Aircraft Accident/Incident Report

Cheyenne, Wyoming 82001
Friday, May 30, 2003 9:00 MDT

NTSB Narrative Summary Released at Completion of Accident

According to the pilot, he was spraying vegetation along the railroad. He was reversing course for a second application pass and began a "cyclic climb/ag turn" when he encountered a gust of wind, "approximately 15-20 miles per hour," from his "6 o'clock position." The pilot stated he was unable to recover before he hit the ground. Subsequently, the helicopter rolled on its right side, and the main rotor blades separated. Approximately 11 minutes after the accident, winds in the area were reported as 320 degrees at 12 knots with gusts to 17 knots.

NTSB Probable Cause Narrative

the pilot's failure to maintain aircraft control. A contributing to the accident was the sudden tailwind encountered.

Event Information

Type of Event Accident
Event Date 5/30/2003
Event Day of the Week Friday
Time of Event 900
Event Time Zone Mountain Daylight Time
Event City Cheyenne
Event State WYOMING
Event Country --
Zipcode of the event site 82001
Event Date Year 2003
Event Date Month 5
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 410225N
Event Location Longitude 1045305W
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 5
Degrees magnetic from airport 180
Airport Elevation --
Weather Briefing Completeness Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 911 Mountain Daylight Time
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID CYS
Elevation of weather observation facility 6156
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation MDT
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) 26
Dew Point at event time (in degress fahrenheit) 6
Wind Direction (degrees magnetic) 320
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 12
Wind Velocity Indicator --
Wind Gust Indicator Gusting
Wind Gust (knots) 17
Altimeter Setting at event time (in. Hg) 30.08
Density Altitude (feet) 8760
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) 14710
NTSB Notification Source Casper FSFO
NTSB Notification Date May 30 2003 12:00AM
NTSB Notification Time 1030
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Feb 5 2004 4:26PM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office Casper, WY

Aircraft Involved

Aircraft #1

Aircraft Registration Number N508SQ
NTSB Number DEN03LA092
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 137: Agricultural
Type of Flight Plan filed None
Flight plan Was Activated? No
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Hiller
Aircraft Model UH-12E
Aircraft Series Identifier --
Aircraft Serial Number 5086
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 3
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Unknown
Date of Last Inspection --
Airframe hours since last inspection --
Airframe Hours --
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Reforestation Services Inc.
Aircraft Owner Street Address 5669 Commercial ST. SE.
Aircraft Owner City Salem
Aircraft Owner State OR
Aircraft Owner Country USA
Aircraft Owner Zipcode 97302
Operator is an individual? Yes
Operator Name David A. McDaniel
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address On File
Operator City Bend
Operator State OR
Operator Country USA
Operator Zip code 97707
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) Aerial Application
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code NONE
Departure City Cheyenne
Departure State WY
Departure Country USA
Departure Time 845
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 Cruise - normal
Report sent to ICAO? No
Evacuation occurred --
Date of most recent change to record Nov 18 2003 12:13PM
User who most recently changed record MCBM
Since inspection or accident --
Event Location Runway Number and Location --
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --