# NTSB CEN11LA120: Beech 300, N206K, Minneapolis, MN, December 10, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: December 10, 2010, 17:20 local (23:20 UTC) - Place: Minneapolis, MN - Coordinates: 44.879165, -93.220954 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=44.8792&lon=-93.2210&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Defining event: [Enroute-climb to cruise: Part(s) separation from AC](https://openairdocs.org/ntsb-events/338) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report June 20, 2011 - Report: Approved by Office Director - NTSB office: Central Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 78036 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN11LA120 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/78036/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=78036 - Page: https://openairdocs.org/ntsb/CEN11LA120 ## Probable cause The pilot's failure to follow the aircraft checklist in locking the cabin door prior to departure which resulted in its in-flight separation. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: use of checklist](https://openairdocs.org/ntsb-findings/02063030): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Beech 300, 1 case](https://openairdocs.org/ntsb-findings/02063030/cases.md?model=1152930), [All aircraft, 336 cases](https://openairdocs.org/ntsb-findings/02063030/cases.md) - [Action: incomplete action](https://openairdocs.org/ntsb-findings/02041040): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Beech 300, 1 case](https://openairdocs.org/ntsb-findings/02041040/cases.md?model=1152930), [All aircraft, 105 cases](https://openairdocs.org/ntsb-findings/02041040/cases.md) - [Doors: passenger/crew doors](https://openairdocs.org/ntsb-findings/01035210): Aircraft › Aircraft structures · Incorrect use/operation (probable cause); cases with it: [Beech 300, 1 case](https://openairdocs.org/ntsb-findings/01035210/cases.md?model=1152930), [All aircraft, 86 cases](https://openairdocs.org/ntsb-findings/01035210/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: Preflight or dispatch event](https://openairdocs.org/ntsb-events/030); cases with it: [Beech 300, 1 case](https://openairdocs.org/ntsb-events/030/sequence.md?model=1152930), [All aircraft, 355 cases](https://openairdocs.org/ntsb-events/030/sequence.md) - [Enroute-climb to cruise: Part(s) separation from AC](https://openairdocs.org/ntsb-events/338) (defining event); cases with it: [Beech 300, 1 case](https://openairdocs.org/ntsb-events/338/sequence.md?model=1152930), [All aircraft, 563 cases](https://openairdocs.org/ntsb-events/338/sequence.md) - [Enroute-climb to cruise: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Beech 300, 3 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=1152930), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The cabin entry door separated from the airplane during climb and was found about 6 miles from the departure airport. The airplane returned to the departure airport and landed without further incident. The door handle was found to be in the latch position and not in the lock position. Postaccident examination of the airplane revealed no anomalies that would have precluded normal operation of the door system. ## Factual narrative On December 10, 2010, about 1720 central standard time, a Beech 300, N206K, received substantial damage during an in-flight door separation after departure from Minneapolis-St Paul International/Wold-Chamberlain Airport (MSP), Minneapolis, Minnesota. The airplane returned and landed at MSP without further incident. Visual meteorological conditions prevailed at the time accident. The airline transport pilot and one passenger were uninjured. The 14 Code of Federal Regulations Part 91 flight was operating on an instrument rules flight plan. The flight originated from MSP about 1718 and was en route to Joe Foss Field Airport (FSD), Sioux Falls, South Dakota. According to the Federal Aviation Administration (FAA), the airplane was climbing through 7,000 feet when the pilot reported to Minneapolis Air Traffic Control that the airplane had a pressurization problem. He did not report that the cabin entry door had separated from the airplane. Examination of the airplane by the FAA revealed an estimated 4-inch hole in the rear fuselage and no damage to the fuselage cabin entry door pin holes. Electrical continuity of the door wiring was confirmed, and the door open annunciator light was functional. On January 26, 2011, the door was located about 6 miles west of MSP. The door handle was in the latch position and not in the lock position. No mechanical anomalies were noted with the door. ## Aircraft - Registration: [N206K](https://openairdocs.org/deregistered/N206K-2019-04-10), registration cancelled 2019-04-10, S/N FA-36, built 1984 (OpenAirDocs) - Reported make and model: BEECH 300 - Registry model: [Beech 300](https://openairdocs.org/model/beech-300) (registry code 1152930) (OpenAirDocs) - Registry engine: [Pratt & Whitney Canada PT6A-60A](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-60a) (registry code 52043, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: FA-36 - Airframe hours: 11248 - Engines: Pratt & Whitney PT6A-60A 1050 lbs thrust turbo prop - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Diamond 1A LLC - Registered owner: Diamond 1A LLC - Airworthiness certificate: Standard, Normal - Last inspection: June 23, 2010 - Departed: MSP, Minneapolis, MN - Destination: FSD, Sioux Falls, SD - Flight plan: IFR - Airport: MSP, Minneapolis-St Paul Internatio ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 60; injuries: none; flight instructor, airline transport, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review April 7, 2010; seat: left; flight hours: 11,533 total, 11,149 as pilot in command, 86 in the last 90 days, 30 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Dusk - Wind: 50° at 6 knots - Visibility: 8 statute miles - Lowest ceiling: 11,000 ft overcast - Temperature: 25 °F, dew point 12 °F - Altimeter: 29.92 inHg - Observed at: MSP, 6 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 20101210054909A](https://openairdocs.org/incident/20101210054909A), Dec 10, 2010: Beech 300, Minneapolis, MN, Substantial damage. Aircraft departed kmsp at 1715 local time from runway 30L. The aircraft returned to kmsp a short time later because of, as described by the pilot, a… ## Docket (4 files) The files NTSB released with the investigation on May 9, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=78036. 1.3 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 743 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40342276&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Record of Conversation - FAA 12/16/10 (item 2, .PDF, 23 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40346703&FileExtension=.PDF&FileName=Record%20of%20Conversation%20-%20FAA%2012%2F16%2F10-Master.PDF - Record of Conversation - FAA 01/26/11 (item 3, .PDF, 47 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40346712&FileExtension=.PDF&FileName=Record%20of%20Conversation%20-%20FAA%2001%2F26%2F11-Redacted.PDF - FAA Provided Photos of Cabin Door (item 4, .PDF, 2 photos, 443 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40346741&FileExtension=.PDF&FileName=FAA%20Provided%20Photos%20of%20Cabin%20Door-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.