# NTSB WPR09MA159: Pilatus PC-12/45, N128CM, Butte, MT, March 22, 2009

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Class 1 · Major · Final report
- Date: March 22, 2009, 14:30 local (20:30 UTC)
- Place: Butte, MT
- Coordinates: 45.95, -112.483329 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.9500&lon=-112.4833&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Defining event: [Maneuvering: Loss of control in flight](https://openairdocs.org/ntsb-events/240)
- Highest injury: Fatal
- Injuries: 14 fatal
- Status: Completed, report July 22, 2011
- Report: Board-adopted at Board Meeting
- Investigation class: Class 1
- NTSB office: Western Pacific Region
- Parties: NTSB - Operations GC, NTSB - Meteorology GC, NTSB - Medical Officer, NTSB - AS-40, NTSB - Performance, NTSB - Survival Factors GC, NTSB - ATC GC, NTSB - Witness GC, NTSB - Materials Engineer, NTSB - Airworthiness GC, NTSB - Emergency Operations Coordinator, NTSB - Human Factors / Operations
- Safety recommendations: Yes
- NTSB case key (mKey): 73527
- NTSB case page: https://www.ntsb.gov/investigations/Pages/WPR09MA159.aspx
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/73527/pdf
- Board report AAR1105 (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR1105.pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=73527
- Page: https://openairdocs.org/ntsb/WPR09MA159

## Probable cause

(1) the pilot's failure to ensure that a fuel system icing inhibitor was added to the fuel before the flights on the day of the accident; (2) his failure to take appropriate remedial actions after a low fuel pressure state (resulting from icing within the fuel system) and a lateral fuel imbalance developed, including diverting to a suitable airport before the fuel imbalance became extreme; and (3) a loss of control while the pilot was maneuvering the left wing-heavy airplane near the approach end of the runway.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Action: lack of action](https://openairdocs.org/ntsb-findings/02041030): Personnel issues › Action/decision · Pilot (probable cause)
- [Performance/control parameters](https://openairdocs.org/ntsb-findings/01062000): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause)
- [Fluids: fuel additive](https://openairdocs.org/ntsb-findings/01071040): Aircraft › Fluids/misc hardware · Not specified (probable cause)
- [Inspection: preflight inspection](https://openairdocs.org/ntsb-findings/02061510): Personnel issues › Task performance · Pilot (probable cause)
- [Placards and markings](https://openairdocs.org/ntsb-findings/01011100): Aircraft › Aircraft handling/service · Not specified (probable cause)
- [Indicating/recording systems](https://openairdocs.org/ntsb-findings/01023100): Aircraft › Aircraft systems · Not specified (probable cause)
- [Equipment/furnishings: passenger compartment equip](https://openairdocs.org/ntsb-findings/01022520): Aircraft › Aircraft systems · Incorrect use/operation

## Analysis

The Safety Board's full report is available at http://www.ntsb.gov/investigations/reports_aviation.html. The Aircraft Accident Report number is NTSB/AAR-11-05. On March 22, 2009, about 1432 mountain daylight time, a Pilatus PC-12/45, N128CM, was diverting to Bert Mooney Airport (BTM), Butte, Montana, when it crashed about 2,100 feet west of runway 33 at BTM. The pilot and the 13 airplane passengers were fatally injured, and the airplane was substantially damaged by impact forces and a postcrash fire. The airplane was owned by Eagle Cap Leasing of Enterprise, Oregon, and was operating as a personal flight under the provisions of 14 Code of Federal Regulations Part 91. The flight departed Oroville Municipal Airport, Oroville, California, on an instrument flight rules flight plan with a destination of Gallatin Field, Bozeman, Montana. Visual meteorological conditions prevailed at the time of the accident.

## Factual narrative

The Safety Board's full report is available at http://www.ntsb.gov/investigations/reports_aviation.html. The Aircraft Accident Report number is NTSB/AAR-11-05. On March 22, 2009, about 1432 mountain daylight time, a Pilatus PC-12/45, N128CM, was diverting to Bert Mooney Airport (BTM), Butte, Montana, when it crashed about 2,100 feet west of runway 33 at BTM. The pilot and the 13 airplane passengers were fatally injured, and the airplane was substantially damaged by impact forces and a postcrash fire. The airplane was owned by Eagle Cap Leasing of Enterprise, Oregon, and was operating as a personal flight under the provisions of 14 Code of Federal Regulations Part 91. The flight departed Oroville Municipal Airport, Oroville, California, on an instrument flight rules flight plan with a destination of Gallatin Field, Bozeman, Montana. Visual meteorological conditions prevailed at the time of the accident.

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Prior to flight: Aircraft servicing event](https://openairdocs.org/ntsb-events/020)
- [Enroute-cruise: Fuel related](https://openairdocs.org/ntsb-events/190)
- [Maneuvering: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event)

## Aircraft

- Registration: [N128CM](https://openairdocs.org/deregistered/N128CM-2012-08-08), registration cancelled 2012-08-08, S/N 403, built 2001 (OpenAirDocs)
- Reported make and model: PILATUS PC-12/45
- Registry model: [Pilatus PC-12/45](https://openairdocs.org/model/pilatus-pc-12-45) (registry code 7090551) (OpenAirDocs)
- Registry engine: [Pratt & Whitney Canada PT6A-67B](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-67b) (registry code 52158, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: 403
- Airframe hours: 1815
- Engines: P & W Canada PT6A-67B 1200 horsepower turbo prop
- Damage: Substantial damage
- Fire: On-Ground
- Flight: Personal, Part 91
- Operator: Eagle Cap Leasing, Inc.
- Registered owner: Eagle Cap Leasing, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 9, 2008
- Departed: KOVE, Oroville, CA
- Destination: KBZN, Bozeman, MT
- Flight plan: IFR
- Airport: BTM, Bert Mooney Airport, runway 33, 9,001 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 65; injuries: fatal; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review January 9, 2009; seat: left; toxicology performed; flight hours: 8,840 total, 1,759 in this make and model, 35 in the last 90 days, 10 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 8 knots
- Visibility: 10 statute miles
- Lowest ceiling: 8,000 ft overcast
- Temperature: 45 °F, dew point 27 °F
- Altimeter: 30.00 inHg
- Observed at: KBTM

## 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 20090322004129A](https://openairdocs.org/incident/20090322004129A), Mar 22, 2009: Pilats PC1245, Butte, MT, Destroyed, 14 fatal. (-23) On March 22,2009, at approximately 1430 mountain daylight time (MDT) a Pilatus PC-12/45, N128CM, registered to eagle cap leasing, inc., enterprise,…

## Docket (78 files)

The files NTSB released with the investigation on March 21, 2024, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=73527.

- Summary paragraph errata (item 1, PDF, 1 page, 21 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154276&FileExtension=pdf&FileName=Summary%20Paragraph%20Errata-Master.pdf
- Operations 2-factual report of group chairman (item 2, PDF, 27 pages, 316 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154175&FileExtension=pdf&FileName=Operations%202-Factual%20Report%20of%20Group%20Chairman-Master.pdf
- Errata to operations 2-factual report of group chairman (item 3, PDF, 1 page, 16 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154209&FileExtension=pdf&FileName=Errata%20to%20Operations%202-Factual%20Report%20of%20Group%20Chairman-Master.pdf
- Operations 2-attachment 1-flight planning-flight plans (item 4, PDF, 5 pages, 171 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154135&FileExtension=pdf&FileName=Operations%202-Attachment%201-Flight%20Planning-Flight%20Plans-Rel.pdf
- Operations 2-attachment 2-eagle cap leasing corporation document (item 5, PDF, 4 pages, 108 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154138&FileExtension=pdf&FileName=Operations%202-Attachment%202-Eagle%20Cap%20Leasing%20Corporation%20Document-Rel.pdf
- Operations 2-attachment 3-PC12 limitations (item 6, PDF, 7 pages, 475 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154140&FileExtension=pdf&FileName=Operations%202-Attachment%203-PC12%20Limitations-Master.pdf
- Operations 2-attachment 4-emergency procedures-fuel system (item 7, PDF, 3 pages, 561 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154142&FileExtension=pdf&FileName=Operations%202-Attachment%204-Emergency%20Procedures-Fuel%20System-Master.pdf
- Operations 2-attachment 5-weight and balance (item 8, PDF, 17 pages, 382 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154144&FileExtension=pdf&FileName=Operations%202-Attachment%205-Weight%20and%20Balance-Master.pdf
- Operations 2-attachment 6-PC12 systems (item 9, PDF, 38 pages, 660 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154146&FileExtension=pdf&FileName=Operations%202-Attachment%206-PC12%20Systems-Master.pdf
- Operations 2-attachment 7-fueling records (item 10, PDF, 34 pages, 4.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154149&FileExtension=pdf&FileName=Operations%202-Attachment%207-Fueling%20Records-Rel.pdf
- Operations 2-attachment 8-fuel testing documentation (item 11, PDF, 3 pages, 104 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154152&FileExtension=pdf&FileName=Operations%202-Attachment%208-Fuel%20Testing%20Documentation-Rel.pdf
- Operations 2-attachment 9-interview summaries (item 12, PDF, 19 pages, 638 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154155&FileExtension=pdf&FileName=Operations%202-Attachment%209-Interview%20Summaries-Rel.pdf
- Operations 2-attachment 10-pilot training records (item 13, PDF, 24 pages, 2.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154158&FileExtension=pdf&FileName=Operations%202-Attachment%2010-Pilot%20Training%20Records-Rel.pdf
- Operations 2-attachment 11-PILOT'S summary of flight hours and resume (item 14, PDF, 3 pages, 102 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154161&FileExtension=pdf&FileName=Operations%202-Attachment%2011-Pilot%27s%20Summary%20of%20Flight%20Hours%20and%20Resume-Rel.pdf
- Operations 2-attachment 12-vacaville vcb airport manager statement (item 15, PDF, 2 pages, 134 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154178&FileExtension=pdf&FileName=Operations%202-Attachment%2012-Vacaville%20VCB%20Airport%20Manager%20Statement-Rel.pdf
- Operations 2-attachment 13-record of conversation-bill umberger (item 16, PDF, 3 pages, 73 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154181&FileExtension=pdf&FileName=Operations%202-Attachment%2013-Record%20of%20Conversation-Bill%20Umberger-Rel.pdf
- Operations 2-attachment 14-record of conversation-randy shares (item 17, PDF, 2 pages, 82 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154183&FileExtension=pdf&FileName=Operations%202-Attachment%2014-Record%20of%20Conversation-Randy%20Shares-Master.pdf
- Operations 2-attachment 15-record of conversation-cisco aguilera (item 18, PDF, 2 pages, 65 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154211&FileExtension=pdf&FileName=Operations%202-Attachment%2015-Record%20of%20Conversation-Cisco%20Aguilera-Master.pdf
- Operations 2-attachment 16-statement of record-ron cox (item 19, PDF, 4 pages, 205 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154214&FileExtension=pdf&FileName=Operations%202-Attachment%2016-Statement%20of%20Record-Ron%20Cox-Rel.pdf
- Operations 2-attachment 17-record of conversation-jim ott (item 20, PDF, 2 pages, 70 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154222&FileExtension=pdf&FileName=Operations%202-Attachment%2017-Record%20of%20Conversation-Jim%20Ott-Master.pdf
- Operations 2-attachment 18-memo-vacaville refueling (item 21, PDF, 2 pages, 179 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154227&FileExtension=pdf&FileName=Operations%202-Attachment%2018-Memo-Vacaville%20Refueling-Rel.pdf
- Operations 2-attachment 19-alternate airport information (item 22, PDF, 4 pages, 1 photo, 1.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154263&FileExtension=pdf&FileName=Operations%202-Attachment%2019-Alternate%20Airport%20Information-Master.pdf
- Operations 2-attachment 20-alternate airport flight track (item 23, PDF, 16 pages, 313 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154253&FileExtension=pdf&FileName=Operations%202-Attachment%2020-Alternate%20Airport%20Flight%20Track-Master.pdf
- Operations 2-attachment 21-statement of record-philip ensley (item 24, PDF, 2 pages, 29 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154266&FileExtension=pdf&FileName=Operations%202-Attachment%2021-Statement%20of%20Record-Philip%20Ensley-Rel.pdf
- Operations 2-attachment 22-record of conversation-larry jacento (item 25, PDF, 2 pages, 76 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154268&FileExtension=pdf&FileName=Operations%202-Attachment%2022-Record%20of%20Conversation-Larry%20Jacento-Master.pdf
- Operations 2-attachment 23-record of conversation-guy yocum (item 26, PDF, 2 pages, 77 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154270&FileExtension=pdf&FileName=Operations%202-Attachment%2023-Record%20of%20Conversation-Guy%20Yocum-Master.pdf
- Operations 2-attachment 24-video surveillance review (item 27, PDF, 3 pages, 106 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154281&FileExtension=pdf&FileName=Operations%202-Attachment%2024-Video%20Surveillance%20Review-Master.pdf
- ATC 3-factual report of group chairman (item 28, PDF, 15 pages, 335 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154194&FileExtension=pdf&FileName=ATC%203-Factual%20Report%20of%20Group%20Chairman-Master.pdf
- ATC 3-attachment 1-ATC transcripts (item 29, PDF, 15 pages, 498 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154102&FileExtension=pdf&FileName=ATC%203-Attachment%201-ATC%20Transcripts-Rel.pdf
- ATC 3-attachment 2-controller statements (item 30, PDF, 9 pages, 605 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154105&FileExtension=pdf&FileName=ATC%203-Attachment%202-Controller%20Statements-Rel.pdf
- ATC 3-attachment 3 -ATC facility record of daily operation (item 31, PDF, 1 page, 54 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154108&FileExtension=pdf&FileName=ATC%203-Attachment%203-ATC%20Facility%20Record%20of%20Daily%20Operation-Rel.pdf
- ATC 3-attachment 4-flight progress strips (item 32, PDF, 1 page, 28 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154110&FileExtension=pdf&FileName=ATC%203-Attachment%204-Flight%20Progress%20Strips-Master.pdf
- ATC 3-attachment 5-FSS controller statements (item 33, PDF, 3 pages, 242 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154113&FileExtension=pdf&FileName=ATC%203-Attachment%205-FSS%20Controller%20Statements-Rel.pdf
- ATC 3-attachment 6-FSS record of daily operation (item 34, PDF, 1 page, 63 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154116&FileExtension=pdf&FileName=ATC%203-Attachment%206-FSS%20Record%20of%20Daily%20Operation-Rel.pdf
- ATC 3-attachment 7-FSS audio transcripts (item 35, PDF, 10 pages, 379 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154119&FileExtension=pdf&FileName=ATC%203-Attachment%207-FSS%20Audio%20Transcripts-Rel.pdf
- ATC 3-attachment 8-radar ntap data for flight from ove to btm (item 36, PDF, 16 pages, 154 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154216&FileExtension=pdf&FileName=ATC%203-Attachment%208-Radar%20NTAP%20Data%20for%20flight%20from%20OVE%20to%20BTM-Master.pdf
- ATC 3-attachment 9-radar ntap data for flight from red to ove (item 37, PDF, 11 pages, 111 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154218&FileExtension=pdf&FileName=ATC%203-Attachment%209-Radar%20NTAP%20Data%20for%20flight%20from%20RED%20to%20OVE-Master.pdf
- Witness 4-factual report of group chairman (item 38, PDF, 39 pages, 3.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154186&FileExtension=pdf&FileName=Witness%204-Factual%20Report%20of%20Group%20Chairman-Rel.pdf
- Witness 4-witness 18 statement received 09-22-2009 (item 39, PDF, 2 pages, 53 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154124&FileExtension=pdf&FileName=Witness%204-Witness%2018%20Statement%20Received%2009-22-2009-Rel.pdf
- Meteorology 5-factual report of group chairman (item 40, PDF, 29 pages, 1.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154202&FileExtension=pdf&FileName=Meteorology%205-Factual%20Report%20of%20Group%20Chairman-Master.pdf
- Airworthiness factual report of group chairman (item 41, PDF, 48 pages, 5.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154173&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Master.pdf
- Airworthiness factual report of group chairman-attachment 1-ahrs a data-text (item 42, TXT, 2 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154165&FileExtension=txt&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Attachment%201-AHRS%20A%20Data-Text-Master.txt
- Airworthiness factual report of group chairman-attachment 2-attachment 2 bfu concise engineering report-cacu data (item 43, PDF, 7 pages, 262 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154167&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Attachment%202-Attachment%202%20BFU%20Concise%20Engineering%20Report-CACU%20Data-Master.pdf
- Airworthiness factual report of group chairman-attachment 3-cacu data-tabular (item 44, TXT): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154169&FileExtension=txt&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Attachment%203-CACU%20Data-Tabular-Master.txt
- Airworthiness factual report of group chairman-attachment 4-NON-volatile memory data study (item 45, PDF, 10 pages, 62 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154229&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Attachment%204-Non-Volatile%20Memory%20Data%20Study-Master.pdf
- Airworthiness factual report of group chairman-attachment 4-NON-volatile memory data study-errata sheet-1 (item 46, PDF, 2 pages, 19 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154274&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Attachment%204-Non-Volatile%20Memory%20Data%20Study-Errata%20Sheet-1-Master.pdf
- Airworthiness factual report of group chairman-attachment 4-NON-volatile memory data study-addendum 1 (item 47, PDF, 7 pages, 74 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154255&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Attachment%204-Non-Volatile%20Memory%20Data%20Study-Addendum%201-Master.pdf
- Airworthiness factual report of group chairman-attachment 5-attachment 5 eis data-tabular (item 48, TXT): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154171&FileExtension=txt&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Attachment%205-Attachment%205%20EIS%20Data-Tabular-Master.txt
- Airworthiness group chairman's factual report-addendum 1 (item 49, PDF, 17 pages, 346 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154233&FileExtension=pdf&FileName=Airworthiness%20Group%20Chairman%27s%20Factual%20Report-Addendum%201-Master.pdf
- Airworthiness factual report of group chairman-addendum 1-attachment 1-exemplar single engine turbo-propeller powe (item 50, PDF, 2 pages, 90 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154235&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Addendum%201-Attachment%201-Exemplar%20Single%20Engine%20Turbo-Propeller%20Pow-Master.pdf
- Airworthiness factual report of group chairman-addendum 1-attachment 2-cold test with excess water report crane d (item 51, PDF, 37 pages, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154243&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Addendum%201-Attachment%202-Cold%20Test%20with%20Excess%20Water%20Report%20Crane-Rel.pdf
- Airworthiness factual report of group chairman-addendum 1-attachment 3-flights 1557 1558 and 1559 fuel consumpti (item 52, PDF, 20 pages, 539 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154237&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Addendum%201-Attachment%203-Flights%201557%201558%20and%201559%20Fuel%20Consumpti-Master.pdf
- Airworthiness factual report of group chairman-addendum 1-attachment 4-Pilatus service bulletin 28-008 and crane s (item 53, PDF, 11 pages, 208 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154245&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Addendum%201-Attachment%204-Pilatus%20Service%20Bulletin%2028-008%20and%20Crane-Master.pdf
- Airworthiness factual report of group chairman-addendum 2 (item 54, PDF, 3 pages, 402 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154231&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Addendum%202-Master.pdf
- Airworthiness factual report of group chairman-addendum 3- (item 55, PDF, 2 pages, 19 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154257&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Addendum%203-Master.pdf
- Airworthiness group chairman's factual report-additional information_N666M event documentation (item 56, PDF, 18 pages, 681 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154240&FileExtension=pdf&FileName=Airworthiness%20Group%20Chairman%27s%20Factual%20Report-Additional%20Information_N666M%20Event%20Documentation-Rel.pdf
- Aircraft performance 13-airplane performance study (item 57, PDF, 7 pages, 340 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154220&FileExtension=pdf&FileName=Aircraft%20Performance%2013-Airplane%20Performance%20Study-Master.pdf
- Survival factors 6-specialist factual report (item 58, PDF, 3 pages, 20 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154188&FileExtension=pdf&FileName=Survival%20Factors%206-Specialist%20Factual%20Report-Master.pdf
- Survival factors 6-attachment 1 fom section 6 (item 59, PDF, 2 pages, 61 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154198&FileExtension=pdf&FileName=Survival%20Factors%206-Attachment%201%20FOM%20Section%206-Master.pdf
- Survival factors 6-attachment 2 preamble to 1971 seatbelt rule (item 60, PDF, 3 pages, 198 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154190&FileExtension=pdf&FileName=Survival%20Factors%206-Attachment%202%20Preamble%20to%201971%20Seatbelt%20Rule-Master.pdf
- Survival factors 6-attachment 3 FAA legal interpretation 1990-14 (item 61, PDF, 2 pages, 51 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154192&FileExtension=pdf&FileName=Survival%20Factors%206-Attachment%203%20FAA%20Legal%20Interpretation%201990-14-Master.pdf
- Survival factors 6-attachment 4 FAA report AM-400-91-2 (item 62, PDF, 5 pages, 210 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154196&FileExtension=pdf&FileName=Survival%20Factors%206-Attachment%204%20%20FAA%20Report%20AM-400-91-2-Master.pdf
- Materials laboratory 15-factual report 10-005 (item 63, PDF, 22 pages, 2.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154130&FileExtension=pdf&FileName=Materials%20Laboratory%2015-Factual%20Report%2010-005-Master.pdf
- Pilot-operator aircraft accident report NTSB form 61201 (item 64, PDF, 10 pages, 459 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154097&FileExtension=pdf&FileName=Pilot-Operator%20Aircraft%20Accident%20Report%20NTSB%20Form%2061201-Rel.pdf
- Comments from swiss accredited representative and technical advisors (item 65, PDF, 5 pages, 880 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154279&FileExtension=pdf&FileName=Comments%20from%20Swiss%20Accredited%20Representative%20and%20Technical%20Advisors-Rel.pdf
- Statement of party representatives to NTSB investigation (item 66, PDF, 6 pages, 436 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154205&FileExtension=pdf&FileName=Statement%20of%20Party%20Representatives%20to%20NTSB%20Investigation-Rel.pdf
- Retention-release of wreckage form (item 67, PDF, 1 page, 34 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154290&FileExtension=pdf&FileName=Retention-Release%20of%20Wreckage%20Form-Rel.pdf
- Toxicological report (item 68, PDF, 2 pages, 109 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154207&FileExtension=pdf&FileName=Toxicological%20Report-Master.pdf
- Fuel checklist REV5 (item 69, PDF, 2 pages, 24 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154285&FileExtension=pdf&FileName=Fuel%20Checklist%20Rev5-Master.pdf
- Fuel checklist REV6 (item 70, PDF, 5 pages, 67 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=154287&FileExtension=pdf&FileName=Fuel%20Checklist%20Rev6-Master.pdf
- NTSB response to petition for reconsideration (item 71, PDF, 48 pages, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15371001&FileExtension=pdf&FileName=Notation_57022_formatted-Rel.pdf
- NTSB - adopted board report - original (item 72, PDF, 92 pages, 2.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15369927&FileExtension=pdf&FileName=AAR-11-05%20Original%20Report-Rel.pdf
- NTSB - adopted board report - revised pages 4/17/2023 (item 73, PDF, 8 pages, 199 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15370242&FileExtension=pdf&FileName=revised%20pages%20in%20AAR-11-05-Rel.pdf
- Petition for reconsideration (item 74, PDF, 55 pages, 10.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15370282&FileExtension=pdf&FileName=PFR%202017%2057022_inc-Rel.pdf
- Petition for reconsideration - supplement (item 75, PDF, 38 pages, 3.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15370570&FileExtension=pdf&FileName=PFR%20supplement%2057022%208-8-2018%20Email-Rel.pdf
- Petition for reconsideration - attachment (item 76, PDF, 50 pages, 7.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15370318&FileExtension=pdf&FileName=PFR%20APPENDIX%203%20Affidavit%20of%20Richard%20McSwain-Rel.pdf
- Party comments on petition for reconsideration - crane company (item 77, PDF, 38 pages, 2.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15369490&FileExtension=pdf&FileName=PFR%20Crane%20comments%2057234_inc-Rel.pdf
- Party comments on petition for reconsideration - Pilatus aircraft ltd. (item 78, PDF, 129 pages, 13.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15369420&FileExtension=pdf&FileName=PRF%20Pilatus%20comments%2057235_inc-Rel.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.

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