# NTSB SEA04LA134: Cessna 150C, N7815Z, Mazama, WA, August 1, 2004 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: August 1, 2004, 14:30 local (21:30 UTC) - Place: Mazama, WA - Coordinates: 48.649444, -120.501945 - Nearby events: https://openairdocs.org/map.md?lat=48.6494&lon=-120.5019&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious, 1 minor - Status: Completed, report October 28, 2004 - Report: Approved by Office Director - Parties: FAA, Spokane FSDO - NTSB case key (mKey): 59801 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA04LA134 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/59801/pdf - Page: https://openairdocs.org/ntsb/SEA04LA134 ## Probable cause The pilot's inadequate compensation for the weather conditions and his failure to maintain the initial takeoff climb, which resulted in a collision with trees during an emergency landing. Contributing factors were the unfavorable wind and high density altitude weather conditions. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight encounter with weather, takeoff - initial climb - weather condition - high density altitude (contributing factor) - compensation for wind conditions - inadequate, pilot in command (cause) - weather condition - unfavorable wind (contributing factor) - climb - not maintained, pilot in command (cause) - precautionary landing - initiated, pilot in command - On ground/water collision with object, emergency landing - object - tree(s) ## Analysis The pilot stated that he noted no problems with the airplane during the preflight inspection and the engine runup. After liftoff on runway 29, the airplane climbed to treetop level, at which point a gust of wind pushed the airplane left toward trees bordering the runway. The pilot had to bank the airplane to avoid the trees, and the airplane stopped climbing. After "barely clearing" the trees at the end of the runway, the pilot elected to put the airplane back on the ground as he was concerned the airplane might not clear trees located further ahead. He selected a streambed as an emergency landing site. During the emergency landing, the airplane contacted trees along the edge of the streambed. The pilot reported that the temperature was 88 degrees F and the winds were from 300 degrees at 3 knots. The airport elevation was 2,415 feet, and the density altitude was calculated to be approximately 5,000 feet. ## Factual narrative On August 1, 2004, approximately 1430 Pacific daylight time, a Cessna 150C, N7815Z, lost altitude and struck trees during the initial takeoff climb from the Lost River Resort Airport, Mazama, Washington. The airplane sustained substantial damage, the private pilot received serious injuries, and the passenger received minor injuries. The airplane was being operated by the pilot under the provisions of Title 14, CFR Part 91 when the accident occurred. Visual meteorological conditions prevailed, and no flight plan was filed. The flight was originating at the time of the accident with an intended destination of Arlington Municipal Airport, Arlington, Washington. According to a report prepared by a deputy with the Okanogan County Sheriff's Office, who responded to the accident site, the pilot told the deputy that he was taking off in the airplane on runway 29 and "could not get lift and clear the trees at the end of the runway." The deputy reported that he did not see any indication the airplane hit the trees located at the end of the runway, but actually cleared those trees, then descended, contacted the ground and slid about 40 feet into another group of trees. The airplane came to rest about 150 yards from the departure end of the runway. The deputy reported that the temperature was 92 degrees Fahrenheit (F), the humidity was 23%, and the wind was from the north at about 6 mph. In a telephone interview conducted by the NTSB investigator-in-charge on August 3, 2004, the pilot stated that he noted no problems with the airplane during the preflight inspection and the engine runup. After liftoff, the airplane climbed to treetop level, at which point a gust of wind pushed the airplane left towards the trees bordering the runway. The pilot had to bank the airplane to avoid the trees, and the airplane stopped climbing. After "barely clearing" the trees at the end of the runway, the pilot elected to put the airplane back on the ground as he was concerned the airplane might not clear trees located further ahead. He selected a streambed as an emergency landing site. During the emergency landing, the airplane contacted trees along the edge of the streambed. The pilot reported that the temperature was 88 degrees F and the winds were from 300 degrees at 3 knots. The pilot did not recall the current altimeter setting. At 1453, the nearest weather reporting station, located at Omak, Washington approximately 41 nautical miles east of the accident site, reported an altimeter setting of 29.74 inches. Using the airport elevation of 2,415 feet, a temperature of 88 degrees F, and an altimeter setting of 29.74 inches, the density altitude was calculated as 5,048 feet. ## Aircraft - Registration: [N7815Z](https://openairdocs.org/deregistered/N7815Z-2007-05-02), registration cancelled 2007-05-02, S/N 15059915, built 1963 (OpenAirDocs) - Reported make and model: Cessna 150C - Registry model: [Cessna 150C](https://openairdocs.org/model/cessna-150c) (registry code 2071808) (OpenAirDocs) - Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 15059915 - Airframe hours: 6293 - Engines: Continental O-200A 100 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Departed: W12, Mazama, WA - Destination: AWO, Arlington, WA - Airport: W12, Lost River Resort, runway 29, 3,150 × 85 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 38; injuries: serious; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; last flight review August 11, 2003; seat: left; flight hours: 174 total, 122 in this make and model, 114 as pilot in command, 14 in the last 90 days, 7 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 300° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 88 °F ## 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 20040801018789A](https://openairdocs.org/incident/20040801018789A), Aug 1, 2004: Cessna 150C, Mazama, WA, Substantial damage. (-23) Aircraft departed lost river airport, a gravel-strip at 2415 feet elevation, and length of 3150 feet. Temperature was reported to be 92 degrees, with 23%… 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.