Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Edwall, Washington 99008
Monday, August 18, 1997 13:00 PDT
NTSB Narrative Summary Released at Completion of Accident
The private pilot stated that during climb, about 10 minutes after takeoff, he felt a strong vibration in the engine, followed by an abrupt engine stoppage a few seconds later. During the subsequent forced landing onto rolling terrain that was surrounded by obstructions, the airplane struck a fence post, hit a ditch, and flipped over. An examination of the engine revealed that the crankshaft had fractured. The fracture was the result of fatigue cracking that initiated at the surface of the aft radius of the no. 2 main bearing journal. Heavy rubbing damage in the aft radius indicated that the bearing shifted aft and scored the radius resulting in fatigue initiation at the surface. A visual inspection of the crankcase mating surfaces revealed fretting, indicating that there was relative motion between the two crankcase halves. No evidence of heat distress or lack of lubrication was found. The engine, a Continental TSIO-520, had received a 'top' overhaul about 45 operating hours before the accident.
NTSB Probable Cause Narrative
A fatigue failure of the engine crankshaft. Factors contributing to the accident were the rolling terrain, and the fence.
Event Information
| Type of Event | Accident |
| Event Date | 8/18/1997 |
| Event Day of the Week | Monday |
| Time of Event | 1300 |
| Event Time Zone | Pacific Daylight Time |
| Event City | EDWALL |
| Event State | WASHINGTON |
| Event Country | -- |
| Zipcode of the event site | 99008 |
| Event Date Year | 1997 |
| Event Date Month | 8 |
| 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 | Unknown |
| Investigator's weather source | Pilot |
| Time of the weather observation | 0 |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | |
| Elevation of weather observation facility | 0 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 70 |
| Air Temperature at event time (in degrees celsius) | 29 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 160 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 15 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 1704 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Aug 18 1997 12:00AM |
| NTSB Notification Time | 1348 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 8 2000 12:30PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N6620Z |
| NTSB Number | SEA97LA193 |
| Missing Aircraft Indicator | N |
| 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 | Cessna |
| Aircraft Model | TU206G |
| Aircraft Series Identifier | TU206G |
| Aircraft Serial Number | U20606347 |
| Certified Max Gross Weight | 3600 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 6 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Jul 6 1997 12:00AM |
| Airframe hours since last inspection | 41 |
| Airframe Hours | 2138 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | ARRIOLA, D. M. |
| Aircraft Owner Street Address | 838 SUNKIST DRIVE |
| Aircraft Owner City | MOSES LAKE |
| Aircraft Owner State | WA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 98837 |
| Operator is an individual? | -- |
| Operator Name | |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | |
| Operator City | |
| Operator State | |
| Operator Country | |
| Operator Zip code | |
| Operator Code | |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| 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 | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | SFF |
| Departure City | SPOKANE |
| Departure State | WA |
| Departure Country | |
| Departure Time | 1250 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | MWH |
| Destination City | MOSES LAKE |
| Destination State | WA |
| Destination Country | |
| Specific Phase of Flight | Climb |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:30AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 0 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |