CHI05CA196

NTSB accident investigation · Simmons GP-4 · Oshkosh, WI · July 24, 2005

Accident · No injuriesData collectionFinal report
Date
July 24, 2005, 12:00 local (17:00 UTC)
Place
Oshkosh, WI
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N619BSSimmons GP-4
Weather
Visual (VMC) · Day
Status
Completed · report October 27, 2005
Report
Approved by Office Director
Parties
Milwaukee, WI FSDO
FAA report
20050724024529A
Case key
62055

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's failure to maintain airspeed sufficient enough to compensate for the gusty crosswind condition and prevent a stall during the landing flare. A factor associated with the accident was the gusting crosswind condition.

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 - in flightLanding - flare/touchdown
Weather condition - gustsFactor
Weather condition - crosswindFactor
Compensation for wind conditions - inadequatePilot in commandCause
Airspeed - not maintainedPilot in commandCause
Stall/mush - inadvertentPilot in command
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - runway

Analysis

The airplane collided with the runway following a loss of control while landing. The accident occurred as the pilot was arriving at EAA AirVenture 2005. The pilot reported he made a low turn onto final approach, possibly encountered a wind gust, and the airplane stalled. The pilot reported the winds as being from 270 degrees at 11 knots, gusting to 20 knots. The winds reported at the airport 7 minutes prior to the accident were from 250 degrees at 11 knots, gusting to 15 knots.

Factual narrative

On July 24, 2005, at 1200 central daylight time, an amateur built Simmons GP-4, N619BS, collided with the runway following a loss of control while landing on runway 18 (8,002 feet by 150 feet, asphalt), at Wittman Field (OSH), Oshkosh, Wisconsin. The pilot and passenger were not injured. The airplane was substantially damaged. The 14 Code of Federal Regulations Part 91 personal flight was operating in visual meteorological conditions without a flight plan. The last leg of the cross country flight originated from Dayton, Ohio, at 1100 eastern daylight time.

The accident occurred as the pilot was arriving at EAA AirVenture 2005. The pilot reported he made a low turn onto final approach, possibly encountered a wind gust, and the airplane stalled. The pilot reported the winds as being from 270 degrees at 11 knots, gusting to 20 knots.

The winds reported at OSH at 1153 were from 250 degrees at 11 knots, gusting to 15 knots.

Aircraft

Registration
N619BS
Reported as
Simmons GP-4
Category
Airplane, amateur-built
Serial number
003
Airframe hours
180
Engine
Lycoming IO-360-A1A6, 200 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
James K. Simmons
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · November 1, 2004
Departed
I19 · Dayton, OH
Destination
OSH · Oshkosh, WI

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
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3
Seat
Left
Flight hours
2,000 total · 180 in this make and model · 1,950 as pilot in command · 18 in the last 90 days · 11 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 11 knots, gusting 15
Visibility
10 statute miles
Lowest ceiling
None
Temperature
91 °F, dew point 73 °F
Altimeter
29.79 inHg
Observed at
OSH

FAA reports on this event · 1

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