Aircraft Accident/Incident Report

Gonvick, Minnesota 56644
Thursday, August 27, 2009 19:30 CDT

NTSB Narrative Summary Released at Completion of Accident

According to the pilot, he intended to fly the float-equipped airplane for approximately one hour to practice for his airplane sea rating. During the flight, the engine lost 100 revolutions per minute (RPMs) on four or five different occasions. At 1,000 feet above ground level, the engine sputtered and lost power. The pilot executed a forced landing to a field. During the landing, the airplane impacted terrain and nosed over. Examination of the airplane revealed the fuselage was buckled. A postaccident inspection and test run of the engine failed to reveal any mechanical anomalies. The nearest weather reporting facility, located 10 nautical miles southwest of the accident site, recorded a temperature of 22 degrees Celsius (C) and a dew point of 18 degrees C at the time of the accident. Review of the carburetor ice probability chart revealed that the temperature and dew point were conducive to serious icing conditions at glide power. The airplane was equipped with carburetor heat, but the pilot stated that he did not use it. The pilot reported a total of 1,859 flight hours and 12 flight hours in the accident airplane.

NTSB Probable Cause Narrative

A loss of engine power due to carburetor icing as a result of the pilot's failure to use carburetor heat.

Event Information

Type of Event Accident
Event Date 8/27/2009
Event Day of the Week Thursday
Time of Event 1930
Event Time Zone Central Daylight Time
Event City Gonvick
Event State MINNESOTA
Event Country --
Zipcode of the event site 56644
Event Date Year 2009
Event Date Month 8
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 475100N
Event Location Longitude 0953137W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness --
Investigator's weather source Pilot
Time of the weather observation
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID --
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation --
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 18
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) --
Variable Wind Indicator Variable
Wind Speed (knots) --
Wind Velocity Indicator Light and Variable
Wind Gust Indicator --
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 26117
NTSB Notification Source FAA Operations Center
NTSB Notification Date --
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Dec 8 2009 10:23AM
User who most recently changed record johb
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N2409M
NTSB Number CEN09CA560
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name PIPER
Aircraft Model PA-12
Aircraft Series Identifier --
Aircraft Serial Number 12-1526
Certified Max Gross Weight 1838
Aircraft Category Airplane
Aircraft Registration Class --
Aircraft is a homebuilt? No
Flight Crew Seats 2
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Jul 1 2009 12:00AM
Airframe hours since last inspection --
Airframe Hours 3508
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type Unknown
Aircraft Owner Name Michael Johnson
Aircraft Owner Street Address --
Aircraft Owner City Gonvick
Aircraft Owner State MN
Aircraft Owner Country USA
Aircraft Owner Zipcode 56644
Operator is an individual? No
Operator Name Michael Johnson
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City Gonvick
Operator State MN
Operator Country USA
Operator Zip code 56644
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation --
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board No
Departure Point Same as Event Yes
Departure Airport Code --
Departure City Gonvick
Departure State MN
Departure Country USA
Departure Time 1850
Departure Time Zone CDT
Destination Same as Local Flt crash at destination city
Destination Airport Code --
Destination City Gonvick
Destination State MN
Destination Country USA
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Dec 8 2009 10:23AM
User who most recently changed record johb
Since inspection or accident Last Inspection
Event Location Runway Number and Location N/A
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --