Individually Owned: 151,845
Corporate Owned: 143,699
Aircraft Accident/Incident Report
Pasco, Washington 99302
Monday, June 4, 2012 6:45 PDT
NTSB Narrative Summary Released at Completion of Accident
The pilot of the helicopter was maneuvering at a low altitude over a fruit orchard to dry the trees. After completing one section of the orchard, he climbed higher in order to check for obstacles near the adjacent orchard that he planned to dry next. While descending into position to work the adjacent orchard, the pilot noticed that the main rotor rpm was beginning to decay. Although he added some power, the rpm decay continued. He therefore made the decision to lower the collective, but realized he was too low to do so. Because he still had some forward airspeed and was able to maintain a controlled descent, the pilot maneuvered to land in an opening between the trees; however, the helicopter impacted trees just before it touched down. A postaccident examination of the engine and airframe revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.
NTSB Probable Cause Narrative
The pilot's failure to maintain the helicopter's rotor rpm while maneuvering at a low altitude over a fruit orchard.
Event Information
| Type of Event | Accident |
| Event Date | 6/4/2012 |
| Event Day of the Week | Monday |
| Time of Event | 645 |
| Event Time Zone | Pacific Daylight Time |
| Event City | Pasco |
| Event State | WASHINGTON |
| Event Country | -- |
| Zipcode of the event site | 99302 |
| Event Date Year | 2012 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 462310N |
| Event Location Longitude | 1191429W |
| Event Location Airport | -- |
| Event Location Nearest Airport ID | -- |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Pilot |
| Time of the weather observation | |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | -- |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | -- |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 11000 |
| Lowest Non-Ceiling Height | 7500 |
| Sky/Lowest/Cloud Conditions | Few |
| 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) | 9 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | -- |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | -- |
| 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) | 30961 |
| NTSB Notification Source | FAA Operations Center SEA |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Jan 28 2013 3:14PM |
| User who most recently changed record | stam |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N93467 |
| NTSB Number | WPR12LA244 |
| 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 | HILLER |
| Aircraft Model | UH-12B |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 589 |
| Certified Max Gross Weight | 2500 |
| Aircraft Category | Helicopter |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | 1 |
| Cabin Crew Seats | -- |
| Passenger Seats | 2 |
| Total number of seats on the aircraft | 3 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Mar 18 2012 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 3627 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | ENVIRONMENTAL SITE RESTORATION INC |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | OAKHURST |
| Aircraft Owner State | CA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 93644-4086 |
| Operator is an individual? | No |
| Operator Name | Larsen Helicopter Operations |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | -- |
| Operator City | The Dalles |
| Operator State | OR |
| Operator Country | USA |
| Operator Zip code | 97058 |
| 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) | Other Work Use |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | KPSC |
| Departure City | Pasco |
| Departure State | WA |
| Departure Country | USA |
| Departure Time | 615 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | KPSC |
| Destination City | Pasco |
| Destination State | WA |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 28 2013 3:14PM |
| User who most recently changed record | stam |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | N/A |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |