Aircraft Accident/Incident Report

Laramie, Wyoming 82212
Thursday, August 21, 2003 11:10 MDT

NTSB Narrative Summary Released at Completion of Accident

According to the pilot, the airplane was in cruise flight at 10,500 feet when the engine began to run "rough." The power dropped below 2,000 rpm, and the pilot's effort was unsuccessful in restoring power. The pilot made a forced landing in mountainous terrain. The airplane struck several trees, substantially damaging both wings. Density altitude was calculated to be 10,312 feet msl. The engine was later functionally tested to 2,475 rpm. No anomalies were found.

NTSB Probable Cause Narrative

A partial loss of engine power for undetermined reasons. Contributing factors were the high density altitude, trees, mountainous terrain, and unsuitable terrain on which to make a forced landing.

Event Information

Type of Event Accident
Event Date 8/21/2003
Event Day of the Week Thursday
Time of Event 1110
Event Time Zone Mountain Daylight Time
Event City Laramie
Event State WYOMING
Event Country --
Zipcode of the event site 82212
Event Date Year 2003
Event Date Month 8
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 412413N
Event Location Longitude 1062133W
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 Not pertinent
Investigator's weather source Weather Observation Facility
Time of the weather observation 1156 Mountain Daylight Time
Direction of event from weather observation facility (degrees) 280
Weather Observation Facility ID LAR
Elevation of weather observation facility 7278
Distance of event from weather observation facility (units?) 32
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) 28
Dew Point at event time (in degress fahrenheit) 6
Wind Direction (degrees magnetic) 170
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 11
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.36
Density Altitude (feet) 10312
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) 14890
NTSB Notification Source FAA COMM CTR
NTSB Notification Date Aug 21 2003 12:00AM
NTSB Notification Time 1216
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Mar 2 2004 8:07AM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office Casper FSFO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N8065F
NTSB Number DEN03LA146
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? No
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Cessna
Aircraft Model 150F
Aircraft Series Identifier --
Aircraft Serial Number 15064165
Certified Max Gross Weight 1600
Aircraft Category Airplane
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 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Jul 18 2003 12:00AM
Airframe hours since last inspection 29
Airframe Hours 5325
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site Yes
ELT Type --
Aircraft Owner Name Gordon L. Hyde II
Aircraft Owner Street Address On File
Aircraft Owner City Mesa
Aircraft Owner State AZ
Aircraft Owner Country USA
Aircraft Owner Zipcode 85213
Operator is an individual? No
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 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) Personal
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code BTF
Departure City Bountiful
Departure State UT
Departure Country USA
Departure Time 800
Departure Time Zone MDT
Destination Same as Local Flt --
Destination Airport Code LAR
Destination City Laramie
Destination State WY
Destination Country USA
Specific Phase of Flight Cruise - normal
Report sent to ICAO? No
Evacuation occurred --
Date of most recent change to record Dec 22 2003 3:20PM
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 --