Individually Owned: 150,657
Corporate Owned: 137,281
Brokeenstraw Airport
Aircraft Accident/Incident Report
Pittsfield, Pennsylvania 16340
Saturday, May 19, 2012 17:17 EDT
NTSB Narrative Summary Released at Completion of Accident
According to the student pilot, who had about 36 hours total flight time, he had completed a solo flight earlier in the day that included seven takeoffs and landings. After refueling, he completed a local flight and returned to the departure airport, where he initiated an approach that terminated "perfectly" in a normal hover. However, the helicopter then "started spinning to the right," and the spin could not be arrested with full application of left pedal. The pilot stated that he then increased collective pitch and the corresponding increase in engine power aggravated the spin. He then attempted a hovering autorotation, but the helicopter landed hard, rolled over on to its side, and was substantially damaged. A witness described the helicopter as it approached "flying somewhat erratically" about 40 feet above the runway. The helicopter was "twisting" to the left and right as it hovered "shakily" closer to the runway. The helicopter noise increased, the nose pitched up, the main rotors struck the ground, and the helicopter came to rest on its side. A detailed examination of the wreckage revealed no preimpact mechanical malfunctions or anomalies that would have precluded normal operation. A Federal Aviation Administration advisory circular stated that loss of tail rotor effectiveness (LTE) is a critical, low-speed aerodynamic flight characteristic which could result in an uncommanded rapid yaw rate which does not subside of its own accord and, if not corrected, could result in the loss of aircraft control. Further, any maneuver that required the pilot to operate in a high-power, low-airspeed environment with a left crosswind or tailwind would create an environment where unanticipated right yaw may occur. The nearest weather reporting station, which was located about 19 nautical miles from the accident site, recorded a 7-knot, left quartering tailwind for the landing on runway 9.
NTSB Probable Cause Narrative
The student pilot's failure to maintain helicopter control during an encounter with loss of tail rotor effectiveness.
Event Information
| Type of Event | Accident |
| Event Date | 5/19/2012 |
| Event Day of the Week | Saturday |
| Time of Event | 1717 |
| Event Time Zone | Eastern Daylight Time |
| Event City | Pittsfield |
| Event State | PENNSYLVANIA |
| Event Country | -- |
| Zipcode of the event site | 16340 |
| Event Date Year | 2012 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 414935N |
| Event Location Longitude | 0792141W |
| Event Location Airport | Brokeenstraw Airport |
| Event Location Nearest Airport ID | P15 |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 1 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 1230 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1715 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | KJHW |
| Elevation of weather observation facility | 1723 |
| Distance of event from weather observation facility (units?) | 19 |
| 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) | 26 |
| Dew Point at event time (in degress fahrenheit) | 8 |
| Wind Direction (degrees magnetic) | 330 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 7 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.17 |
| 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) | 30959 |
| NTSB Notification Source | FAA Eastern ROC |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Jan 25 2013 4:13PM |
| User who most recently changed record | gots |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N74914 |
| NTSB Number | ERA12CA357 |
| 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 | TH-55 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 67-15442 |
| Certified Max Gross Weight | 1670 |
| Aircraft Category | Helicopter |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | 2 |
| 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 | Aug 8 2011 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 12905 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | Unknown |
| Aircraft Owner Name | STEVEN AND GAIL TACHOIR |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | WARREN |
| Aircraft Owner State | PA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 16365-2518 |
| Operator is an individual? | No |
| Operator Name | STEVEN TACHOIR |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | WARREN |
| Operator State | PA |
| Operator Country | USA |
| Operator Zip code | 16365-2518 |
| 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 | Non-scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | -- |
| Type of Flying (Per_Bus / Primary) | Personal |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | P15 |
| Departure City | Pittsfield |
| Departure State | PA |
| Departure Country | USA |
| Departure Time | 1500 |
| Departure Time Zone | EDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | P15 |
| Destination City | Pittsfield |
| Destination State | PA |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 25 2013 4:13PM |
| User who most recently changed record | gots |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | 09 |
| Runway Length | 2665 |
| Runway Width | 100 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |