# NTSB LAX08LA226: Jonsson Sonerai, N8050R, Hood River, OR, July 11, 2008 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: July 11, 2008, 11:30 local (18:30 UTC) - Place: Hood River, OR - Coordinates: 45.6725, -121.536392 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=45.6725&lon=-121.5364&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Defining event: [Enroute-cruise: Flight control sys malf/fail](https://openairdocs.org/ntsb-events/333) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report September 10, 2009 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 68440 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX08LA226 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/68440/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=68440 - Page: https://openairdocs.org/ntsb/LAX08LA226 ## Probable cause The pilot's failure to maintain directional control during the emergency landing roll with a tailwind. Contributing was the partial separation of the left aileron that prompted the pilot to attempt the emergency landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Jonsson Erik SONERAI, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=05615WX), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Wind: tailwind](https://openairdocs.org/ntsb-findings/03034015): Environmental issues › Conditions/weather/phenomena · Response/compensation (probable cause); cases with it: [Jonsson Erik SONERAI, 1 case](https://openairdocs.org/ntsb-findings/03034015/cases.md?model=05615WX), [All aircraft, 594 cases](https://openairdocs.org/ntsb-findings/03034015/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Jonsson Erik SONERAI, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05615WX), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Wing structure: ailerons](https://openairdocs.org/ntsb-findings/01035751): Aircraft › Aircraft structures · Damaged/degraded (probable cause); cases with it: [Jonsson Erik SONERAI, 1 case](https://openairdocs.org/ntsb-findings/01035751/cases.md?model=05615WX), [All aircraft, 12 cases](https://openairdocs.org/ntsb-findings/01035751/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Enroute-cruise: Flight control sys malf/fail](https://openairdocs.org/ntsb-events/333) (defining event); cases with it: [Jonsson Erik SONERAI, 1 case](https://openairdocs.org/ntsb-events/333/sequence.md?model=05615WX), [All aircraft, 410 cases](https://openairdocs.org/ntsb-events/333/sequence.md) - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230); cases with it: [Jonsson Erik SONERAI, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=05615WX), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Jonsson Erik SONERAI, 1 case](https://openairdocs.org/ntsb-events/300/sequence.md?model=05615WX), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Jonsson Erik SONERAI, 1 case](https://openairdocs.org/ntsb-events/096/sequence.md?model=05615WX), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot reported that the control stick unexpectedly began buffeting while the airplane was cruising at 3,500 feet mean sea level and 120 miles per hour, and he noticed that the left aileron was becoming detached at its outboard hinge. The pilot immediately flew toward a nearby airfield and conducted an emergency landing. The pilot said he observed that another airplane had previously landed in the opposite direction on the same runway, so to ensure adequate clearance from that airplane he landed on the right side of the runway. The pilot additionally reported that he "flew" his airplane onto the runway and landed with a tailwind at a faster than normal airspeed. During rollout, the airplane veered off the side of the runway, encountered an area of soft dirt, and nosed over. The pilot further reported that he observed that the outboard of three aileron hinges was separated from the wing. The pilot opined that the location of the hinges on the aileron may not have been adequate to support the aileron during flight. ## Factual narrative On July 11, 2008, about 1130 Pacific daylight time, an experimental Jonsson Sonerai, N8050R, nosed over during landing rollout at Ken Jernstedt Airfield, Hood River, Oregon. A private individual was operating the amateur built airplane under the provisions of 14 Code of Federal Regulations Part 91. The pilot held a private pilot certificate, and he was not injured. The airplane was substantially damaged. Visual meteorological conditions prevailed, and no flight plan had been filed. The personal flight departed Baker City Municipal Airport, Baker City, Oregon, about 1000. The pilot reported to the National Transportation Safety Board investigator that the control stick unexpectedly began buffeting while the airplane was cruising at 3,500 feet mean sea level and 120 miles per hour, and he noticed that the left aileron was becoming detached at its outboard hinge. The pilot immediately flew toward a nearby airfield and landed. According to the pilot, he observed that another airplane had previously landed in the opposite direction on the same runway, so to ensure adequate clearance from that airplane he landed on the right side of the runway. The pilot additionally reported that he "flew" his airplane onto the runway and landed with a tailwind at a faster than normal airspeed. During rollout, the airplane veered off the side of the runway, encountered an area of soft dirt, and nosed over. The pilot further reported to the Safety Board investigator that he subsequently examined his airplane. He observed that the outboard of three aileron hinges was separated from the wing. The pilot opined that the location of the hinges on the aileron may not have been adequate to support the aileron during flight. ## Aircraft - Registration: [N8050R](https://openairdocs.org/aircraft/N8050R), registered now, S/N EJ02 (OpenAirDocs) - Reported make and model: Jonsson Sonerai - Registry model: [Jonsson Erik SONERAI](https://openairdocs.org/model/jonsson-erik-sonerai) (registry code 05615WX) (OpenAirDocs) - Registry engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: EJ02 - Engines: Continental A&C65 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Departed: BKE, Baker City, OR - Destination: 4S2, Hood River, OR - Airport: 4S2, Ken Jernstedt Airfield, runway 25, 3,040 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 45; injuries: none; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, without waivers/limitations; seat: single; flight hours: 450 total, 6 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 50° at 11 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 79 °F, dew point 32 °F - Altimeter: 30.20 inHg - Observed at: CZK, 14 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 20080711839459A](https://openairdocs.org/incident/20080711839459A), Jul 11, 2008: Amtr SONERAI, Hood River, OR, Substantial damage. (-23) During descent for landig 5 miles from the runway the pilot experienced severe control stick buffeting. The pilot observed that the left hand aileron had… ## Docket (1 files) The files NTSB released with the investigation on July 21, 2009, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=68440. 50 KB in all. - Record of Conversation (item 1, .PDF, 50 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40316081&FileExtension=.PDF&FileName=Record%20of%20Conversation-Master.PDF 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.