# NTSB DEN03LA146: Cessna 150F, N8065F, Laramie, WY, August 21, 2003 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: August 21, 2003, 11:10 local (17:10 UTC) - Place: Laramie, WY - Coordinates: 41.40361, -106.359169 - Nearby events: https://openairdocs.org/map.md?lat=41.4036&lon=-106.3592&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report March 2, 2004 - Report: Approved by Office Director - Parties: FAA Flight Standards District Office - NTSB case key (mKey): 57746 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN03LA146 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/57746/pdf - Page: https://openairdocs.org/ntsb/DEN03LA146 ## Probable cause 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. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(partial) - nonmechanical, cruise - normal - reason for occurrence undetermined (cause) - weather condition - high density altitude (contributing factor) - Forced landing, descent - emergency - In flight collision with object, emergency landing - object - tree(s) (contributing factor) - terrain condition - mountainous/hilly (contributing factor) - terrain condition - none suitable (contributing factor) ## Analysis 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. ## Factual narrative On August 21, 2003, approximately 1110 mountain daylight time, a Cessna 150F, N8065F, registered to and operated by the pilot, was substantially damaged when it impacted trees during a forced landing 30 miles west of Laramie, Wyoming. The private pilot, the sole occupant on board, was not injured. Visual meteorological conditions prevailed, and no flight plan had been filed for the cross-country flight being conducted under Title 14 CFR Part 91. The flight originated at Skypark Airport, Bountiful, Utah, approximately 0800. According to the pilot, he was in cruise flight at 10,500 feet when the engine began running "rough." Power dropped below 2,000 rpm. He tried but was unable to restore full power, and made a forced landing in mountainous terrain. The airplane struck several trees, destroying both wings and bending the main spar. Density altitude at Laramie was calculated to be 10,312 feet msl. On September 24, 2003, the engine was functionally tested to 2,475 rpm. The magnetos were tested and functioned normally. No mechanical anomalies were noted. ## Aircraft - Registration: [N8065F](https://openairdocs.org/deregistered/N8065F-2017-07-06), registration cancelled 2017-07-06, S/N 15064165, built 1966 (OpenAirDocs) - Reported make and model: Cessna 150F - Registry model: [Cessna 150F](https://openairdocs.org/model/cessna-150f) (registry code 2071814) (OpenAirDocs) - Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 15064165 - Airframe hours: 5325 - Engines: Continental O-200-A 100 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Gordon L. Hyde II - Airworthiness certificate: Standard, Utility - Last inspection: Annual, July 18, 2003, 29 hours before - Departed: BTF, Bountiful, UT - Destination: LAR, Laramie, WY ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 29; injuries: none; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; last flight review August 28, 2002; seat: left; flight hours: 600 total, 30 in this make and model, 450 as pilot in command, 75 in the last 90 days, 25 in the last 30 days, 4 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 170° at 11 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 82 °F, dew point 43 °F - Altimeter: 30.36 inHg - Observed at: LAR, 32 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20030821020339A](https://openairdocs.org/incident/20030821020339A), Aug 21, 2003: Cessna 150F, Laramie, WY, Substantial damage. (-23) While on a cross country flight from sandy, ut at 10,500 feet, the pilot reported that the engine lost power up approximately 30 miles west of the… ## Other investigations on N8065F (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB CHI67F0334](https://openairdocs.org/ntsb/CHI67F0334), Oct 2, 1966: Cessna 150 (N8065F), Northbrook, IL, substantial damage From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.