSSimpkins RV-6A
Weather
Visual (VMC) · Day
Status
Completed · report September 13, 2005
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20050305003069A
Case key
61096

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 failure of the pilot to maintain directional control of the airplane during the landing roll resulting in a nose over. Factors contributing to the accident included the wet runway and the embankment.

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.

Loss of control - on ground/waterLanding - roll
Terrain condition - wetFactor
Directional control - not maintainedPilot in commandCause
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - drop-off/descending embankmentFactor
Nose overLanding - roll

Analysis

After touching down on the main landing gear the airplane began to veer to the left on the wet runway. In an attempt to correct back to the right the pilot applied right rudder; however, this was not effective. The aircraft departed the left side of the runway, went over an embankment, nosed over, and came to rest in an inverted position. An examination of the airplane systems revealed no anomalies. Winds were reported to be variable at 2 miles per hours.

Factual narrative

On March 5, 2005, approximately 1700 Pacific standard time, a Simpkins RV-6A single-engine airplane, N664DS, sustained substantial damage following a loss of control and nose over during the landing roll at the Flying M Airport (OR05), Yamhill, Oregon. The airplane was registered to and operated by a private individual. The certificated private pilot received serious injuries and his sole passenger sustained fatal injuries. Visual meteorological conditions prevailed for the personal flight, which was operated in accordance with 14 CFR Part 91, and a flight plan was not filed. The flight to OR05 departed the Country Squire Airport, Sandy, Oregon, at 1630.

In a telephone interview with the NTSB investigator-in-charge (IIC), and according to the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2), the pilot reported that after arriving at OR05 he overflew the airstrip to check the windsock; winds were variable at 2 miles per hour. The pilot stated that he elected to land on Runway 25, which he characterized as "a soft field one-way runway located at the foot of the coastal mountains surrounded by trees and hills." The pilot stated that he entered the pattern on an extended left downwind, and that on final approach, "Everything looked normal. Wind and weather conditions were good." The pilot reported that after touching down on the main [landing gear], "...I felt the plane drift to the left. I applied pressure to the right rudder to keep the airplane on the center of the runway, but the rudder wasn't effective at all." The pilot stated that the airplane then went down an embankment and flipped over, coming to rest inverted with the nose of the airplane pointing back toward the east. When asked by the IIC if he attempted to add some right brake to correct, the pilot replied, "...no. Everything happened so fast [I] just didn't have time after trying to correct with right rudder." The pilot reported that the landing surface was soft, and its condition was rough and wet.

The pilot related to the IIC that during the summer of 2004 he noticed the left brake dragging while taxiing for takeoff, which the aircraft owner subsequently repaired. The pilot stated that he had flown the airplane several times prior to the accident, including the previous week, and didn't notice any problems with the brakes. The pilot reported no anomalies with the airframe or engine which would have prevented normal operations. A postaccident examination of the brakes and brake system by a certificated airframe and powerplant mechanic revealed no anomalies which would have prevented normal operation.

An FAA inspector who traveled to the accident site reported damage to the aircraft included the propeller spinner being crushed and broken, one propeller blade was bent rearward approximately 45 degrees, and the top of the rudder and vertical stabilizer were damaged. Additionally, the cockpit canopy overhead roll bar had collapsed, the left wing tip was damaged, and the nose landing gear was damaged. The inspector also reported that after the airplane was turned upright and while being moved from the accident location, both wheels turned freely and neither brake exhibited any signs of dragging.

The airplane was released to the owner's representative on March 16, 2005.

Aircraft

Registration
N664DS
Reported as
Simpkins RV-6A
Category
Airplane, amateur-built
Serial number
20664
Airframe hours
150
Engine
Lycoming O-320, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Mohammad S. Brimo
Registered owner
David G. Simpkins
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · September 27, 2004 · 15 hours before
Departed
S48 · Sandy, OR
Destination
OR05 · Yamhill, OR
Airport
OR05 · Flying M Airport, runway 25, 2,100 × 30 ft, grass/turf

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
37
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Last flight review
February 3, 2005
Seat
Left
Flight hours
138 total · 37 in this make and model · 138 as pilot in command · 5 in the last 90 days · 4 in the last 30 days
Role
Co-pilot
Age
79
Injuries
Fatal
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Last flight review
August 29, 2003
Seat
Rear
Flight hours
323 total · 129 in this make and model · 323 as pilot in command · 13 in the last 90 days · 8 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 2 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
55 °F
Altimeter
30.29 inHg

FAA reports on this event · 1

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