Individually Owned: 150,657
Corporate Owned: 137,281
Augusta Regional Airport
Aircraft Accident/Incident Report
Augusta, Georgia 30906
Monday, July 18, 2011 12:25 EDT
NTSB Narrative Summary Released at Completion of Accident
Maintenance personnel reported that, 2 days before the accident, they were hired by the pilot to prepare the airplane for a maintenance ferry flight following a gear-up landing. While inspecting the airplane, the mechanic noted that the three-blade propeller was bent, so he removed it. Subsequently, the pilot provided maintenance personnel with a two-blade propeller, which they installed. However, when the mechanic attempted to replace the spinner, it would not fit properly. Therefore, he did not sign off the logbooks and advised the pilot that the airplane should not be flown. Review of the airplane’s records revealed that the airplane had a supplemental type certificate for an engine conversion kit that required a three-blade propeller. On the day of the accident, another mechanic conducted a run-up of the engine and noted that the propeller was not working correctly. The supplier of the two-blade propeller advised the mechanic that the airplane should not be flown in that condition. The mechanic discussed the anomaly with the pilot and advised him not to fly the airplane until the issue was resolved. The pilot acknowledged the discrepancy but chose to fly the airplane. Shortly after takeoff, witnesses observed the propeller separate from the airplane. Subsequently, the airplane spiraled to the ground in a nose-down attitude. Examinations revealed that the propeller attachment bolts had failed, which resulted in the separation of the propeller from the airplane. Five of the six propeller mounting studs exhibited evidence of high-stress fatigue cracking, which indicates that a severe spectrum of cyclic loading in the propeller/engine system occurred, likely as the result of using an unapproved propeller on the airplane.
NTSB Probable Cause Narrative
The pilot’s decision to fly the airplane after maintenance personnel advised him that the airplane should not be flown because the pilot provided an incorrect propeller for installation and the subsequent failure of the propeller attachment bolts and the separation of the propeller.
Event Information
| Type of Event | Accident |
| Event Date | 7/18/2011 |
| Event Day of the Week | Monday |
| Time of Event | 1225 |
| Event Time Zone | Eastern Daylight Time |
| Event City | Augusta |
| Event State | GEORGIA |
| Event Country | -- |
| Zipcode of the event site | 30906 |
| Event Date Year | 2011 |
| Event Date Month | 7 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 332202N |
| Event Location Longitude | 0815714W |
| Event Location Airport | Augusta Regional Airport |
| Event Location Nearest Airport ID | AGS |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 144 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1253 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | AGS |
| Elevation of weather observation facility | 144 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | EDT |
| 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) | 32 |
| Dew Point at event time (in degress fahrenheit) | 17 |
| Wind Direction (degrees magnetic) | 70 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Light and Variable |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.1 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Fatal |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | 1 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 32518 |
| NTSB Notification Source | FAA Southern ROC |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Apr 9 2014 1:03PM |
| User who most recently changed record | kenj |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N777CV |
| NTSB Number | ERA11FA406 |
| 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 | Ground |
| Aircraft Explosion | Ground |
| Aircraft Manufacturer's Full Name | MOONEY AIRCRAFT CORP. |
| Aircraft Model | M20K |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 25-0149 |
| Certified Max Gross Weight | 3374 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | 2 |
| Cabin Crew Seats | -- |
| Passenger Seats | 1 |
| Total number of seats on the aircraft | 3 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | May 1 2010 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 2723 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | C91 |
| Aircraft Owner Name | WILSON THOMAS S MD |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | MOORESVILLE |
| Aircraft Owner State | NC |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 28117-9405 |
| Operator is an individual? | No |
| Operator Name | WILSON THOMAS S MD |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | MOORESVILLE |
| Operator State | NC |
| Operator Country | USA |
| Operator Zip code | 28117-9405 |
| Operator Code | -- |
| 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) | Flight Test |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | AGS |
| Departure City | Augusta |
| Departure State | GA |
| Departure Country | USA |
| Departure Time | 1220 |
| Departure Time Zone | EDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | AGS |
| Destination City | Augusta |
| Destination State | GA |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Apr 9 2014 1:03PM |
| User who most recently changed record | kenj |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 17 |
| Runway Length | 8001 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |