# NTSB SEA02LA010: Fetherolf Hatz CB-1, N26WF, Ontario, OR, November 2, 2001 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: November 2, 2001, 14:00 local (21:00 UTC) - Place: Ontario, OR - Coordinates: 44.079162, -117.010757 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=44.0792&lon=-117.0108&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report June 18, 2002 - Report: Approved by Office Director - Parties: FAA - Boise FSDO - NTSB case key (mKey): 53716 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA02LA010 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/53716/pdf - Page: https://openairdocs.org/ntsb/SEA02LA010 ## Probable cause An improper weld in the landing gear, resulting in separation of the right main landing gear wheel during a normal landing. ## Analysis The experimental-category amateur-built airplane suffered a broken weld in the right main landing gear during landing, resulting in a separation of the right main gear tire. The pilot reported that he landed to the north (runway 32) on a 4,529- by 100-foot hard-surface runway. He reported that he touched down with a light bounce. He stated that while rolling, there was suddenly a violent pull to the right after hearing a "crunch." The pilot reported that he applied left brake but that the plane left the runway to the right, went into the dirt and up onto its nose and upper left wingtip. He reported that the aircraft, including the failed part, had 17.4 hours total time. The pilot, who had built the aircraft, listed "better construction [technique] by builder" as an owner/operator safety recommendation on his NTSB accident report. ## Factual narrative On November 2, 2001, approximately 1400 mountain standard time, a Fetherolf Hatz CB-1 experimental-category amateur-built airplane, N26WF, suffered a broken weld in the right main landing gear during landing at Ontario, Oregon, resulting in a separation of the right main gear tire. The airplane subsequently departed the side of the landing runway and nosed down, receiving substantial damage. The private pilot-in-command of the aircraft, who owned and had built the airplane and was its sole occupant, was not injured in the accident. Visual meteorological conditions with light and variable winds prevailed and no flight plan had been filed for the 14 CFR 91 personal flight from Nampa, Idaho. The pilot reported that he landed to the north (runway 32) on a 4,529- by 100-foot hard-surface runway. He reported that he touched down with a light bounce. He stated that while rolling, there was suddenly a violent pull to the right after hearing a "crunch." The pilot reported that he applied left brake but that the plane left the runway to the right, went into the dirt and up onto its nose and upper left wingtip. He reported that the airplane, including the part that suffered the broken weld, had 17.4 hours total time. The pilot listed "better construction [technique] by builder" as an owner/operator safety recommendation on his NTSB accident report. The pilot, who also held a repairman/experimental aircraft builder certificate for the accident aircraft, indicated on his NTSB accident report that the aircraft's last inspection was a continuous airworthiness inspection performed on August 3, 1995, 17.4 flight hours before the accident. A copy of the aircraft's engine log furnished by the pilot contained an entry dated September 15, 2001, for a "conditional inspection" signed by the pilot. The pilot did not furnish a copy of the aircraft log. According to the FAA aircraft registry, the accident aircraft received an experimental/amateur-built airworthiness certificate on April 22, 1999. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, landing - landing gear - improper/poor weld (cause) - landing gear,wheel - separation - Loss of control - on ground/water, landing - Nose down, landing ## Aircraft - Registration: [N26WF](https://openairdocs.org/deregistered/N26WF-2005-03-22), registration cancelled 2005-03-22, S/N CB-1-222, built 1999 (OpenAirDocs) - Reported make and model: Fetherolf Hatz CB-1 - Registry model: [Fetherolf Will CB-1](https://openairdocs.org/model/fetherolf-will-cb-1) (registry code 05606K4) (OpenAirDocs) - Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: CB-1 222 - Airframe hours: 17.4 - Engines: Lycoming O-290-D 125 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Departed: S67, Nampa, ID - Destination: ONO, Ontario, OR - Airport: ONO, Ontario Muni, runway 32, 4,529 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 60; injuries: none; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; last flight review September 5, 2000; seat: rear; flight hours: 132 total, 20 in this make and model, 132 as pilot in command, 5 in the last 90 days ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 63 °F, dew point 43 °F - Altimeter: 30.19 inHg - Observed at: ONO ## 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 20011102029929A](https://openairdocs.org/incident/20011102029929A), Nov 2, 2001: Ontario, OR, No damage. (-23) Aircraft was built by pilot as a homebuilt kit. On landing, a weld on the landing gear broke and the right wheel detached from the frame. This caused the… 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.