CEN09CA421

NTSB accident investigation · Pitts S-2A · Springfield, IL · July 8, 2009

Accident · No injuriesData collectionFinal report
Date
July 7, 2009, 19:47 local (Jul 8, 2009, 00:47 UTC)
Place
Springfield, IL
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N18BTPitts S-2A
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report September 30, 2009
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA-Springfield FSDO
Case key
74228

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 inability to maintain directional control while landing due to the unintentional obstruction of the rudder by the passenger.

Findings · 3

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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Attain/maintain not possiblePitts S-2A: 1 caseAll aircraft: 3,958 casesProbable cause
Personnel issuesPersonnel issues › Miscellaneous · PassengerPitts S-2A: 1 caseAll aircraft: 29 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

The pilot reported that he was landing the tail wheel equipped airplane when the accident happened. He stated that the airplane touched down on one main wheel first and the airplane shifted and rapidly turned right. He stated that the airplane's movement resulted in his passenger's body shifting to the left against the left rudder/brake pedal. The rear seat rudder pedals are located near the front seat occupant's hips. The pilot stated that he attempted to correct with left rudder, but was unable due to the obstruction of the rudder pedal by the front seat passenger's body. The airplane subsequently ground looped. The damage to the airplane included collapse of the main landing gear, damage to the left lower wing, and damage to the upper wing.

Factual narrative

The pilot reported that he was landing the tail wheel airplane when the accident happened. He stated that the airplane touched down on one main wheel first and the airplane shifted and rapidly turned right. He stated that the airplane's movement resulted in his passenger's body shifting to the left against the left rudder/brake pedal. The rear seat rudder pedals are located near the front seat occupant's hips. The pilot stated that he attempted to correct with left rudder, but was unable due to the obstruction of the rudder pedal by the front seat passenger's body. The airplane subsequently ground looped. The damage to the airplane included collapse of the main landing gear, damage to the left lower wing, and damage to the upper wing.

Aircraft

Registration
N18BT
Reported as
Pitts S-2A
Category
Airplane
Serial number
2221
Airframe hours
2,590
Engine
Lycoming AEIO-360 SER, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Aerobatic; Standard, Normal
Last inspection
Annual · July 1, 2009
Departed
SPI · Springfield, IL
Destination
SPI · Springfield, IL
Airport
SPI · Abraham Lincoln Capital Airpor, runway 31, 7,400 × 150 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
43
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
June 1, 2009
Seat
Rear
Flight hours
3,500 total · 450 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
0° at 0 knots
Visibility
10 statute miles
Lowest ceiling
10,000 ft broken
Temperature
79 °F, dew point 70 °F
Altimeter
29.85 inHg
Observed at
SPI

Docket · 1

The files NTSB released with the investigation on August 5, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 678 KB in all.