Individually Owned: 150,657
Corporate Owned: 137,281
None Airport
Aircraft Accident/Incident Report
Stratford, Oklahoma 74872
Friday, July 20, 2007 11:00 CDT
NTSB Narrative Summary Released at Completion of Accident
The 5,770-hour commercial pilot/owner/builder of the single-engine experimental helicopter was in cruise flight at an altitude of approximately 1,000 feet, at an estimated airspeed between 70 and 100 knots, when "the helicopter suddenly yawed to the right." The pilot immediately and simultaneously applied left torque pedal to stop the yaw, lowered the collective, and entered an autorotation into the wind, at an airspeed of 70 knots. The helicopter touched down in an "uneven" field, rolled over, and came to rest on its left side. The pilot added that there were no warnings prior to or during the loss of power. A review of photographs of the damaged helicopter revealed structural damage to the airframe. The pilot reported that he had a total of 10 gallons of fuel on board at the time he departed and there was a small fuel spill at the accident site. At the time of the accident, the helicopter had accrued a total of 60.6 hours. Examination of the engine by the pilot revealed that the supercharger had seized which accounted for the loss of engine power.
NTSB Probable Cause Narrative
The loss of engine power due to a seized supercharger. A contributing factor was the lack of suitable terrain for the forced landing.
Event Information
| Type of Event | Accident |
| Event Date | 7/20/2007 |
| Event Day of the Week | Friday |
| Time of Event | 1100 |
| Event Time Zone | Central Daylight Time |
| Event City | Stratford |
| Event State | OKLAHOMA |
| Event Country | -- |
| Zipcode of the event site | 74872 |
| Event Date Year | 2007 |
| Event Date Month | 7 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 344728N |
| Event Location Longitude | 0965722W |
| Event Location Airport | None |
| 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 | 1610 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 90 |
| Weather Observation Facility ID | ADH |
| Elevation of weather observation facility | 1016 |
| Distance of event from weather observation facility (units?) | 16 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | 2300 |
| 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) | 22 |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.06 |
| 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) | 22382 |
| NTSB Notification Source | OCK FSDO |
| NTSB Notification Date | Jul 20 2007 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Nov 29 2007 8:02AM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Oklahoma FAA/FSDO |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N888TD |
| NTSB Number | DFW07LA167 |
| 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 | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Rotorway |
| Aircraft Model | 162F |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 001 |
| Certified Max Gross Weight | 1210 |
| Aircraft Category | Helicopter |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | Yes |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Feb 1 2006 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 60.6 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Thomas Lister |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Stratford |
| Aircraft Owner State | TX |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 74872 |
| Operator is an individual? | No |
| 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? | -- |
| 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) | Personal |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | NONE |
| Departure City | Stratford |
| Departure State | OK |
| Departure Country | USA |
| Departure Time | 1045 |
| Departure Time Zone | CDT |
| 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 27 2007 1:43PM |
| User who most recently changed record | CASH |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |