Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Oak Grove, Minnesota 55011
Thursday, June 28, 2007 18:45 CDT
NTSB Narrative Summary Released at Completion of Accident
The airplane impacted trees and terrain during a forced landing following a loss of engine power during a student solo instructional flight. The student pilot stated that he had flown for approximately 30 minutes when he lost his position. He began a descent in order to read the name of a town on a water tower when the engine began "vibrating." He then applied carburetor heat and richened the mixture, and the engine "got normal" for a few seconds. He saw that his altitude was now 2,200 feet so he turned the carburetor heat off and the engine began vibrating again accompanied by a loss in engine speed. He reapplied carburetor heat, but there was no significant change. The airplane was now at 1,800-1,900 feet and the airplane was vibrating and "slowly" losing engine speed. He then performed a landing on a field instead of a road and impacted trees. He stated that he had "very little" power to clear the trees. Examination of the engine revealed evidence of exhaust gas emanating from a hole that was located above the last fin on the upper portion of the cylinder barrel and penetrated into the 11 o'clock valve cover screw. The serviceable tag associated with the cylinder assembly was dated March 19, 2004, identified the manufacturer as Superior.
NTSB Probable Cause Narrative
A loss of engine power for undetermined reasons. Contributing to the accident was the unsuitable terrain.
Event Information
| Type of Event | Accident |
| Event Date | 6/28/2007 |
| Event Day of the Week | Thursday |
| Time of Event | 1845 |
| Event Time Zone | Central Daylight Time |
| Event City | Oak Grove |
| Event State | MINNESOTA |
| Event Country | -- |
| Zipcode of the event site | 55011 |
| Event Date Year | 2007 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | -- |
| Event Location Longitude | -- |
| 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 | Weather Observation Facility |
| Time of the weather observation | 1850 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 170 |
| Weather Observation Facility ID | ANE |
| Elevation of weather observation facility | 912 |
| Distance of event from weather observation facility (units?) | 15 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 5000 |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 20 |
| Dew Point at event time (in degress fahrenheit) | 9 |
| Wind Direction (degrees magnetic) | 20 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 5 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.2 |
| 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) | 23447 |
| NTSB Notification Source | FAA |
| NTSB Notification Date | Jun 28 2007 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Apr 30 2008 1:28PM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Minneapolis FSDO |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N6267E |
| NTSB Number | CHI07LA185 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Cessna |
| Aircraft Model | 172 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 46367 |
| Certified Max Gross Weight | 2200 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 4 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Jun 1 2007 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 8706 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Dennis L Williams |
| Aircraft Owner Street Address | 1605 60th Ave SW |
| Aircraft Owner City | Pine River |
| Aircraft Owner State | MN |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 56474 |
| Operator is an individual? | No |
| Operator Name | Air D Inc. |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | PO Box 187 |
| Operator City | Backus |
| Operator State | MN |
| Operator Country | USA |
| Operator Zip code | 56435 |
| Operator Code | AA6S |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | -- |
| 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) | Instructional |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | STC |
| Departure City | St. Cloud |
| Departure State | MN |
| Departure Country | USA |
| Departure Time | 1830 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | 7Y3 |
| Destination City | Backus |
| Destination State | MN |
| Destination Country | USA |
| Specific Phase of Flight | Cruise |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Apr 12 2008 1:04AM |
| User who most recently changed record | BOWL |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |