# NTSB CEN19MA141: De Havilland DHC-2, N952DB, Ketchikan, AK, May 13, 2019 - Type: NTSB accident investigation - Classification: Accident · Fatal · Class 1 · Major · Final report - Date: May 13, 2019, 12:21 local (20:21 UTC) - Place: Ketchikan, AK - Coordinates: 55.425556, -131.505 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=55.4256&lon=-131.5050&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Defining events: [Maneuvering: Midair collision](https://openairdocs.org/ntsb-events/250); [Maneuvering: Midair collision](https://openairdocs.org/ntsb-events/250) - Highest injury: Fatal - Injuries: 6 fatal, 9 serious, 1 minor - Status: Completed, report April 20, 2021 - Report: Board-adopted at Board Meeting, Board meeting April 20, 2021 - Investigation class: Class 1 - NTSB office: Central Region - Parties: Genesys Aerosystems, Federal Aviation Adminstration, FreeFlight Systems, Venture Travel, LLC - Safety recommendations: Yes - NTSB case key (mKey): 99423 - NTSB case page: https://www.ntsb.gov/investigations/Pages/CEN19MA141.aspx - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/99423/pdf - Board report AAR2104 (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR2104.pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=99423 - Page: https://openairdocs.org/ntsb/CEN19MA141 ## Probable cause (aircraft 1) The inherent limitations of the see-and-avoid concept, which prevented the two pilots from seeing the other airplane before the collision, and the absence of visual and aural alerts from both airplanes’ traffic display systems, while operating in a geographic area with a high concentration of air tour activity. Contributing to the accident were (1) the Federal Aviation Administration’s provision of new transceivers that lacked alerting capability to Capstone Program operators without adequately mitigating the increased risk associated with the consequent loss of the previously available alerting capability and (2) the absence of a requirement for airborne traffic advisory systems with aural alerting among operators who carry passengers for hire. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Sensory ability/limitation: visual function](https://openairdocs.org/ntsb-findings/02011510): Personnel issues › Physical · Pilot (probable cause), aircraft 1; cases with it: [Dehavilland DHC-2 MK 1, 1 case](https://openairdocs.org/ntsb-findings/02011510/cases.md?model=2808006), [All aircraft, 32 cases](https://openairdocs.org/ntsb-findings/02011510/cases.md) - [Sensory ability/limitation: visual function](https://openairdocs.org/ntsb-findings/02011510): Personnel issues › Physical · Pilot of other aircraft (probable cause), aircraft 1; cases with it: [Dehavilland DHC-2 MK 1, 1 case](https://openairdocs.org/ntsb-findings/02011510/cases.md?model=2808006), [All aircraft, 32 cases](https://openairdocs.org/ntsb-findings/02011510/cases.md) - [Indicating/recording systems: central warning](https://openairdocs.org/ntsb-findings/01023150): Aircraft › Aircraft systems · Not specified (probable cause), aircraft 1; cases with it: [Dehavilland DHC-2 MK 1, 1 case](https://openairdocs.org/ntsb-findings/01023150/cases.md?model=2808006), [All aircraft, 9 cases](https://openairdocs.org/ntsb-findings/01023150/cases.md) - [Selection/certification/testing: equip certification/testing](https://openairdocs.org/ntsb-findings/04012015): Organizational issues › Development · FAA/Regulator (probable cause), aircraft 1; cases with it: [Dehavilland DHC-2 MK 1, 1 case](https://openairdocs.org/ntsb-findings/04012015/cases.md?model=2808006), [All aircraft, 21 cases](https://openairdocs.org/ntsb-findings/04012015/cases.md) - [Navigation system](https://openairdocs.org/ntsb-findings/01023400): Aircraft › Aircraft systems · Design (probable cause), aircraft 1; cases with it: [Dehavilland DHC-2 MK 1, 1 case](https://openairdocs.org/ntsb-findings/01023400/cases.md?model=2808006), [All aircraft, 13 cases](https://openairdocs.org/ntsb-findings/01023400/cases.md) - [Policy/procedure: adequacy of policy/proc](https://openairdocs.org/ntsb-findings/04021015): Organizational issues › Management · FAA/Regulator (probable cause), aircraft 1; cases with it: [Dehavilland DHC-2 MK 1, 1 case](https://openairdocs.org/ntsb-findings/04021015/cases.md?model=2808006), [All aircraft, 106 cases](https://openairdocs.org/ntsb-findings/04021015/cases.md) - [Pressures/demands: equipment/operational](https://openairdocs.org/ntsb-findings/03042030): Environmental issues › Task environment · Effect on operation, aircraft 1; cases with it: [Dehavilland DHC-2 MK 1, 1 case](https://openairdocs.org/ntsb-findings/03042030/cases.md?model=2808006), [All aircraft, 8 cases](https://openairdocs.org/ntsb-findings/03042030/cases.md) - [Sensory ability/limitation: visual function](https://openairdocs.org/ntsb-findings/02011510): Personnel issues › Physical · Pilot (probable cause), aircraft 2; cases with it: [Dehavilland DHC-3, 1 case](https://openairdocs.org/ntsb-findings/02011510/cases.md?model=2802412), [All aircraft, 32 cases](https://openairdocs.org/ntsb-findings/02011510/cases.md) - [Sensory ability/limitation: visual function](https://openairdocs.org/ntsb-findings/02011510): Personnel issues › Physical · Pilot of other aircraft (probable cause), aircraft 2; cases with it: [Dehavilland DHC-3, 1 case](https://openairdocs.org/ntsb-findings/02011510/cases.md?model=2802412), [All aircraft, 32 cases](https://openairdocs.org/ntsb-findings/02011510/cases.md) - [Indicating/recording systems: central warning](https://openairdocs.org/ntsb-findings/01023150): Aircraft › Aircraft systems · Not specified (probable cause), aircraft 2; cases with it: [Dehavilland DHC-3, 1 case](https://openairdocs.org/ntsb-findings/01023150/cases.md?model=2802412), [All aircraft, 9 cases](https://openairdocs.org/ntsb-findings/01023150/cases.md) - [Selection/certification/testing: equip certification/testing](https://openairdocs.org/ntsb-findings/04012015): Organizational issues › Development · FAA/Regulator (probable cause), aircraft 2; cases with it: [Dehavilland DHC-3, 1 case](https://openairdocs.org/ntsb-findings/04012015/cases.md?model=2802412), [All aircraft, 21 cases](https://openairdocs.org/ntsb-findings/04012015/cases.md) - [Navigation system](https://openairdocs.org/ntsb-findings/01023400): Aircraft › Aircraft systems · Design (probable cause), aircraft 2; cases with it: [Dehavilland DHC-3, 2 cases](https://openairdocs.org/ntsb-findings/01023400/cases.md?model=2802412), [All aircraft, 13 cases](https://openairdocs.org/ntsb-findings/01023400/cases.md) - [Policy/procedure: adequacy of policy/proc](https://openairdocs.org/ntsb-findings/04021015): Organizational issues › Management · FAA/Regulator (probable cause), aircraft 2; cases with it: [Dehavilland DHC-3, 2 cases](https://openairdocs.org/ntsb-findings/04021015/cases.md?model=2802412), [All aircraft, 106 cases](https://openairdocs.org/ntsb-findings/04021015/cases.md) - [Pressures/demands: equipment/operational](https://openairdocs.org/ntsb-findings/03042030): Environmental issues › Task environment · Effect on operation, aircraft 2; cases with it: [Dehavilland DHC-3, 1 case](https://openairdocs.org/ntsb-findings/03042030/cases.md?model=2802412), [All aircraft, 8 cases](https://openairdocs.org/ntsb-findings/03042030/cases.md) - [Navigation system](https://openairdocs.org/ntsb-findings/01023400): Aircraft › Aircraft systems · Incorrect use/operation, aircraft 2; cases with it: [Dehavilland DHC-3, 2 cases](https://openairdocs.org/ntsb-findings/01023400/cases.md?model=2802412), [All aircraft, 13 cases](https://openairdocs.org/ntsb-findings/01023400/cases.md) - [Policy/procedure: adequacy of policy/proc](https://openairdocs.org/ntsb-findings/04021015): Organizational issues › Management · Operator, aircraft 2; cases with it: [Dehavilland DHC-3, 2 cases](https://openairdocs.org/ntsb-findings/04021015/cases.md?model=2802412), [All aircraft, 106 cases](https://openairdocs.org/ntsb-findings/04021015/cases.md) - [Safety programs](https://openairdocs.org/ntsb-findings/04035000): Organizational issues › Support/oversight/monitoring · FAA/Regulator, aircraft 2; cases with it: [Dehavilland DHC-3, 1 case](https://openairdocs.org/ntsb-findings/04035000/cases.md?model=2802412), [All aircraft, 7 cases](https://openairdocs.org/ntsb-findings/04035000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Maneuvering: Midair collision](https://openairdocs.org/ntsb-events/250) (defining event), aircraft 1; cases with it: [Dehavilland DHC-2 MK 1, 1 case](https://openairdocs.org/ntsb-events/250/sequence.md?model=2808006), [All aircraft, 196 cases](https://openairdocs.org/ntsb-events/250/sequence.md) - [Maneuvering: Midair collision](https://openairdocs.org/ntsb-events/250) (defining event), aircraft 2; cases with it: [Dehavilland DHC-3, 1 case](https://openairdocs.org/ntsb-events/250/sequence.md?model=2802412), [All aircraft, 196 cases](https://openairdocs.org/ntsb-events/250/sequence.md) ## Analysis (aircraft 1) On May 13, 2019, about 1221 Alaska daylight time, a float-equipped de Havilland DHC 2 (Beaver) airplane, N952DB, and a float-equipped de Havilland DHC-3 (Otter) airplane, N959PA, collided in midair about 8 miles northeast of Ketchikan, Alaska. The DHC-2 pilot and four passengers sustained fatal injuries. The DHC-3 pilot sustained minor injuries, nine passengers sustained serious injuries, and one passenger sustained fatal injuries. The DHC-2 was destroyed, and the DHC-3 sustained substantial damage. The DHC-2 was registered to and operated by Mountain Air Service LLC, Ketchikan, Alaska, under the provisions of Title 14 Code of Federal Regulations (CFR) Part 135 as an on-demand sightseeing flight. The DHC-3 was registered to Pantechnicon Aviation LTD, Minden, Nevada, and operated by Venture Travel, LLC, dba Taquan Air, Ketchikan, Alaska, under the provisions of Part 135 as an on-demand sightseeing flight. Visual meteorological conditions prevailed in the area at the time of the accident. ## Aircraft 1 - Registration: [N952DB](https://openairdocs.org/deregistered/N952DB-2022-02-05), registration cancelled 2022-02-05, S/N 237 (OpenAirDocs) - Reported make and model: De Havilland DHC-2 - Registry model: [Dehavilland DHC-2 MK 1](https://openairdocs.org/model/dehavilland-dhc-2-mk-1) (registry code 2808006) (OpenAirDocs) - Registry engine: [Pratt & Whitney R-985-AN-14B](https://openairdocs.org/engine/pratt-whitney-r-985-an-14b) (registry code 51654, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 237 - Year built: 1952 - Airframe hours: 16452 - Engines: Pratt & Whitney R985-AN-14B 450 horsepower reciprocating - Damage: Destroyed - Flight: Part 135 - Operator: Mountain Air Service LLC - Registered owner: Mountain Air Service LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 16, 2019 - Destination: 5KE, Ketchikan, AK - Flight plan: VFR - Equipment: ADS-B, Electronic flight bag or handheld device ## Aircraft 2 - Registration: [N959PA](https://openairdocs.org/deregistered/N959PA-2021-07-10), registration cancelled 2021-07-10, S/N 159, built 1956 (OpenAirDocs) - Reported make and model: De Havilland DHC-3 - Registry model: [Dehavilland DHC-3](https://openairdocs.org/model/dehavilland-dhc-3) (registry code 2802412) (OpenAirDocs) - Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 159 - Year built: 1956 - Airframe hours: 30296.7 - Engines: Pratt & Whitney Canada PT6A-34 750 horsepower turbo prop - Damage: Substantial damage - Flight: Part 135 - Operator: Venture Travel, LLC, doing business as Taquan Air - Registered owner: Pantechnicon Aviation Ltd - Airworthiness certificate: Standard, Normal - Last inspection: AAIP, April 30, 2019 - Departed: Rudyerd Bay, AK - Destination: 5KE, Ketchikan, AK - Flight plan: Company VFR - Equipment: ADS-B, Electronic primary flight display, Electronic multifunction display ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot, aircraft N952DB; age 46; injuries: fatal; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land, single-engine sea, multi-engine sea; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review May 2, 2019; seat: left; restraint: 3-point; toxicology performed; flight hours: 11,000 total - Pilot, aircraft N959PA; age 60; injuries: minor; airline transport, commercial, flight instructor; airplane ratings: single-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review April 25, 2019; seat: left; restraint: 3-point; toxicology performed; flight hours: 25,000 total ## Weather - Conditions: Visual (VMC), Day - Wind: 130° at 11 knots, gusting 17 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 61 °F, dew point 37 °F - Altimeter: 29.90 inHg - Observed at: PAKT, 8 nm away ## FAA reports on this event (2) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20190513016761A](https://openairdocs.org/incident/20190513016761A), May 13, 2019: Dehavilland DHC-2 MK 1, Ketchikan, AK, Destroyed, 5 fatal. On Monday, may 13 at approximately 1221L, two Dehavilland floatplanes collided nine miles northeast of Ketchikan, AK (georges inlet) at an altitude of about… - [Accident 20190513016771A](https://openairdocs.org/incident/20190513016771A), May 13, 2019: Dehavilland DHC-3, Ketchikan, AK, Substantial damage, 1 fatal. ? On Monday, may 13, 2019 at approximately 1221 pm adt, two de havilland floatplanes collided eight miles northeast of Ketchikan, Alaska (george inlet) at an… ## Docket (55 files) The files NTSB released with the investigation on August 6, 2020, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=99423. 2.0 GB in all. - Taquan pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 6.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9797438&FileExtension=pdf&FileName=NTSB%20Pilot%20Operator%20Report%20Taquan_Redacted-Rel.pdf - Operations/human performance group chairman's factual report (item 2, PDF, 27 pages, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9851401&FileExtension=pdf&FileName=CEN19MA141AB%20Operations%20Human%20Performance%20Factual-Rel.pdf - Operations/human performance factual - attachment 1 a�� mountain air service - FAA form 8410-3 DHC-2 135.293 & 135.299 (item 3, PDF, 2 pages, 7.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9410917&FileExtension=pdf&FileName=Attachment%20Cover%201_Redacted-Rel.pdf - Operations/human performance factual - attachment 2 a�� mountain air service - pilot duty logs (item 4, PDF, 5 pages, 4.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9416043&FileExtension=pdf&FileName=Attachment%20Cover%202-Rel.pdf - Operations/human performance factual - attachment 3 a�� taquan air - FAA form 8410-3 DHC-2 135.293 & 135.299 (item 5, PDF, 2 pages, 3.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9415453&FileExtension=pdf&FileName=Attachment%20Cover%203_Redacted-Rel.pdf - Operations/human performance factual - attachment 4 a�� taquan air - single line entry record of checks and training form 2 (item 6, PDF, 2 pages, 928 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9415808&FileExtension=pdf&FileName=Attachment%20Cover%204-Rel.pdf - Operations/human performance factual - attachment 5 a�� taquan air - ground training a�� initial - form 4 (item 7, PDF, 2 pages, 2.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9415462&FileExtension=pdf&FileName=Attachment%20Cover%205_Redacted-Rel.pdf - Operations/human performance factual - attachment 6 a�� taquan air - FAA form 8410-3 DHC-3 135.293 & 135.299 (item 8, PDF, 2 pages, 3.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9416212&FileExtension=pdf&FileName=Attachment%20Cover%206_Redacted-Rel.pdf - Operations/human performance factual - attachment 7 a�� taquan air - ground training a�� recurrent and transition - form 4 (item 9, PDF, 2 pages, 1.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9416506&FileExtension=pdf&FileName=Attachment%20Cover%207-Rel.pdf - Operations/human performance factual - attachment 8 a�� taquan air - flight crewmember rest & flight time record (item 10, PDF, 4 pages, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9416668&FileExtension=pdf&FileName=Attachment%20Cover%208-Rel.pdf - Operations/human performance factual - attachment 9 a�� mountain air service a�� N952DB checklist (item 11, PDF, 2 pages, 726 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9416751&FileExtension=pdf&FileName=Attachment%20Cover%209-Rel.pdf - Operations/human performance factual - attachment 10 a�� taquan air a�� N959PA checklist (item 12, PDF, 2 pages, 755 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9415485&FileExtension=pdf&FileName=Attachment%20Cover%2010-Rel.pdf - Operations/human performance factual - attachment 11 a�� mountain air service - operations specification paragraph A008 (item 13, PDF, 6 pages, 7.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9417084&FileExtension=pdf&FileName=Attachment%20Cover%2011_Redacted-Rel.pdf - Operations/human performance factual - attachment 12 a�� taquan air - gom section 1 (item 14, PDF, 19 pages, 3.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9417319&FileExtension=pdf&FileName=Attachment%20Cover%2012_Redacted-Rel.pdf - Operations/human performance factual - attachment 13 a�� taquan air - operations specification paragraph A008 (item 15, PDF, 6 pages, 5.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9417359&FileExtension=pdf&FileName=Attachment%20Cover%2013-Rel.pdf - Operations/human performance factual - attachment 14 a�� ketchikan commercial operators letter of agreement a�� revised 5/1/2018 (item 16, PDF, 11 pages, 5.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9417390&FileExtension=pdf&FileName=Attachment%20Cover%2014_Redacted-Rel.pdf - Operations/human performance factual - attachment 15 a�� taquan air loa addendum (item 17, PDF, 2 pages, 362 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9417881&FileExtension=pdf&FileName=Attachment%20Cover%2015-Rel.pdf - Operations/human performance factual - attachment 16 a�� ketchikan commercial operators letter of agreement a�� revised 6/1/2019 (item 18, PDF, 12 pages, 3.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9417779&FileExtension=pdf&FileName=Attachment%20Cover%2016-Rel.pdf - Operations/human performance factual - attachment 17 - interview summaries, transcripts and records of conversation (item 19, PDF, 156 pages, 23.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9900268&FileExtension=pdf&FileName=Attachment%2017%20Redacted-Rel.pdf - Interview transcripts (item 20, PDF, 209 pages, 413 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11916471&FileExtension=pdf&FileName=Interview%20Transcripts_Redacted-Rel.pdf - Email correspondence - taquan air pilot (item 21, PDF, 7 pages, 199 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11916764&FileExtension=pdf&FileName=Email%20Correspondence_Redacted-Rel.pdf - Taquan air pilot - revised statement (item 22, PDF, 1 page, 28 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12058933&FileExtension=pdf&FileName=NTSB%20Statement%20DMS-Rel.pdf - Weather study (item 23, PDF, 10 pages, 1.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=8135037&FileExtension=pdf&FileName=WX_CEN19MA141AB_Study-Rel.pdf - Attachment 1 to the weather study (item 24, PDF, 7 pages, 1.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=8134624&FileExtension=pdf&FileName=WX_CEN19MA141AB_Attachment_1_redacted-Rel.pdf - Attachment 2 to the weather study (item 25, PDF, 10 pages, 603 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=8135028&FileExtension=pdf&FileName=WX_CEN19MA141AB_Attachment_2-Rel.pdf - Airworthiness group chairman's factual report (item 26, PDF, 17 pages, 169 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9822011&FileExtension=pdf&FileName=CEN19MA141AB%20Airworthiness%20Factual-Rel.pdf - Airworthiness group chairman's factual report - appendix a - figures (item 27, PDF, 12 pages, 11 photos, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9063077&FileExtension=pdf&FileName=CEN19MA141AB%20Airworthiness%20Appendix%20A%20-%20Figures-Rel.pdf - Airworthiness attachment 1 - N959PA maintenance information (item 28, PDF, 146 pages, 18.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9058579&FileExtension=pdf&FileName=CEN19MA141AB%20AW%20Att1%20-%20N959PA%20Mx%20Info_Redacted-Rel.pdf - Airworthiness attachment 2 - N952DB maintenance information (item 29, PDF, 158 pages, 23.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9062916&FileExtension=pdf&FileName=CEN19MA141AB%20AW%20Att2%20-%20N952DB%20Mx%20Info_Redacted-Rel.pdf - Instrument panel and garmin gls 71 photos (item 30, PDF, 3 pages, 4.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12150033&FileExtension=pdf&FileName=Instrument%20Panel%20Photo%20Array-Rel.pdf - FAA ADS-B file (item 31, CSV, 37.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9469115&FileExtension=csv&FileName=20190513150000_KTN-Rel.csv - Statement of party representatives to NTSB investigation taquan (item 32, PDF, 1 page, 75 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9813810&FileExtension=pdf&FileName=NTSB%20Party%20Statement%20Taquan_Redacted-Rel.pdf - Statement of party representatives to NTSB investigation - freeflight (item 33, PDF, 1 page, 129 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9797447&FileExtension=pdf&FileName=NTSB%20Party%20Statement%20Freeflight_Redacted-Rel.pdf - Statement of party representatives to NTSB investigation genesys aerosystems (item 34, PDF, 1 page, 2.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9796248&FileExtension=pdf&FileName=NTSB%20Party%20Statement%20Genesys%20Aerosystems_Redacted-Rel.pdf - Survival factors 6 - factual report of specialist (item 35, PDF, 13 pages, 3.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9998825&FileExtension=pdf&FileName=CEN19MA141AB%20SF%20Factual%20FINAL-Rel.pdf - Survival factos 6 - attachment 1 - interview transcripts (item 36, PDF, 80 pages, 310 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9997397&FileExtension=pdf&FileName=Attachment%201%20-%20SF%20Interview%20Transcripts%20FINAL3_Redacted-Rel.pdf - Survival factors 6 - attachment 2 - interview summaries (item 37, PDF, 21 pages, 130 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9998140&FileExtension=pdf&FileName=Attachment%202%20-%20Interview%20Summaries%20FINAL-Rel.pdf - Survival factors 6 - attachment 3 - USCG timeline (item 38, PDF, 2 pages, 26 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9999254&FileExtension=pdf&FileName=Attachment%203%20-%20USCG%20Timeline-Rel.pdf - Survival factors 6 - attachment 4 - injury chart (item 39, PDF, 3 pages, 127 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10000625&FileExtension=pdf&FileName=Attachment%204%20-%20Injury%20Chart2-Rel.pdf - Medical factual (item 40, PDF, 3 pages, 83 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9966857&FileExtension=pdf&FileName=CEN19MA141AB_Ketchikan_AK_Medical_Factual_FINAL_072120-Rel.pdf - Toxicological report - beaver pilot (item 41, PDF, 1 page, 33 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9970986&FileExtension=pdf&FileName=CAMI%20Tox%20-%20Beaver%20Pilot%20Redact-Rel.pdf - Systems factual - ADS-B (item 42, PDF, 7 pages, 66 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9984662&FileExtension=pdf&FileName=CEN19MA141AB%20Systems%20Factual-Rel.pdf - Systems factual attachment - caprfp (item 43, PDF, 13 pages, 53 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9984273&FileExtension=pdf&FileName=CAPRFP-Rel.pdf - Systems factual attachment - ups-at letter to FAA (item 44, PDF, 2 pages, 39 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9984556&FileExtension=pdf&FileName=UPS-AT%20letter%20%20to%20FAA-Rel.pdf - Multiple electronic devices factual report (item 45, PDF, 13 pages, 1.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9988980&FileExtension=pdf&FileName=multiple%20devices%20factual-Rel.pdf - Multiple electronic devices factual report - attachment 1 - tabular data (item 46, CSV, 143 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9989243&FileExtension=csv&FileName=data%20for%20dms-Rel.csv - Personal electronic devices factual report (item 47, PDF, 4 pages, 244 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9988989&FileExtension=pdf&FileName=CEN19MA141AB%20PED%20Factual%20Report-Rel.pdf - Aircraft performance & cockpit visibility study (item 48, PDF, 111 pages, 9.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10009099&FileExtension=pdf&FileName=CEN19MA141AB_ADSB%20study%20E-Rel.pdf - On board video summary report (item 49, PDF, 2 pages, 15 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10033041&FileExtension=pdf&FileName=factual-Rel.pdf - Airworthiness group chairman's factual report-errata 1 (item 50, PDF, 1 page, 37 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10098096&FileExtension=pdf&FileName=CEN19MA141AB%20Airworthiness%20Factual%20Errata1-Rel.pdf - Email correspondence - part 135 operators sms (item 51, PDF, 2 pages, 769 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12028578&FileExtension=pdf&FileName=FAA%20Part%20135%20SMS%20Operators_Redacted-Rel.pdf - Memorandum concerning pilot reports regarding N952DB not appearing on chelton ADS-B traffic displays (item 52, PDF, 14 pages, 750 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12064351&FileExtension=pdf&FileName=CEN19MA141AB_EF_memo_B-Rel.pdf - Animation description (item 53, PDF, 8 pages, 105 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12258590&FileExtension=pdf&FileName=Ketchikan_animation_description_for_publication-Rel.pdf - AIR-22-09 implement special federal aviation regulation for air tours near ketchikan, Alaska (item 54, PDF, 20 pages, 776 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14790589&FileExtension=pdf&FileName=AIR2209-Rel.pdf - Video recordings of chelton and foreflight traffic display recreations at freeflight (item 55, ZIP, 1.8 GB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15333686&FileExtension=zip&FileName=FreeFlight_recordings-Rel.zip 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.