Individually Owned: 150,657
Corporate Owned: 137,281
N/A Airport
Aircraft Accident/Incident Report
Nauvoo, Illinois 62345
Monday, July 15, 2013 11:30 CDT
NTSB Narrative Summary Released at Completion of Accident
The pilot reported that, as he was setting up for the initial aerial application run, he heard a “loud explosion,” at which point, the propeller stopped turning. Metallic debris emitted from the engine exhaust, which was followed by grinding noises coming from the engine. The pilot executed a forced landing to a soybean field, which resulted in the right main landing gear collapsing and the right wing sustaining substantial damage. A postaccident engine examination revealed that one compressor turbine blade separated from the disc as a result of fatigue. The remaining engine damage was due to the secondary impact of blade fragments during the failure sequence. Further examination of the initial compressor blade fracture surface was limited by the secondary damage sustained during the event.
NTSB Probable Cause Narrative
A fatigue failure of an engine compressor turbine blade, which resulted in extensive secondary engine damage and a complete loss of engine power.
Event Information
| Type of Event | Accident |
| Event Date | 7/15/2013 |
| Event Day of the Week | Monday |
| Time of Event | 1130 |
| Event Time Zone | Central Daylight Time |
| Event City | Nauvoo |
| Event State | ILLINOIS |
| Event Country | -- |
| Zipcode of the event site | 62345 |
| Event Date Year | 2013 |
| Event Date Month | 7 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 403260N |
| Event Location Longitude | 0912260W |
| Event Location Airport | N/A |
| 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 | 1135 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 8 |
| Weather Observation Facility ID | FSW |
| Elevation of weather observation facility | 722 |
| Distance of event from weather observation facility (units?) | 7 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | 3000 |
| Sky/Lowest/Cloud Conditions | Scattered |
| 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) | 29 |
| Dew Point at event time (in degress fahrenheit) | 23 |
| Wind Direction (degrees magnetic) | 160 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 3 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.25 |
| 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) | 33391 |
| NTSB Notification Source | FAA -- ACE ROC |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Jul 22 2014 4:50PM |
| User who most recently changed record | sort |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N6113C |
| NTSB Number | CEN13LA473 |
| 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 | AIR TRACTOR INC |
| Aircraft Model | AT-502B |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 502B-0275 |
| Certified Max Gross Weight | 8000 |
| 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 | 100 Hour |
| Date of Last Inspection | Jul 6 2013 12:00AM |
| Airframe hours since last inspection | 11 |
| Airframe Hours | 9961 |
| ELT Installed | No |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | Air Advantage Inc. |
| Aircraft Owner Street Address | 1720 S Lexington Avenue |
| Aircraft Owner City | Mt. Pleasant |
| Aircraft Owner State | IA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 52641 |
| Operator is an individual? | No |
| Operator Name | Air Advantage Inc. |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | 1720 S Lexington Avenue |
| Operator City | Mt. Pleasant |
| Operator State | IA |
| Operator Country | USA |
| Operator Zip code | 52641 |
| Operator Code | -- |
| Owner has at least one certificate | Yes - certificate holder |
| 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) | Aerial Application |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | IS51 |
| Departure City | Carthage |
| Departure State | IL |
| Departure Country | USA |
| Departure Time | 1125 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | IS51 |
| Destination City | Carthage |
| Destination State | IL |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Sep 26 2014 3:56PM |
| User who most recently changed record | sort |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | N/A |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |