# NTSB CHI04CA172: Cessna 310P, N310WH, Knox, IN, July 2, 2004 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: July 1, 2004, 20:30 local (Jul 2, 2004, 02:30 UTC) - Place: Knox, IN - Coordinates: 41.330276, -86.664718 - Nearby events: https://openairdocs.org/map.md?lat=41.3303&lon=-86.6647&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report September 29, 2004 - Report: Approved by Office Director - NTSB case key (mKey): 59689 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI04CA172 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/59689/pdf - Page: https://openairdocs.org/ntsb/CHI04CA172 ## Probable cause The fatigue fracture of the main landing gear assembly. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, landing - flare/touchdown - landing gear,main gear - fatigue (cause) - Gear collapsed, landing - flare/touchdown - On ground/water encounter with terrain/water, landing - flare/touchdown ## Analysis The airplane impacted terrain when the right main landing gear collapsed upon landing touchdown. Examination of the right landing gear revealed that the brace assembly - right hand side, part number 5041000-46, was fractured. The fracture surface displayed multiple initiations at the edge of the slot and an oxidized area with a distinct terminus, features consistent with fatigue. ## Factual narrative On July 1, 2004., at 2030 central daylight time, a Cessna 310P, N310WH, piloted by a commercial pilot, received substantial damage on impact with terrain when the right main landing gear collapsed during touchdown on runway 36 (4,400 feet by 50 feet, asphalt) at Starke County Airport (OX1), Knox, Indiana. Visual meteorological conditions prevailed at the time of the accident. The 14 CFR Part 91 personal flight was operating on an instrument rules flight plan. The commercial pilot was uninjured. The flight originated from Evansville Regional Airport, Evansville, Indiana, at 1900, and was en route to OX1. The pilot stated that he was five miles from OX1 when he extended the landing gear, and the right main landing gear position indicator light did not illuminate. He then recycled the landing gear and obtained three green landing gear position indicator lights. He also heard the down locks snap into place. Upon touch down, the landing gear warning horn annunciated and he right main landing gear position indicator light extinguished. The landing gear collapsed and the airplane then impacted a birm on the right side of the runway. The 1969 Cessna 310P, serial number 310P0204, airplane was registered to the pilot. The airplane was last inspected during annual inspection on December 14, 2003, at a total time in service of 5,739 hours. The pilot stated that the airplane accumulated an additional 48 hours of time after the of the annual inspection. The number of cycles was unknown. Examination of the right landing gear revealed that the brace assembly - right hand side, part number 5041000-46, was fractured. The fracture surface displayed multiple initiations at the edge of the slot and an oxidized area with a distinct terminus, features consistent with fatigue. ## Aircraft - Registration: [N310WH](https://openairdocs.org/deregistered/N310WH-2005-06-17), registration cancelled 2005-06-17, S/N 310P0204, built 1969 (OpenAirDocs) - Reported make and model: Cessna 310P - Registry model: [Cessna 310P](https://openairdocs.org/model/cessna-310p) (registry code 2074238) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 310P0204 - Engines: Continental IO-470 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Kevin King - Airworthiness certificate: Standard, Normal - Departed: EVV, Evansville, IN - Destination: OXI, Knox, IN - Flight plan: IFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 57; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2; flight hours: 1,721 total, 1,206 in this make and model, 40 in the last 90 days, 20 in the last 30 days ## Weather - Conditions: Visual (VMC), Dusk ## 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 20040701013419A](https://openairdocs.org/incident/20040701013419A), Jul 1, 2004: Cessna 310P, Knox, IN, Substantial damage. (-23) Right main gear collapsed upon landing on RW36 at oxi (Knox) airport. Investigation revealed that rt main gear down lock assembly failed at upper attach… 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.