Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Fairview, Montana 58838
Monday, June 20, 2005 9:30 MDT
NTSB Narrative Summary Released at Completion of Accident
While en route at approximately 100 feet above the ground during an aerial application operation, one of the airplane's two propeller blades separated from the propeller hub. Subsequently, the remaining propeller blade and hub separated from the airplane, culminating with the pilot making a forced landing to an open field. Examination of the propeller assembly revealed that the propeller blade model was the correct blade for the propeller; however, the propeller model was not approved for the Cessna 188A with a TCM IO-520 engine. It was also revealed that the propeller should have been filled with red dyed oil for crack detection. A visual inspection of the aircraft revealed no evidence of red dyed oil on the surface of either propeller blade or the propeller hub. A further inspection of the separated propeller blade indicated that the failure occurred within the outboard blade retention threads.
NTSB Probable Cause Narrative
While in cruise flight a separation of a propeller blade as a result of a propeller hub crack. Factors contributing to the accident included the installation of an unapproved propeller, and the failure to properly service the propeller with red dyed oil for crack protection.
Event Information
| Type of Event | Accident |
| Event Date | 6/20/2005 |
| Event Day of the Week | Monday |
| Time of Event | 930 |
| Event Time Zone | Mountain Daylight Time |
| Event City | Fairview |
| Event State | MONTANA |
| Event Country | -- |
| Zipcode of the event site | 58838 |
| Event Date Year | 2005 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 475150N |
| Event Location Longitude | 1043759W |
| 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 | 935 Mountain Daylight Time |
| Direction of event from weather observation facility (degrees) | 270 |
| Weather Observation Facility ID | SDY |
| Elevation of weather observation facility | 1984 |
| Distance of event from weather observation facility (units?) | 27 |
| Time Zone of the weather observation | MDT |
| 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) | 9 |
| Air Temperature at event time (in degrees celsius) | 23 |
| Dew Point at event time (in degress fahrenheit) | 14 |
| Wind Direction (degrees magnetic) | 140 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 4 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.14 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | 1 |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 18849 |
| NTSB Notification Source | Regional Operations Center |
| NTSB Notification Date | Jun 20 2005 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Dec 20 2005 6:27AM |
| User who most recently changed record | NTSB\JOHB |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Helena, Montana |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N2133U |
| NTSB Number | SEA05LA121 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 137: Agricultural |
| 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 | 188A |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 18800653 |
| Certified Max Gross Weight | 3300 |
| 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 | 1 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | -- |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Roy Mehling |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Hardin |
| Aircraft Owner State | MT |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 59034 |
| Operator is an individual? | Yes |
| Operator Name | Craig Mehling |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | -- |
| Operator City | Hardin |
| Operator State | MT |
| Operator Country | USA |
| Operator Zip code | 59034 |
| Operator Code | -- |
| Owner has at least one certificate | -- |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | Agriculture |
| 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) | Aerial Application |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | 5U6 |
| Departure City | Fairview |
| Departure State | MT |
| Departure Country | USA |
| Departure Time | 915 |
| Departure Time Zone | MDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | -- |
| Destination City | -- |
| Destination State | -- |
| Destination Country | -- |
| Specific Phase of Flight | Cruise |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Sep 19 2005 4:43PM |
| User who most recently changed record | STAM |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |