# NTSB SEA07LA001: Oneil Oneil Glassair II-S, N204BL, Richland, WA, October 1, 2006 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: October 1, 2006, 13:20 local (20:20 UTC) - Place: Richland, WA - Coordinates: 46.305557, -119.304168 - Nearby events: https://openairdocs.org/map.md?lat=46.3056&lon=-119.3042&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor, 1 uninjured - Status: Completed, report February 26, 2007 - Report: Approved by Office Director - Parties: Spokane, Washington - NTSB case key (mKey): 64629 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA07LA001 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/64629/pdf - Page: https://openairdocs.org/ntsb/SEA07LA001 ## Probable cause Loss of partial engine power for undetermined reasons during the initial climb after takeoff. Trees were a factor during the landing roll. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(partial) - nonmechanical, takeoff - initial climb - reason for occurrence undetermined (cause) - Forced landing, emergency landing after takeoff - On ground/water collision with object, emergency landing - object - tree(s) (contributing factor) ## Analysis After takeoff and reaching an altitude of 1,000 feet above the ground, the engine surged and a reduction of power was observed; attempts to restore engine power were unsuccessful. The pilot decided to attempt a return to the airport; however, he elected to land in an adjacent field after determining he would not be able to make the runway. Subsequent impact with trees resulted in substantial damage to the airplane. A post-accident engine run did not reveal any anomalies which would have precluded normal operations. The reason for the partial loss of power could not be determined. ## Factual narrative On October 1, 2006, about 1320 Pacific daylight time, an Oneil Glassair II-S experimental amateur-built airplane, N204BL, sustained substantial damage following a loss of engine power and impact with terrain near the Richland Airport, Richland, Washington. The airplane was registered to and operated by a private individual. The commercial pilot was not injured, and his sole passenger received minor injuries. Visual meteorological conditions existed for the personal flight, which was conducted in accordance with 14 CFR Part 91, and no flight plan was filed. The local flight was originating at the time of the accident. According to the Pilot/Operator Aircraft Accident/Incident Report (NTSB Form 6120.1), and in telephone conversations with the NTSB investigator-in-charge (IIC), the pilot reported that after taking off and maintaining climb power until reaching 1,000 feet above ground level (agl), "...I reached for the throttle lever to reduce power to cruise climb, but the engine power surged down 20 per cent." The pilot stated that he then started a shallow left turn back to the airport, and after making a 180-degree turn noted that his airspeed had slowed to 100 miles per hour. The pilot reported that when he was about 1 mile from the runway at an altitude of 600 feet agl, he made the decision that he could not make it back to the runway. The pilot stated that he continued to turn to the 270-degree point in an attempt to land in a farm field, which was about one-quarter mile away. The pilot further stated that at about 100 feet agl he looked at the surface, and believing it was flat enough, lowered the landing gear. The pilot reported that he cleared the trees bordering the field on the east, landed, and then rolled approximately 1,000 feet before maneuvering to avoid a tree line on the west side of the field. The pilot further stated that after impacting two trees the airplane came to rest in the middle of a gravel road. The pilot reported that damage to the airplane included the nose gear and right main landing gear collapsing, aft crushing to the right wing spar, and the fuselage being bent and buckled. There was no post-crash fire. The pilot reported to the IIC that there were no anomalies noted with the airplane prior to the flight. During a post-accident examination of the engine by a certified Federal Aviation Administration airframe and powerplant mechanic, the mechanic reported that no anomalies were noted which would have precluded normal operations. After the removal of the original propeller and the installation of an exemplar propeller, the engine was started and operated at 1,000, 1,500, and 1,800 revolutions per minute, with all indications reported as normal. The reason for the partial loss of engine power could not be determined. ## Aircraft - Registration: [N204BL](https://openairdocs.org/deregistered/N204BL-2007-02-05), registration cancelled 2007-02-05, S/N WJO-2, built 2001 (OpenAirDocs) - Reported make and model: Oneil Oneil Glassair II-S - Registry model: [Oneil William J GLASAIR II-S](https://openairdocs.org/model/oneil-william-j-glasair-ii-s) (registry code 05626FN) (OpenAirDocs) - Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: WJO-2 - Airframe hours: 155 - Engines: Lycoming IO-360 200 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: William J. Oneil - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, May 1, 2002, 20 hours before - Departed: RLD, Richand, WA - Destination: RLD, Richand, WA - Airport: RLD, Richland Airport, runway 19, 4,009 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 43; injuries: none; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; seat: right; flight hours: 633 total, 155 in this make and model, 558 as pilot in command, 14 in the last 90 days, 3 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 72 °F, dew point 41 °F - Altimeter: 29.88 inHg - Observed at: PAC, 7 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 20061001020589A](https://openairdocs.org/incident/20061001020589A), Oct 1, 2006: Amtr GLASAIRIIS, Richland, WA, Substantial damage. (-23) Aircraft departed Richland runway 19. At takeoff power at 1000' AGL the engine shuttered slightly, then slowly lost power to approximately 25% power.… 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.