# NTSB WPR12LA047: Cessna 310I, N8059M, Sedona, AZ, November 25, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: November 25, 2011, 09:00 local (16:00 UTC) - Place: Sedona, AZ - Coordinates: 34.848331, -111.78778 - Nearby events: https://openairdocs.org/map.md?lat=34.8483&lon=-111.7878&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report November 7, 2012 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: FAA FSDO - NTSB case key (mKey): 82382 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR12LA047 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/82382/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=82382 - Page: https://openairdocs.org/ntsb/WPR12LA047 ## Probable cause The collapse of the right main landing gear after landing for a reason that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation, and postaccident testing could not be performed due to damage. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Cessna 310I, 4 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=2074224), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) (defining event); cases with it: [Cessna 310I, 3 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2074224), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The pilot reported that he entered the traffic pattern and completed the before landing checklist, including lowering the flaps and landing gear. He further reported that there were no anomalies, and the landing was uneventful until the right main landing gear collapsed during the landing roll. The airplane departed the right side of the runway, the nose and left main landing gear collapsed, and the airplane came to rest on its belly. Postaccident examination revealed impact damage to the inboard right main landing gear door that was consistent with the door being partially open when the damage was sustained. Because the inboard gear doors are closed when the landing gear is in the down position, the partially open position of the gear door indicates that the right main landing gear was not down and locked. No evidence was found of preimpact broken or disconnected parts in the right main landing gear extension/retraction mechanism. Impact damage to the landing gear precluded performance of a landing gear extension/retraction test, and the reason for the right main landing gear collapse was not determined. ## Factual narrative On November 25, 2011, about 0900 mountain standard time, a Cessna 310I, N8059M, sustained substantial damage when its right main landing gear collapsed during the landing roll at Sedona, Arizona. Neither the airline transport pilot nor his three passengers were injured. The pilot/owner was operating the airplane under the provisions of 14 Code of Federal Regulations Part 91. Visual meteorological conditions prevailed for the personal cross-country flight, which had originated from Chandler, Arizona, about 40 minutes before the accident. A flight plan had not been filed. The pilot said that the flight was uneventful, and he entered the traffic pattern for landing and completed the landing checklist, including lowering the flaps and landing gear. There were no anomalies until, during the landing roll, the right main landing gear collapsed, and the airplane departed the runway. Subsequently, the nose and left main landing gear collapsed, and the airplane came to rest on its belly. The airplane’s fuselage structure forward of the cockpit was bent and wrinkled. A Federal Aviation Administration (FAA) inspector observed and photographed the accident site and recovery of the airplane. Review of the FAA inspector's photographs showed ground scars consistent with the right propeller striking the runway, followed by a continuous scrape mark and tire marks corresponding to the nose and left main landing gears leading to the airplane. The left main inboard gear door appeared to be in the closed position, and the right main inboard gear door was partially open with the outboard portion of the door folded back against the inboard portion of the door. The left and right main gear side braces were both in an unlocked and partially retracted position. The left main gear was separated from the pivot points that attached it to the wing structure, and the left main landing gear wheel was separated from the gear leg. There were no visible broken or disconnected parts in the left main gear retraction/extension system. The right main landing gear had sustained relatively little damage in comparison to the left main landing gear. The right main gear remained intact, and, with the exception of the control rod for the right main inboard gear door, there were no visible broken or disconnected parts in the right main gear retraction/extension system. The control rod for the right main gear door was bent and separated with a shiny separation surface consistent with an overload failure. The nose landing gear was folded back and to the right. The extent of the impact damage to the landing gear precluded performance of a landing gear extension/retraction test. According to a representative of the airplane's manufacturer, the inboard main landing gear doors are closed when the landing gear is in both the up and down positions. The doors are only open when the landing gear is in transition. ## Aircraft - Registration: [N8059M](https://openairdocs.org/deregistered/N8059M-2012-07-25), registration cancelled 2012-07-25, S/N 310I0059, built 1964 (OpenAirDocs) - Reported make and model: CESSNA 310I - Registry model: [Cessna 310I](https://openairdocs.org/model/cessna-310i) (registry code 2074224) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 310I0059 - Airframe hours: 3299 - Engines: Continental IO-470-U1 160 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Chappell Hubert H - Registered owner: Chappell Hubert H - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 15, 2011 - Departed: CHD, Chandler, AZ - Destination: SEZ, Sedona, AZ - Airport: SEZ, Sedona Airport, runway 03, 5,132 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 72; injuries: none; commercial, airline transport, flight instructor; airplane ratings: multi-engine land, single-engine land; medical: class 3, with waivers/limitations; last flight review June 1, 2010; seat: left; flight hours: 11,482 total, 3,546 in this make and model, 11,328 as pilot in command, 31 in the last 90 days, 14 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 190° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 46 °F, dew point 37 °F - Altimeter: 30.10 inHg - Observed at: SEZ ## 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 20111125028229A](https://openairdocs.org/incident/20111125028229A), Nov 25, 2011: Cessna 310I, Sedona, AZ, Substantial damage. Aircraft landed at sez at 0900 hours. Shortly after landing the aircraft began to drift right. The pilot used ailerons to hold the right wing up until the… ## Docket (9 files) The files NTSB released with the investigation on September 11, 2012, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=82382. 12.5 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 722 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40375795&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Photo 1. First propeller slashes (item 2, .PDF, 1.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40376322&FileExtension=.PDF&FileName=Photo%201.%20First%20propeller%20slashes-Master.PDF - Photo 2. Runway scrapes (item 3, .PDF, 2.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40376323&FileExtension=.PDF&FileName=Photo%202.%20Runway%20scrapes-Master.PDF - Photo 3. Scrapes leaving runway (item 4, .PDF, 1.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40376324&FileExtension=.PDF&FileName=Photo%203.%20Scrapes%20leaving%20runway-Master.PDF - Photo 4. Airplane laying flat on its belly (item 5, .PDF, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40376326&FileExtension=.PDF&FileName=Photo%204.%20Airplane%20laying%20flat%20on%20its%20belly-Master.PDF - Photo 5. Right bent gear door (item 6, .PDF, 1.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40376328&FileExtension=.PDF&FileName=Photo%205.%20Right%20bent%20gear%20door-Master.PDF - Photo 6. Right main gear well (item 7, .PDF, 918 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40376333&FileExtension=.PDF&FileName=Photo%206.%20Right%20main%20gear%20well-Master.PDF - Photo 7. Left wheel well (item 8, .PDF, 967 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40376337&FileExtension=.PDF&FileName=Photo%207.%20Left%20wheel%20well%20-Master.PDF - Photo 8. Nose wheel (item 9, .PDF, 1.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40376338&FileExtension=.PDF&FileName=Photo%208.%20Nose%20wheel-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.