Individually Owned: 150,657
Corporate Owned: 137,281
Napa County Airport
Aircraft Accident/Incident Report
Napa, California 94558
Wednesday, February 29, 2012 17:15 PST
NTSB Narrative Summary Released at Completion of Accident
The flight instructor reported that while hovering about 3 feet above the ground, he performed an autorotation demonstration for the second pilot. Although the flight instructor raised the collective to arrest the descent before landing, the helicopter made a firm landing, which resulted in substantial damage to the tailboom. The flight instructor reported no preimpact mechanical malfunction or failure that would have precluded normal operation.
The Federal Aviation Administration’s helicopter flying handbook identifies the proper techniques for practice autorotation maneuvers from altitude and indicates that one of the common errors that can occur during hovering autorotations is the pilot’s failure to apply up-collective pitch properly, which can result in a hard landing.
NTSB Probable Cause Narrative
The flight instructor’s improper use of the collective control during a practice hovering autorotation, which resulted in a hard landing.
Event Information
| Type of Event | Accident |
| Event Date | 2/29/2012 |
| Event Day of the Week | Wednesday |
| Time of Event | 1715 |
| Event Time Zone | Pacific Standard Time |
| Event City | Napa |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 94558 |
| Event Date Year | 2012 |
| Event Date Month | 2 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 381228N |
| Event Location Longitude | 1221630W |
| Event Location Airport | Napa County Airport |
| Event Location Nearest Airport ID | KAPC |
| 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 | 35 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1654 Pacific Standard Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | APC |
| Elevation of weather observation facility | 35 |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | PST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 10000 |
| Lowest Non-Ceiling Height | 5500 |
| Sky/Lowest/Cloud Conditions | Thin Broken |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 10 |
| Dew Point at event time (in degress fahrenheit) | 2 |
| Wind Direction (degrees magnetic) | 200 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 11 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.19 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | KAPC 290054Z 20011KT 10SM BKN055 OVC100 10/02 A301 |
| 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) | 30879 |
| NTSB Notification Source | Chief Pilot |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Dec 19 2012 4:11PM |
| User who most recently changed record | stam |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N341HP |
| NTSB Number | WPR12TA120 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Public Use |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | EUROCOPTER |
| Aircraft Model | AS 350 B3 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 3407 |
| Certified Max Gross Weight | 4961 |
| 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 | 100 Hour |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | 218 |
| Airframe Hours | 8027 |
| ELT Installed | No |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | CALIFORNIA HIGHWAY PATROL |
| Aircraft Owner Street Address | OFFICE OF AIR OPERATIONS |
| Aircraft Owner City | SACRAMENTO |
| Aircraft Owner State | CA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 95811-0208 |
| Operator is an individual? | No |
| Operator Name | CALIFORNIA HIGHWAY PATROL |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | OFFICE OF AIR OPERATIONS |
| Operator City | SACRAMENTO |
| Operator State | CA |
| Operator Country | USA |
| Operator Zip code | 95811-0208 |
| 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) | -- |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | Yes |
| Departure Airport Code | -- |
| Departure City | Napa |
| Departure State | CA |
| Departure Country | USA |
| Departure Time | -- |
| Departure Time Zone | PST |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | -- |
| Destination City | Napa |
| Destination State | CA |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Dec 19 2012 4:11PM |
| User who most recently changed record | stam |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | -- |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |