Individually Owned: 150,657
Corporate Owned: 137,281
Wolf Lake Airport
Aircraft Accident/Incident Report
Palmer, Alaska 99645
Monday, September 28, 2009 17:00 AKD
NTSB Narrative Summary Released at Completion of Accident
The pilot was departing on a local flight in a turbine-powered helicopter. During the initial climb, about 35 feet above the ground, the engine lost power. The pilot entered an autorotation and attempted to cushion the landing, but the helicopter landed hard and the main rotor blades struck the tail boom, severing it from the helicopter. After the accident the engine continued to run, but at low power, requiring the pilot to close the engine throttle and shutdown the engine. A Federal Aviation Administration (FAA) postaccident examination revealed no preaccident mechanical anomalies with the engine or helicopter. The engine was removed from the helicopter, shipped to an engine service center, and placed in an engine test cell. At the direction of an FAA airworthiness inspector, and assisted by an air safety investigator from the engine manufacturer, the engine produced power that was within the manufacturer's performance standards.
NTSB Probable Cause Narrative
A partial loss of engine power after take off for an undetermined reason, which resulted in a hard landing.
Event Information
| Type of Event | Accident |
| Event Date | 9/28/2009 |
| Event Day of the Week | Monday |
| Time of Event | 1700 |
| Event Time Zone | -- |
| Event City | Palmer |
| Event State | ALASKA |
| Event Country | -- |
| Zipcode of the event site | 99645 |
| Event Date Year | 2009 |
| Event Date Month | 9 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 613800N |
| Event Location Longitude | 1491719W |
| Event Location Airport | Wolf Lake Airport |
| Event Location Nearest Airport ID | 4AK6 |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | 572 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1653 Atlantic Daylight Time |
| Direction of event from weather observation facility (degrees) | 120 |
| Weather Observation Facility ID | PAAQ |
| Elevation of weather observation facility | 242 |
| Distance of event from weather observation facility (units?) | 6 |
| Time Zone of the weather observation | ADT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | 2600 |
| 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) | 7 |
| Dew Point at event time (in degress fahrenheit) | 1 |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | Variable |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Light and Variable |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.98 |
| 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 | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 27128 |
| NTSB Notification Source | FAA 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 7 2010 5:21PM |
| User who most recently changed record | stam |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N501SU |
| NTSB Number | ANC09LA110 |
| 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 | HUGHES |
| Aircraft Model | 369A (OH-6A) |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 480435 |
| Certified Max Gross Weight | -- |
| Aircraft Category | Helicopter |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 4 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | -- |
| 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 | C91-A |
| Aircraft Owner Name | COMPASS ROSE LLC |
| Aircraft Owner Street Address | 6382 E BEECHCRAFT RD |
| Aircraft Owner City | WASILLA |
| Aircraft Owner State | AK |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 99654-9332 |
| Operator is an individual? | No |
| Operator Name | -- |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | -- |
| Operator City | -- |
| Operator State | -- |
| Operator Country | USA |
| Operator Zip code | -- |
| Operator Code | -- |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | No |
| 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 | 4AK6 |
| Departure City | Wasilla |
| Departure State | AK |
| Departure Country | USA |
| Departure Time | 1700 |
| Departure Time Zone | ADT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | 4AK6 |
| Destination City | Wasilla |
| Destination State | AK |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jul 7 2010 5:21PM |
| User who most recently changed record | stam |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 06 |
| Runway Length | 3800 |
| Runway Width | 70 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |