Individually Owned: 150,657
Corporate Owned: 137,281
Mansfield Municipal Airport
Aircraft Accident/Incident Report
Mansfield, Massachusetts 02048
Monday, August 16, 1999 16:37 EDT
NTSB Narrative Summary Released at Completion of Accident
With his instructor outside the helicopter watching, the student pilot attempted to bring the helicopter to a hover. With the left skid in the air and the entire right skid on the ground, the helicopter rolled over. No pre-impact failures or malfunctions were found. Federal Aviation Administration Advisory Circular 90-87 (Helicopter Dynamic Rollover) states the following; 'During normal or slope takeoffs and landings with...one skid/wheel on the ground, the bank angle or side drift can place the helicopter in a situation where it is pivoting (rolling) about a skid/wheel which is still in contact with the ground....if a roll rate is permitted to develop, a critical bank angle...may be reached where roll cannot be corrected, even with full lateral cyclic.' The student pilot had logged a total of 27 hours of flight experience with all 27 hours in helicopters.
NTSB Probable Cause Narrative
Was the student pilot's failure to maintain lateral control of the helicopter while bringing it to a hover. A factor in the accident was the student pilot's lack of total experience in helicopters.
Event Information
| Type of Event | Accident |
| Event Date | 8/16/1999 |
| Event Day of the Week | Monday |
| Time of Event | 1637 |
| Event Time Zone | Eastern Daylight Time |
| Event City | MANSFIELD |
| Event State | MASSACHUSETTS |
| Event Country | -- |
| Zipcode of the event site | 02048 |
| Event Date Year | 1999 |
| Event Date Month | 8 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | MANSFIELD MUNICIPAL |
| Event Location Nearest Airport ID | 1B9 |
| 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 | 122 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1553 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | 359 |
| Weather Observation Facility ID | OWD |
| Elevation of weather observation facility | 50 |
| Distance of event from weather observation facility (units?) | 13 |
| Time Zone of the weather observation | EDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 5500 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Unknown |
| Sky Condition for Lowest Ceiling | Broken |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 28 |
| Dew Point at event time (in degress fahrenheit) | 16 |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Variable |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | 1 |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 499 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Aug 16 1999 12:00AM |
| NTSB Notification Time | 1735 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 12 2000 11:51AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N20879 |
| NTSB Number | NYC99LA204 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Robinson |
| Aircraft Model | R-22 |
| Aircraft Series Identifier | R-22 |
| Aircraft Serial Number | 1442 |
| Certified Max Gross Weight | 1100 |
| Aircraft Category | Helicopter |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| 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 | 100 Hour |
| Date of Last Inspection | Aug 9 1999 12:00AM |
| Airframe hours since last inspection | 31 |
| Airframe Hours | 1132 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | BEVERLY MERTA |
| Aircraft Owner Street Address | 38 HAMMOND PL |
| Aircraft Owner City | WOBURN |
| Aircraft Owner State | MA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 01801 |
| Operator is an individual? | -- |
| Operator Name | NORTHERN LIGHTS HELICOPTERS |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 106 ACCESS RD |
| Operator City | NORWOOD |
| Operator State | MA |
| Operator Country | |
| Operator Zip code | 02062 |
| Operator Code | |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| 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) | Instructional |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | 1B9 |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 1637 |
| Departure Time Zone | EDT |
| 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 | Takeoff |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:35AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 0 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |