# NTSB ERA17LA333: Buschmann/Vanzee Vari EZ, N830S, Ambler, PA, September 24, 2017 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: September 24, 2017, 17:15 local (21:15 UTC) - Place: Ambler, PA - Coordinates: 40.143333, -75.244445 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=40.1433&lon=-75.2444&mi=10 - Phase of flight: [Prior to flight](https://openairdocs.org/ntsb-phases/100) (OpenAirDocs' grouping) - Defining event: [Prior to flight: Fuel contamination](https://openairdocs.org/ntsb-events/193) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed, report April 20, 2020 - Report: Approved by Office Director - NTSB office: Eastern Region Aviation - Parties: Lycoming Engines, FAA/FSDO - NTSB case key (mKey): 96064 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA17LA333 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/96064/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=96064 - Page: https://openairdocs.org/ntsb/ERA17LA333 ## Probable cause Water contamination of the fuel that was not detected during a preflight inspection, which resulted in a total loss of engine power. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Fuel system: fuel storage](https://openairdocs.org/ntsb-findings/01022810): Aircraft › Aircraft systems · Damaged/degraded (probable cause); cases with it: [Buschmann/Vanzee VARI-EZ, 1 case](https://openairdocs.org/ntsb-findings/01022810/cases.md?model=056097F), [All aircraft, 60 cases](https://openairdocs.org/ntsb-findings/01022810/cases.md) - [Fluids: fuel](https://openairdocs.org/ntsb-findings/01071010): Aircraft › Fluids/misc hardware · Fluid condition (probable cause); cases with it: [Buschmann/Vanzee VARI-EZ, 1 case](https://openairdocs.org/ntsb-findings/01071010/cases.md?model=056097F), [All aircraft, 1,695 cases](https://openairdocs.org/ntsb-findings/01071010/cases.md) - [Inspection: preflight inspection](https://openairdocs.org/ntsb-findings/02061510): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Buschmann/Vanzee VARI-EZ, 1 case](https://openairdocs.org/ntsb-findings/02061510/cases.md?model=056097F), [All aircraft, 551 cases](https://openairdocs.org/ntsb-findings/02061510/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Prior to flight: Fuel contamination](https://openairdocs.org/ntsb-events/193) (defining event); cases with it: [Buschmann/Vanzee VARI-EZ, 1 case](https://openairdocs.org/ntsb-events/193/sequence.md?model=056097F), [All aircraft, 225 cases](https://openairdocs.org/ntsb-events/193/sequence.md) - [Initial climb: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341); cases with it: [Buschmann/Vanzee VARI-EZ, 1 case](https://openairdocs.org/ntsb-events/341/sequence.md?model=056097F), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) - [Initial climb: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Buschmann/Vanzee VARI-EZ, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=056097F), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The private pilot was conducting a personal flight in the experimental, amateur-built airplane. During the initial climb, the engine lost total power when the airplane was about 200 ft above ground level. The airplane descended and impacted trees beyond the departure threshold; the airplane was destroyed. A witness reported hearing the engine "sputter," and another witness reported that the engine sounded like it did not reach full rpm during takeoff. An engine examination revealed that the gascolator and carburetor contained water-contaminated fuel. The examination did not reveal any other preimpact mechanical malfunctions or anomalies that would have precluded normal operation. Due to his injuries, the pilot was unable to recall the events leading up to the accident. Although he indicated that he routinely completed thorough preflight inspections, he likely either did not sample the fuel or did not adequately eliminate water from the fuel before takeoff. Thus, it is likely that the loss of engine power was due to water contamination of the fuel. ## Factual narrative On September 24, 2017, about 1715 eastern daylight time, an experimental amateur-built Vari EZ, N830S, was destroyed when it impacted trees and terrain near Ambler, Pennsylvania. The private pilot sustained serious injuries. The airplane was registered to and operated by the pilot as a Title 14 Code of Federal Regulations Part 91 personal flight. Visual meteorological conditions prevailed at the time of the accident, and no flight plan was filed for the flight that departed Wings Field Airport (LOM), Blue Bell, Pennsylvania, just prior to the accident. According to a witness, during takeoff, the engine sounded like it did "not reach full rpm" and it took the entire 3,700-ft-long runway for the airplane to lift off the ground. Then, about 200 ft above ground level the engine "stopped." Another witness reported hearing the engine "sputter." The airplane was "wobbling," descended, and impacted trees prior to coming to rest near a house. Initial examination of the airplane by a Federal Aviation Administration inspector revealed that both fuel tanks were ruptured, and fuel was leaking from the wings. The canopy was separated from the fuselage and the forward section of the fuselage exhibited crush damage. The engine remained attached to the airframe and the propeller remained attached to the engine. According to FAA records, the airplane was manufactured in 1984 and registered the pilot in May 2017. It was equipped with a Lycoming O-235-C series, 100-horsepower engine that drove a Sensenich propeller. According to airplane maintenance logbooks, the most recent condition inspection was completed on April 1, 2017, at 691.0 total aircraft hours. The engine was removed from the airframe to facilitate further examination. The rocker box covers were removed, and rocker arm movement was noted on all cylinders when the propeller was rotated by hand. Compression and suction were noted on all cylinders. All spark plugs were removed and exhibited normal wear when compared to the Champion Check-A-Plug chart. The magneto was removed, operated, and spark was noted on all towers. Corrosion was noted throughout the engine. It was noted at the crankshaft end of the No. 2 connecting rod and all gears in the accessory section of the engine. The gascolator was removed and water was noted in the fuel. Also, debris was noted in the fuel that restricted the flow of fluid from the gascolator. The carburetor was removed and disassembled. Water was noted in the carburetor when tested with water finding paste. The left fuel tank fuel cap was impact separated and the tank was breached. The debris noted in the fuel was consistent with a substance that was dried on the interior of the left fuel tank. The right fuel tank contained fuel and tested negative for water. When water was poured over the right fuel tank cap while it was seated, then the cap was removed, the fuel in the right tank tested positive for water with water finding paste. According to the pilot, as a result ofhis injuries from the accident, he was unable to recall any of the events leading up to the accident. However, he stated that it was routine practice for him to complete a thorough preflight inspection and does not believe there would be a reason that a thorough preflight was not completed on the day of the accident. He also stated that the airplane was kept outside. ## Aircraft - Registration: [N830S](https://openairdocs.org/deregistered/N830S-2020-10-03), registration cancelled 2020-10-03, S/N 2069, built 1984 (OpenAirDocs) - Reported make and model: BUSCHMANN/VANZEE VARI EZ - Registry model: [Buschmann/Vanzee VARI-EZ](https://openairdocs.org/model/buschmann-vanzee-vari-ez) (registry code 056097F) (OpenAirDocs) - Registry engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505, 4 cycle) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 2069 - Year built: 1984 - Airframe hours: 691 - Engines: LYCOMING O-235-C 100 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, April 1, 2017 - Departed: LOM, Blue Bell, PA - Airport: LOM, Wings Field Airport, runway 06, 3,700 × 75 ft, asphalt - Equipment: Unknown ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 29; injuries: serious; private; airplane ratings: single-engine land; medical: class 3 ## Weather - Conditions: Visual (VMC), Day - Wind: 50° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 86 °F, dew point 64 °F - Altimeter: 30.04 inHg - Observed at: LOM, 3 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 20170924019839A](https://openairdocs.org/incident/20170924019839A), Sep 24, 2017: Buschmann/Vanzee VARI-EZ, Whitpain Townsh, PA, Substantial damage. Aircraft departed runway 6 at wings field (lom) and experienced problems while on climb out, with possible loss of engine power. Aircraft crashed into the side… ## Docket (10 files) The files NTSB released with the investigation on November 4, 2019, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=96064. 7.3 MB in all. - Pilot's Statement (item 1, .PDF, 48 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477702&FileExtension=.PDF&FileName=Pilot%27s%20Statement-Master.PDF - Witness Statements (item 2, .PDF, 922 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477703&FileExtension=.PDF&FileName=Witness%20Statements-Master.PDF - Fuel Receipt (item 3, .PDF, 101 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477704&FileExtension=.PDF&FileName=Fuel%20Receipt-Master.PDF - Memorandum of Record - FAA Inspector (item 4, .PDF, 127 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477705&FileExtension=.PDF&FileName=Memorandum%20of%20Record%20-%20FAA%20Inspector-Master.PDF - Maintenance Logbook Excerpts (item 5, .PDF, 3.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477706&FileExtension=.PDF&FileName=Maintenance%20Logbook%20Excerpts-Master.PDF - Weather Observations (item 6, .PDF, 195 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477707&FileExtension=.PDF&FileName=Weather%20Observations-Master.PDF - Investigative Photographs (item 7, .PDF, 6 photos, 1.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477708&FileExtension=.PDF&FileName=Investigative%20Photographs-Master.PDF - Memorandum for Record - Engine Examination (item 8, .PDF, 135 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477709&FileExtension=.PDF&FileName=Memorandum%20for%20Record%20-%20Engine%20Examination-Master.PDF - Wreckage Release (item 9, .PDF, 303 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477710&FileExtension=.PDF&FileName=Wreckage%20Release-Master.PDF - Statement of Party Representatives to NTSB Investigation (item 10, .PDF, 361 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40477711&FileExtension=.PDF&FileName=Statement%20of%20Party%20Representatives%20to%20NTSB%20Investigation-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.