CEN11LA601

NTSB accident investigation · Van's RV-12 · Windom, MN · August 29, 2011

Accident · Minor injuriesLimited investigationFinal report
Date
August 29, 2011, 09:30 local (14:30 UTC)
Place
Windom, MN
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N73712Van's RV-12
Defining event
Takeoff: Sys/Comp malf/fail (non-power)
Weather
Visual (VMC) · Day
Status
Completed · report March 20, 2012
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration, Minneapolis FSDO
FAA report
20110829019779A
Case key
81624

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 airplane control after liftoff due to his distraction with the unsecured canopy, which he did not lock before takeoff.

Findings · 5

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotVans RV-12: 10 casesAll aircraft: 9,295 casesProbable cause
Attention/monitoring: attentionPersonnel issues › Psychological · PilotVans RV-12: 1 caseAll aircraft: 226 casesProbable cause
Action: forgotten action/omissionPersonnel issues › Action/decision · PilotVans RV-12: 1 caseAll aircraft: 440 casesProbable cause
Doors: passenger/crew doorsAircraft › Aircraft structures · Not specifiedVans RV-12: 2 casesAll aircraft: 86 casesProbable cause
Performance/control parametersAircraft › Aircraft oper/perf/capability · Not attained/maintainedVans RV-12: 2 casesAll aircraft: 1,269 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 inadvertently did not secure the canopy latch after entering the cabin. After liftoff, he noticed air entering the cockpit from the unsecured canopy. He stated that he was distracted with securing the canopy as the airplane descended toward the runway. The airplane collided with the runway as he attempted to reestablish a level flight attitude. The airplane subsequently slid off the right side of the runway into a soybean field. The pilot reported that there were no preimpact mechanical malfunctions or failures that would have precluded the normal operation of the airplane. Additionally, he stated that the accident could have been prevented had he focused on flying the airplane instead of attempting to secure the unlatched canopy.

Factual narrative

On August 29, 2011, at 0930 central daylight time, a Van's Aircraft RV-12 experimental light-sport airplane, N73712, was substantially damaged when it collided with the runway shortly after takeoff from Windom Municipal Airport (KMWM), Windom, Minnesota. The pilot sustained minor injuries. The airplane was registered to and operated by the private pilot under the provisions of 14 Code of Federal Regulations Part 91. Day visual meteorological conditions prevailed for the flight, which was operated without a flight plan. The local flight was originating at the time of the accident. The pilot reported that he inadvertently did not secure the canopy latch after entering the cabin. After liftoff he noticed air entering the cockpit from the unsecured canopy. He stated that he was distracted with securing the canopy as the airplane inadvertently descended toward the runway. The airplane collided with the runway as he attempted to reestablish a level flight attitude. The airplane subsequently slid off the right side of the runway into a soybean field. The fuselage, wings, firewall, and empennage sustained substantial damage during the ground collision. The pilot reported that there were no preimpact mechanical malfunctions or failures that would have precluded the normal operation of the airplane. Additionally, he stated that the accident could have been prevented had he focused on flying the airplane instead of attempting to secure the unlatched canopy.

Aircraft

Registration
N73712
Reported as
Van's RV-12
Category
Airplane
Serial number
120034
Airframe hours
101
Engine
Rotax 912 ULS, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental light sport (Special)
Last inspection
Condition · October 21, 2010
Departed
KMWM · Windom, MN
Destination
KMWM · Windom, MN
Airport
KMWM · Windom Municipal Airport, runway 17, 3,599 × 75 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
76
Injuries
Minor
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Sport pilot
Last flight review
October 20, 2009
Seat
Left
Flight hours
3,986 total · 154 in this make and model · 3,903 as pilot in command · 41 in the last 90 days · 15 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
66 °F, dew point 63 °F
Altimeter
30.05 inHg
Observed at
KMWM

Docket · 4

The files NTSB released with the investigation on February 8, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 613 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.