Individually Owned: 150,657
Corporate Owned: 137,281
Chino Airport
Aircraft Accident/Incident Report
Chino, California 91710
Friday, August 10, 2007 15:25 PDT
NTSB Narrative Summary Released at Completion of Accident
The helicopter landed hard during a practice autorotation maneuver. Following the private pilot's unsuccessful attempt at a 180-degree autorotation, the certificated flight instructor instructed him to perform the maneuver again. The private pilot entered the autorotation and as the descent proceeded, he utilized the collective to maintain the rotor revolutions per minute (rpm) within the normal operating range. Through the turn, the instructor noticed that the helicopter was gradually assuming a nose-low attitude. The instructor advised the student to level the helicopter and continue to maneuver through the turn. The instructor subsequently assumed authority of the flight controls and the helicopter continued to descend through 100 feet above ground level (agl). The helicopter was at an airspeed of 40 knots and vibrating with the low rotor warning horn sounding when the instructor leveled the helicopter as it simultaneously contacted the ground. The helicopter touched down hard and slid on its belly to the edge of the runway surface. The instructor reported no mechanical malfunctions or failures with the airframe or engine prior to the accident. He stated that the accident may have been prevented if he had assumed authority of the controls earlier in the maneuver.
NTSB Probable Cause Narrative
The private pilot's failure to maintain the proper airspeed and main rotor rpm, which resulted in a high rate of descent and subsequent hard landing. Also causal was the certificated flight instructor's delayed remedial action.
Event Information
| Type of Event | Accident |
| Event Date | 8/10/2007 |
| Event Day of the Week | Friday |
| Time of Event | 1525 |
| Event Time Zone | Pacific Daylight Time |
| Event City | Chino |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 91710 |
| Event Date Year | 2007 |
| Event Date Month | 8 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 335828N |
| Event Location Longitude | 1173811W |
| Event Location Airport | Chino Airport |
| Event Location Nearest Airport ID | KCNO |
| 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 | 652 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1535 Pacific Daylight Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | CNO |
| Elevation of weather observation facility | 652 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | PDT |
| 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) | 32 |
| Dew Point at event time (in degress fahrenheit) | 14 |
| Wind Direction (degrees magnetic) | 240 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 13 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.89 |
| 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) | 22246 |
| NTSB Notification Source | FAA |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Oct 31 2007 7:09AM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N10QD |
| NTSB Number | LAX07CA247 |
| Missing Aircraft Indicator | -- |
| 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 | R22 Beta |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 3526 |
| Certified Max Gross Weight | 1370 |
| 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 | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Aug 1 2007 12:00AM |
| Airframe hours since last inspection | 1 |
| Airframe Hours | 3748 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Silver State Helicopters LLC |
| Aircraft Owner Street Address | 2722 PERIMETER RD STE 207 |
| Aircraft Owner City | NORTH LAS VEGAS |
| Aircraft Owner State | NV |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 89032 |
| 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) | Instructional |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | CNO |
| Departure City | Chino |
| Departure State | CA |
| Departure Country | USA |
| Departure Time | 1500 |
| Departure Time Zone | -- |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | CNO |
| Destination City | Chino |
| Destination State | CA |
| Destination Country | USA |
| Specific Phase of Flight | Approach |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Sep 10 2007 4:33PM |
| User who most recently changed record | COOS |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 26L |
| Runway Length | 7000 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |