Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Silverton, Colorado 81433
Monday, September 6, 1999 8:30 MDT
NTSB Narrative Summary Released at Completion of Accident
The pilot said this was his first trip of the morning, and he was transporting approximately 300 pounds of construction materials. He said that the load was on the ground and he was hovering while ground personnel disconnected the cargo net. He said that one of the ground team radioed him and reported that 'fire and smoke was coming from your tail pipe.' The pilot said that he noticed that the rotor rpm warning light was on, and the engine out lights and horns had been activated. He lowered the collective and autorotated to the ground, but the main rotors impacted terrain. The aircraft records indicate that the engine came from a civilian overhaul facility, and was installed in N4085L approximately 21 hours prior to the accident. The Colorado Department of Minerals and Mines reported the mine entrance elevation was 11,500 feet. The density altitude was calculated to be 13,000 feet.
NTSB Probable Cause Narrative
The total loss of engine power for undetermined reasons. A factor was the lack of suitable terrain for a forced landing.
Event Information
| Type of Event | Accident |
| Event Date | 9/6/1999 |
| Event Day of the Week | Monday |
| Time of Event | 830 |
| Event Time Zone | Mountain Daylight Time |
| Event City | SILVERTON |
| Event State | COLORADO |
| Event Country | -- |
| Zipcode of the event site | 81433 |
| Event Date Year | 1999 |
| Event Date Month | 9 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| 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 | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 853 Mountain Daylight Time |
| Direction of event from weather observation facility (degrees) | 320 |
| Weather Observation Facility ID | MTJ |
| Elevation of weather observation facility | 5759 |
| Distance of event from weather observation facility (units?) | 40 |
| Time Zone of the weather observation | MDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| 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) | 16 |
| Dew Point at event time (in degress fahrenheit) | 7 |
| Wind Direction (degrees magnetic) | 130 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 8 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 30 |
| Density Altitude (feet) | 13000 |
| 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) | 1174 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Sep 6 1999 12:00AM |
| NTSB Notification Time | 1249 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Jan 10 2001 9:57AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N4085L |
| NTSB Number | DEN99LA160 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 133: Rotorcraft Ext. Load |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Bell |
| Aircraft Model | UH-1H |
| Aircraft Series Identifier | UH-1H |
| Aircraft Serial Number | 68-15655 |
| Certified Max Gross Weight | -- |
| 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 | -- |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Oct 12 1999 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 3854 |
| ELT Installed | Unknown |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | HIGH COUNTRY HELICOPTERS, INC. |
| Aircraft Owner Street Address | 1551 6450 RD. |
| Aircraft Owner City | MONTROSE |
| Aircraft Owner State | CO |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 81401 |
| Operator is an individual? | -- |
| 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 | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | External Load |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Unknown |
| Indicates Domestic or International Flight | Unknown |
| Operator carrying Pax/Cargo/Mail | Unknown |
| Type of Flying (Per_Bus / Primary) | Other Work Use |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | NONE |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 810 |
| Departure Time Zone | MDT |
| 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 | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 10 2001 12:27PM |
| 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 | -- |