CEN10CA451

NTSB accident investigation · Piper PA-12 · Wild Rose, WI · August 2, 2010

Accident · No injuriesData collectionFinal report
Date
August 2, 2010, 06:30 local (11:30 UTC)
Place
Wild Rose, WI
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N775PAPiper PA-12
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report April 7, 2011
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration - Milwaukee FSDO
FAA report
20100802039579A
Case key
76813

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 loss of directional control during the takeoff roll.

Findings · 4

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 · Not attained/maintainedPiper PA-12: 31 casesAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotPiper PA-12: 51 casesAll aircraft: 9,295 casesProbable cause
Runway/land/takeoff/taxi surface: wet surfaceEnvironmental issues › Physical environment · Effect on operationPiper PA-12: 1 caseAll aircraft: 141 cases
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomePiper PA-12: 7 casesAll aircraft: 933 cases

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 stated that tailwheel-equipped airplane was accelerating on the takeoff roll when the tail became airborne before rotation speed, which was immediately followed by a left yaw/swerve. He attempted to regain directional control with right rudder and brake inputs, but the airplane continued in the left swerve. He elected to abort the takeoff by reducing engine power to idle while continuing to apply right rudder and brake inputs. He used aggressive braking as the airplane approached the left edge of the runway, but the airplane continued off the runway and struck several trees. He noted that the turf-runway was dew covered and that the wind was at approximately 3 knots, with no gusts. The leading edge of both wings, vertical stabilizer, and rudder were substantially damaged during the accident. A postaccident inspection of the airplane did not reveal any mechanical malfunction of the tailwheel or braking systems.

Factual narrative

The accident occurred while the tail-wheel equipped airplane was accelerating on the takeoff roll. The pilot reported that the airplane's tail became airborne before rotation speed, and was immediately followed by a left yaw/swerve. He attempted to regain directional control with right rudder and brake inputs, but the airplane continued in the left swerve. He elected to abort the takeoff by reducing engine power to idle while continuing to apply right rudder and brake inputs. The pilot stated that he used "aggressive" braking as the airplane approached the left edge of the runway, but the airplane departed the runway and struck several trees. He noted that the turf-runway was dew covered and that the winds were approximately 3 knots from the southwest, with no gusts. The leading edges of both wings, vertical stabilizer, and rudder were substantially damaged during the accident. A post-accident inspection of the airplane did not reveal any mechanical malfunction of the tailwheel or braking systems.

Aircraft

Registration
N775PA
Reported as
Piper PA-12
Category
Airplane
Serial number
12-2804
Airframe hours
2,020
Engine
Lycoming O-320-B2B, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Ferry · Part 91
Operator
UND Aerospace Foundation
Registered owner
UND Aerospace Foundation
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · July 23, 2010
Departed
W23 · Wild Rose, WI
Destination
KRPD · Rice Lake, WI
Flight plan
Company VFR
Airport
W23 · Wild Rose Idlewild Airport, runway 27, 2,990 × 100 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

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
50
Injuries
None
Certificates
Commercial, Airline transport
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane, Helicopter
Medical
Class 2, With waivers/limitations
Seat
Front
Flight hours
6,350 total · 7 in this make and model · 6,324 as pilot in command · 66 in the last 90 days · 32 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 3 knots
Visibility
6 statute miles
Lowest ceiling
None
Temperature
66 °F, dew point 66 °F
Altimeter
29.95 inHg
Observed at
KY50, 10 nm away

Docket · 2

The files NTSB released with the investigation on January 10, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 968 KB in all.

FAA reports on this event · 1

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