# NTSB CHI01LA086: Cessna 310Q, N10ET, Mitchell, SD, February 7, 2001 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: February 7, 2001, 14:55 local (20:55 UTC) - Place: Mitchell, SD - Coordinates: 43.73093, -98.029541 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=43.7309&lon=-98.0295&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report October 9, 2001 - Report: Approved by Office Director - Parties: FAA - Rapid City FSDO - NTSB case key (mKey): 51804 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI01LA086 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/51804/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=51804 - Page: https://openairdocs.org/ntsb/CHI01LA086 ## Probable cause The pilot disregarded the aircraft limitation placard, and attempted flight into known adverse weather after receiving a hazardous weather advisory. Factors to the accident were the ice-covered cockpit windshield, the ice-covered runway, and the snowbank. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight encounter with weather, cruise - normal - weather condition - icing conditions (contributing factor) - flight into known adverse weather - attempted, pilot in command (cause) - unsafe/hazardous condition warning - disregarded, pilot in command (cause) - hazardous weather advisory - disregarded, pilot in command (cause) - Loss of control - on ground/water, landing - roll - airport facilities,runway/landing area condition - icy (contributing factor) - window,flight compartment window/windshield - ice (contributing factor) - On ground/water encounter with terrain/water, landing - roll - terrain condition - snowbank (contributing factor) ## Analysis During cruise flight the aircraft encountered icing-conditions andthe pilot elected to divert to a near-by airport. During the landing attempt, the aircraft slid into a snowbank, resulting in substantial damage to the aircraft. The pilot stated, "Trying to get on top after being cleared to 14,000 msl I decided it was better [to] land. Clearance was given for VOR 12 [instrument] approach at Mitchell S.D. [Mitchell Municipal Airport]. Due to poor forward visibility due to ice on the windshield, I landed on a very icy runway and slid into plowed snow, causing damage [to] the plane." According to records provided from the Federal Aviation Administration (FAA) records from Huron Automated Flight Service Station, the pilot had received a standard weather briefing prior to the accident flight. According to a transcript of the weather briefing, the Huron-AFSS briefer informed the pilot that there was, "moderate rime or mixed icing in clouds and in precipitation below flight level one eight zero for your entire route". At the completion of the standard weather briefing the pilot filed an instrument flight plan for a flight from Sioux Falls to Rapid City. Postaccident investigation of the airplane revealed a placard located on the instrument panel that stated, "Warning - Not Certified For Flight Into Known Icing Conditions". ## Factual narrative On February 7, 2001, at 1455 central standard time, a Cessna 310Q, N10ET, piloted by a private pilot, sustained substantial damage during landing roll when the airplane slid off runway 12 (6,700 feet by 100 feet, ice-covered/asphalt) at the Mitchell Municipal Airport, Mitchell, South Dakota. Instrument meteorological conditions prevailed at the time of the accident. The personal flight was operating under the provisions of 14 CFR Part 91 and was on an active instrument flight plan. The pilot and his three passengers reported no injuries. The flight had departed from the Joe Foss Field Airport, Sioux Falls, South Dakota, at 1406. According to the pilot's written statement, he was en route from Sioux Falls to Rapid City when he encountered icing-conditions at 6,000-feet mean sea level (msl). The pilot reported, "Trying to get on top after being cleared to 14,000 msl I decided it was better [to] land. Clearance was given for VOR 12 [instrument] approach at Mitchell S.D. [Mitchell Municipal Airport]. Due to poor forward visibility due to ice on the windshield, I landed on a very icy runway and slid into plowed snow, causing damage [to] the plane." According to records provided from the Federal Aviation Administration (FAA) records from Huron Automated Flight Service Station, the pilot had received a standard weather briefing prior to the accident flight. According to a transcript of the weather briefing, the Huron-AFSS briefer informed the pilot that there was, "moderate rime or mixed icing in clouds and in precipitation below flight level one eight zero for your entire route". At the completion of the standard weather briefing the pilot filed an instrument flight plan for a flight from Sioux Falls to Rapid City. A copy of the transcript is appended to this factual report. Postaccident investigation of the airplane revealed a placard located on the instrument panel that stated, "Warning - Not Certified For Flight Into Known Icing Conditions". A photo of the placard is appended to this factual report. ## Aircraft - Registration: [N10ET](https://openairdocs.org/aircraft/N10ET), registered now, S/N 310Q0415, built 1971 (OpenAirDocs) - Reported make and model: Cessna 310Q - Registry model: [Cessna 310Q](https://openairdocs.org/model/cessna-310q) (registry code 2074242) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 310Q0415 - Airframe hours: 3956.4 - Engines: Continental IO-420-V0 260 horsepower reciprocating; Continental IO-420-V0 260 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, June 25, 2000, 45.9 hours before - Departed: FSD, SIOUX FALLS, SD - Destination: MHE, Mitchell, SD - Flight plan: IFR - Airport: MHE, Mitchell Municipal Airport, runway 12, 6,700 × 100 ft, ice ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 46; injuries: none; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; last flight review May 1, 1999; seat: left; flight hours: 1,674 total, 1,038 in this make and model, 1,543 as pilot in command, 35 in the last 90 days, 25 in the last 30 days, 6 in the last 24 hours ## Weather - Conditions: Instrument (IMC), Day - Wind: 60° at 18 knots - Visibility: 2.5 statute miles - Lowest ceiling: 1,000 ft overcast - Temperature: 23 °F, dew point 21 °F - Altimeter: 29.98 inHg - Observed at: MHE ## 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 20010207009959A](https://openairdocs.org/incident/20010207009959A), Feb 7, 2001: Cessna 310Q, Mitchell, SD, No damage. (.19)On February 7, 2001, at 1512 central standard time, a Cessna 310Q, N10ET, piloted by a private pilot, sustained substantial damage during landing roll… ## Docket (3 files) The files NTSB released with the investigation on September 20, 2001, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=51804. 984 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 522 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40422463&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Transcripts of Voice Recordings (item 2, .PDF, 421 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40422464&FileExtension=.PDF&FileName=Transcripts%20of%20Voice%20Recordings-Redacted.PDF - Photo 1. Warning Placard For Cessna 310. FAA Photo (item 3, .PDF, 42 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40146312&FileExtension=.PDF&FileName=Photo%201.%20%20Warning%20Placard%20For%20Cessna%20310.%20%20FAA%20Photo-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.