Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Tucson, Arizona 85701
Monday, July 7, 2003 18:34 MST
NTSB Narrative Summary Released at Completion of Accident
After a series of water drops were conducted on a forest fire, the helicopter's crew refilled the fixed tank with water from a dip tank via a snorkel. The dip tank was located in mountainous terrain and there were two mesquite trees near the tank. During the refilling operation, the tail rotor blades contacted the trees; however, the flight crew was unaware of the strike. The tail rotor blade damage was noticed when ground personnel detected damage to the number one exhaust stack, and the helicopter was inspected further. One of the four tail rotor blades incurred spar damage on the leading edge, approximately 14.5 inches from the tip end.
NTSB Probable Cause Narrative
the pilot's failure to maintain tail rotor clearance while hovering resulting in a tail rotor blade strike.
Event Information
| Type of Event | Accident |
| Event Date | 7/7/2003 |
| Event Day of the Week | Monday |
| Time of Event | 1834 |
| Event Time Zone | Mountain Standard Time |
| Event City | Tucson |
| Event State | ARIZONA |
| Event Country | -- |
| Zipcode of the event site | 85701 |
| Event Date Year | 2003 |
| Event Date Month | 7 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 320600N |
| Event Location Longitude | 1105600W |
| 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 | 30 |
| Degrees magnetic from airport | 360 |
| Airport Elevation | 2810 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1755 Mountain Standard Time |
| Direction of event from weather observation facility (degrees) | 360 |
| Weather Observation Facility ID | TUS |
| Elevation of weather observation facility | 2829 |
| Distance of event from weather observation facility (units?) | 30 |
| Time Zone of the weather observation | MST |
| 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) | 40 |
| Dew Point at event time (in degress fahrenheit) | 8 |
| Wind Direction (degrees magnetic) | 300 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 13 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Gusting |
| Wind Gust (knots) | 24 |
| Altimeter Setting at event time (in. Hg) | 29.8 |
| Density Altitude (feet) | 6547 |
| 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) | 16132 |
| NTSB Notification Source | U.S. Forest Service |
| NTSB Notification Date | Jul 8 2003 12:00AM |
| NTSB Notification Time | 1400 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Sep 1 2004 7:08AM |
| User who most recently changed record | NTSB\MONR |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | WP-SDL-FSDO |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N6979R |
| NTSB Number | LAX03TA229 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 133: Rotorcraft Ext. Load |
| Type of Flight Plan filed | Company VFR |
| Flight plan Was Activated? | Yes |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Sikorsky |
| Aircraft Model | S-64E |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 64079 |
| Certified Max Gross Weight | 42000 |
| 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 | 3 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | -- |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | 12746.9 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | U.S. Forest Service |
| Aircraft Owner Street Address | 3850 Three Mile Lane |
| Aircraft Owner City | McMinnville |
| Aircraft Owner State | OR |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 97128 |
| Operator is an individual? | No |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | -- |
| Operator City | Tucson |
| Operator State | AZ |
| Operator Country | USA |
| Operator Zip code | 85701 |
| Operator Code | -- |
| Owner has at least one certificate | -- |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | External Load |
| 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) | Public Use |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | KTUS |
| Departure City | Tucson |
| Departure State | AZ |
| Departure Country | USA |
| Departure Time | 1715 |
| Departure Time Zone | MST |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | -- |
| Destination City | Sabino Helispot |
| Destination State | AZ |
| Destination Country | USA |
| Specific Phase of Flight | Maneuvering - aerial application |
| Report sent to ICAO? | No |
| Evacuation occurred | No |
| Date of most recent change to record | Jun 18 2004 5:39PM |
| User who most recently changed record | COOS |
| 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 | -- |