Individually Owned: 150,657
Corporate Owned: 137,281
Martin Field Airport
Aircraft Accident/Incident Report
Bronson, Iowa 51007
Wednesday, August 10, 2011 9:45 CDT
NTSB Narrative Summary Released at Completion of Accident
The pilot reported that the airplane’s airspeed decayed when he maneuvered to avoid some high tension power lines, while conducting an agricultural application pass. He leveled the wings and applied full engine power. The pilot turned further in an effort to avoid a populated area and toward a low point in the rising terrain. The airplane then entered a valley located between rolling hills, at which time the airplane started to sink. The airplane's right wing struck a tree and the airplane subsequently impacted the ground. The airplane sustained substantial damage to the right wing and fuselage. The pilot reported that there were no mechanical malfunctions or anomalies with the airplane.
NTSB Probable Cause Narrative
The pilot's failure to maintain clearance from terrain while maneuvering during an aerial application flight.
Event Information
| Type of Event | Accident |
| Event Date | 8/10/2011 |
| Event Day of the Week | Wednesday |
| Time of Event | 945 |
| Event Time Zone | Central Daylight Time |
| Event City | Bronson |
| Event State | IOWA |
| Event Country | -- |
| Zipcode of the event site | 51007 |
| Event Date Year | 2011 |
| Event Date Month | 8 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 422350N |
| Event Location Longitude | 0961323W |
| Event Location Airport | Martin Field |
| Event Location Nearest Airport ID | 7K8 |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 12 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 1100 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 952 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 267 |
| Weather Observation Facility ID | SUX |
| Elevation of weather observation facility | 1098 |
| Distance of event from weather observation facility (units?) | 8 |
| Time Zone of the weather observation | CDT |
| 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) | 22 |
| Dew Point at event time (in degress fahrenheit) | 12 |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | -- |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.99 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | KSUX 101452Z 00000KT 10SM CLR 22/12 A2999 |
| 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) | 28931 |
| 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 | Oct 12 2011 11:18AM |
| User who most recently changed record | andj |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N9054W |
| NTSB Number | CEN11CA565 |
| 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 | WEATHERLY |
| Aircraft Model | 201C |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 1022 |
| Certified Max Gross Weight | 4800 |
| 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 | May 17 2011 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 4837 |
| ELT Installed | No |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | Sioux Air Inc |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | South Sioux City |
| Aircraft Owner State | NE |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 68776 |
| Operator is an individual? | No |
| Operator Name | Sioux Air Inc |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | South Sioux City |
| Operator State | NE |
| Operator Country | USA |
| Operator Zip code | 68776 |
| Operator Code | -- |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| 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 | 7K8 |
| Departure City | S Sioux City |
| Departure State | NE |
| Departure Country | USA |
| Departure Time | 930 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | 7K8 |
| Destination City | S Sioux City |
| Destination State | NE |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Aug 31 2011 2:49PM |
| User who most recently changed record | sort |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | N/A |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |