# NTSB WPR12LA146: Jacobs RV-6A, N238RV, Bow, WA, March 24, 2012 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: March 24, 2012, 15:30 local (22:30 UTC) - Place: Bow, WA - Coordinates: 48.546943, -122.409164 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=48.5469&lon=-122.4092&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Defining event: [Enroute-climb to cruise: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report February 27, 2013 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 83227 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR12LA146 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/83227/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=83227 - Page: https://openairdocs.org/ntsb/WPR12LA146 ## Probable cause The total loss of engine power due to fuel starvation as a result of the pilot’s mismanagement of the fuel supply. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Planning/preparation: fuel planning](https://openairdocs.org/ntsb-findings/02061030): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Jacobs Richard RV6A, 1 case](https://openairdocs.org/ntsb-findings/02061030/cases.md?model=056069P), [All aircraft, 719 cases](https://openairdocs.org/ntsb-findings/02061030/cases.md) - [Fluids: fuel](https://openairdocs.org/ntsb-findings/01071010): Aircraft › Fluids/misc hardware · Fluid management (probable cause); cases with it: [Jacobs Richard RV6A, 1 case](https://openairdocs.org/ntsb-findings/01071010/cases.md?model=056069P), [All aircraft, 1,695 cases](https://openairdocs.org/ntsb-findings/01071010/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Enroute-climb to cruise: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [Jacobs Richard RV6A, 1 case](https://openairdocs.org/ntsb-events/341/sequence.md?model=056069P), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) - [Enroute-climb to cruise: Fuel starvation](https://openairdocs.org/ntsb-events/191); cases with it: [Jacobs Richard RV6A, 1 case](https://openairdocs.org/ntsb-events/191/sequence.md?model=056069P), [All aircraft, 733 cases](https://openairdocs.org/ntsb-events/191/sequence.md) - [Emergency descent: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Jacobs Richard RV6A, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=056069P), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) - [Emergency descent: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Jacobs Richard RV6A, 1 case](https://openairdocs.org/ntsb-events/440/sequence.md?model=056069P), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) ## Analysis The pilot performed two touch-and-go landings then departed to his destination airport. As the airplane climbed through 2,300 feet mean sea level, the pilot heard a loud "clunk." The engine experienced a total loss of power, and the airplane began to descend. The pilot maneuvered the airplane to a field in an effort to perform an off-airport, emergency landing. Prior to touchdown, the landing gear collided with a barbed wire fence and the airplane nosed over. During the wreckage recovery, the right fuel tank was found empty and the left tank contained about 22 gallons of aviation fuel. The pilot reported that he believed that the fuel selector was positioned on the left tank at the time of the loss of power. He did not attempt to restart the engine following the loss of power due to the airplane's low altitude. At the time of the airframe examination, the fuel selector was found in the off position. A postaccident examination of the engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. It is likely that the fuel selector was in fact positioned to the empty fuel tank and the reason for the loss of engine power was due to fuel starvation. ## Factual narrative HISTORY OF FLIGHT On March 24, 2012, about 1530 Pacific daylight time, a Jacobs RV-6A, N238RV, experienced a loss of engine power near Bow, Washington. The owner was operating the airplane under the provisions of 14 Code of Federal Regulations (CFR) Part 91. The private pilot, the sole occupant, was not injured; the airplane was substantially damaged. The local personal flight departed from Skagit Regional Airport, Burlington, Washington, about 1510, with a planned destination of Bellingham International Airport, Bellingham, Washington. Visual meteorological conditions prevailed and no flight plan had been filed. In a telephone conversation with a National Transportation Safety Board investigator, the pilot reported that he performed two touch-and-go practice takeoffs and landings at Skagit and then departed en route to Bellingham. As the airplane climbed through 2,300 feet mean sea level (msl) to the pilot's planned altitude of 3,000 feet, he heard a loud "clunk." The engine experienced a total loss of power and the airplane began to descend. The pilot maneuvered the airplane to a field in an effort to perform an off-airport, emergency landing. While landing, the airplane's landing gear collided with a barbed wire fence and nosed over. The pilot further stated that just prior to the accident he noted that the right fuel tank was empty and the left tank was about ¾ full. He believed that the fuel selector was positioned on the left tank. He did not attempt to restart the engine following the loss of power due to the airplane's low altitude. TESTS AND RESEARCH Maintenance personnel reported that prior to transporting the wreckage to the storage facility they had removed approximately 22 gallons of fuel from the left fuel tank and less than a cup from the right fuel tank. During the wreckage examination both fuel tanks were empty and there was no evidence of a fuel system breach or staining that would indicate fuel leakage. The fuel selector was found in the forward “off” position. Air was blown from the fuel selector inlet tubes and flow continuity was established to the wing root fuel lines that connect to the right and left fuel tanks. A small amount of fuel exited the line at both wing roots. Air was also blown from the fuel selector to the carburetor and continuity was confirmed. The gascolator bowl was removed from its attachment point; it was full of a blue liquid consistent with 100LL fuel. The gascolator screen was clear of debris. The airplane was equipped with a Lycoming O-360 engine. The engine remained attached to the engine mount assembly and firewall with minimal damage noted. Examination of the engine revealed that the engine case and all four cylinders were intact. The accessory gear case and associated accessories were present and there was no evidence of oil leakage. The engine oil sump was intact and contained about 6.25 quarts of oil. The spark plug ignition leads and the top four spark plugs were removed from the engine. Theleads were intact and undamaged. The spark plug electrodes were dry and grey in color. As compared to the Champion Check-A-Plug comparison card, the top spark plugs displayed normal operating wear signatures. The engine crankshaft was manually rotated via rotation of the propeller and all four cylinders developed thumb compression. The ignition leads for the top four spark plugs sparked normally when the crankshaft was manually rotated. During the post accident examination, no evidence of mechanical malfunction or failure with the airplane was found. A complete examination report is contained in the public docket for this accident. ## Aircraft - Registration: [N238RV](https://openairdocs.org/aircraft/N238RV), registered now, S/N 23880 (OpenAirDocs) - Reported make and model: JACOBS RV-6A - Registry model: [Jacobs Richard RV6A](https://openairdocs.org/model/jacobs-richard-rv6a) (registry code 056069P) (OpenAirDocs) - Registry engine: [Lycoming 0-360-A1D](https://openairdocs.org/engine/lycoming-0-360-a1d) (registry code 41504, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 23880 - Airframe hours: 682 - Engines: Lycoming O-360-Exp 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, January 13, 2012 - Departed: BVS, Burlington, WA - Destination: BLI, Bellingham, WA ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 62; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review September 9, 2012; seat: left; flight hours: 302 total, 25 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 310° at 10 knots - Visibility: 9 statute miles - Lowest ceiling: none - Temperature: 52 °F, dew point 39 °F - Altimeter: 29.94 inHg - Observed at: BVS, 8 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 20120324004659A](https://openairdocs.org/incident/20120324004659A), Mar 24, 2012: Jacobs Richard RV6A, Bow, WA, Substantial damage. Pilot stated that he had been flying for approximately 2 hours on the day of the accident. After doing several touch and go landings at a nearby airport, the… ## Docket (3 files) The files NTSB released with the investigation on January 16, 2013, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=83227. 4.2 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 3.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40377831&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Engine Examination Field Notes (item 2, .PDF, 6 photos, 387 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40377832&FileExtension=.PDF&FileName=Engine%20Examination%20Field%20Notes-Master.PDF - Pilot Statement (item 3, .PDF, 179 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40382554&FileExtension=.PDF&FileName=Pilot%20Statement-Redacted.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.