Aircraft Incident/Accident Report


Granby, Colorado 80446
Monday, June 11, 1984 7:00 MDT

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NTSB Narrative Summary Released at Completion of Accident
THE HELICOPTER PLT WAS ON A RECONNAISSANCE FLT TO SURVEY A HILLTOP LANDING SITE IN MOUNTAINOUS TERRAIN. WHEN HE ARRIVED, HE MADE A HIGH RECONNAISSANCE PASS, THEN BEGAN A LOW RECONNAISSANCE APCH. HE ESTIMATED THE WIND WAS FROM 210 DEG AT 10 TO 15 KTS WITH LIGHT TURBULENCE. HIS APCH WAS MADE ON A HEADING OF 200 DEG. HE BEGAN HIS APCH AT APRX 40 KTS & WITH A DESCENT RATE OF 200 FT/MIN. WHEN THE HELICOPTER WAS ABOUT 150 FT FROM THE HILLTOP & APRX 50 FT ABOVE IT, THE AIRSPEED DROPPED TO ZERO & THE RATE OF DESCENT INCREASED. THE PLT APPLIED FULL POWER & TURNED DOWN A VALLEY TO THE RIGHT, BUT COULD NOT STOP THE DESCENT. THE HELICOPTER THEN HIT A TREE, TOUCHED DOWN ON SLOPING TERRAIN & ROLLED OVER. THE ELEVATION & DENSITY ALT WERE ABOUT 9200 & 10,040 FT, RESPECTIVELY. THE HELICOPTER'S HOVER CEILING OUT OF GROUND EFFECT WAS ABOUT 8500 FT; IN GROUND EFFECT, THE HOVER CEILING WAS APRX 11,800 FT.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
Type of EventAccident 
Event Date6/11/1984 
Event Day of the WeekMonday 
Time of Event700 
Event Time ZoneMountain Daylight Time 
Event CityGRANBY  
Event StateCOLORADO 
Event Country-- 
Zipcode of the event site80446  
Event Date Year1984 
Event Date Month
MidAir Collision IndicatorNo 
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 airportOff Airport/Airstrip 
Distance from airport in statute miles
Degrees magnetic from airport
Airport Elevation-- 
Weather Briefing CompletenessNot pertinent 
Investigator's weather sourcePilot 
Time of the weather observation630  
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 ConditionsDay 
Lowest Ceiling Height
Lowest Non-Ceiling Height14000 
Sky/Lowest/Cloud ConditionsScattered 
Sky Condition for Lowest CeilingNone 
Visibility Runway Visual Range (Feet)
Visibility Runway Visual Value (Statute Miles)
Visibility (Statute Miles) 40 
Air Temperature at event time (in degrees celsius)
Dew Point at event time (in degress fahrenheit)-18 
Wind Direction (degrees magnetic)210 
Variable Wind IndicatorUnknown 
Wind Speed (knots)15 
Wind Velocity Indicator Unknown 
Wind Gust IndicatorNot Gusting 
Wind Gust (knots)
Altimeter Setting at event time (in. Hg) -- 
Density Altitude (feet)10043 
Intensity of PrecipitationUnknown 
METAR weather report -- 
Event Highest InjuryNone 
On Ground, Fatal Injuries
On Ground, Minor Injuries
On Ground, Serious Injuries
Injury Total Fatal-- 
Injury Total Minor-- 
Injury Total None
Injury Total Serious-- 
Injury Total All-- 
Investigating AgencyNTSB 
NTSB Docket Number (internal use)768 
NTSB Notification Source-- 
NTSB Notification Date-- 
NTSB Notification Time
Fiche Number and/or location -used to find docket information24473 
Date of most recent change to recordJan 2 2001 9:15AM 
User who most recently changed recorddbo  
Basic weather conditionsVisual Meteorological Cond 
FAA District Office-- 
Aircraft Involved
Aircraft #1
Aircraft Registration NumberN504HA 
NTSB NumberDEN84LA177  
Missing Aircraft Indicator
Federal Aviation Reg. PartPart 91: General Aviation 
Type of Flight Plan filedNone 
Flight plan Was Activated?-- 
DamageSubstantial 
Aircraft FireNone 
Aircraft ExplosionNone 
Aircraft Manufacturer's Full NameHILLER  
Aircraft ModelUH-12E  
Aircraft Series IdentifierUH-12E  
Aircraft Serial Number  
Certified Max Gross Weight2800 
Aircraft CategoryHelicopter 
Aircraft Registration ClassU.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
Fixed gear or retractable gearFixed 
Aircraft, Type of Last Inspection100 Hour 
Date of Last InspectionMay 23 1984 12:00AM 
Airframe hours since last inspection60 
Airframe Hours1700 
ELT InstalledNo 
ELT ActivatedUnknown 
ELT Aided Location of Event SiteUnknown 
ELT Type-- 
Aircraft Owner NameHOFFMAN PILOT CENTER, INC.  
Aircraft Owner Street AddressSUITE 7  
Aircraft Owner CityBROOMFIELD  
Aircraft Owner StateCO 
Aircraft Owner Country  
Aircraft Owner Zipcode  
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 certificateYes - certificate holder 
Other Operator of large aircraft?No 
Certified for Part 133 or 137 OperationExternal 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)Other Work Use 
Second Pilot on BoardNo 
Departure Point Same as EventYes 
Departure Airport Code  
Departure CityGRANBY  
Departure StateCO 
Departure Country  
Departure Time845 
Departure Time ZoneMDT 
Destination Same as Local Fltdest & departure same, accident can occur anywhere 
Destination Airport Code  
Destination City  
Destination State  
Destination Country  
Specific Phase of FlightDescent 
Report sent to ICAO?-- 
Evacuation occurred-- 
Date of most recent change to recordJan 2 2001 10:36AM 
User who most recently changed recorddbo  
Since inspection or accident-- 
Event Location Runway Number and Location0  
Runway Length-- 
Runway Width-- 
Sight Seeing flightNo 
Air Medical FlightNo 
Medical Flight--