# NTSB WPR19MA177: Beech 65-A90, N256TA, Mokuleia, HI, June 22, 2019

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Class 2 · Major · Final report
- Date: June 21, 2019, 18:22 local (Jun 22, 2019, 04:22 UTC)
- Place: Mokuleia, HI
- Coordinates: 21.580554, -158.18833
- Nearby events: https://openairdocs.org/map.md?lat=21.5806&lon=-158.1883&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Defining event: [Takeoff: Abrupt maneuver](https://openairdocs.org/ntsb-events/270)
- Highest injury: Fatal
- Injuries: 11 fatal
- Status: Completed, report March 23, 2021
- Report: Board-adopted at Board Meeting, Board meeting March 23, 2021
- Investigation class: Class 2
- NTSB office: Western Pacific Region
- Parties: Hartzell Propeller, Textron Aviation, Transportation Safety Board of Canada, Federal Aviation Administration AVP-100
- Safety recommendations: Yes
- NTSB case key (mKey): 99686
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR19MA177
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/99686/pdf
- Board report AAR2102 (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR2102.pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=99686
- Page: https://openairdocs.org/ntsb/WPR19MA177

## Probable cause

The pilot’s aggressive takeoff maneuver, which resulted in an accelerated stall and subsequent loss of control at an altitude that was too low for recovery. Contributing to the accident were (1) the operation of the airplane near its aft center of gravity limit and the pilot’s lack of training and experience with the handling qualities of the airplane in this flight regime; (2) the failure of Oahu Parachute Center and its contract mechanic to maintain the airplane in an airworthy condition and to detect and repair the airplane’s twisted left wing, which reduced the airplane’s stall margin; and (3) the Federal Aviation Administration’s (FAA) insufficient regulatory framework for overseeing parachute jump operations. Contributing to the pilot’s training deficiencies was the FAA’s lack of awareness that the pilot’s flight instructor was providing substandard training.

## Findings

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

- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Beech 65-A90, 2 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=1152908), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Training: type/qual of instruct/training](https://openairdocs.org/ntsb-findings/02031535): Personnel issues › Experience/knowledge · Pilot (probable cause); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/02031535/cases.md?model=1152908), [All aircraft, 8 cases](https://openairdocs.org/ntsb-findings/02031535/cases.md)
- [Personality/attitude: self confidence](https://openairdocs.org/ntsb-findings/02021010): Personnel issues › Psychological · Pilot (probable cause); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/02021010/cases.md?model=1152908), [All aircraft, 16 cases](https://openairdocs.org/ntsb-findings/02021010/cases.md)
- [Performance/control parameters: angle of attack](https://openairdocs.org/ntsb-findings/01062042): Aircraft › Aircraft oper/perf/capability · Capability exceeded (probable cause); cases with it: [Beech 65-A90, 2 cases](https://openairdocs.org/ntsb-findings/01062042/cases.md?model=1152908), [All aircraft, 990 cases](https://openairdocs.org/ntsb-findings/01062042/cases.md)
- [Aircraft capability: cG/weight distribution](https://openairdocs.org/ntsb-findings/01061040): Aircraft › Aircraft oper/perf/capability · Capability exceeded (probable cause); cases with it: [Beech 65-A90, 2 cases](https://openairdocs.org/ntsb-findings/01061040/cases.md?model=1152908), [All aircraft, 66 cases](https://openairdocs.org/ntsb-findings/01061040/cases.md)
- [Wing structure: main frame (on wing)](https://openairdocs.org/ntsb-findings/01035710): Aircraft › Aircraft structures · Damaged/degraded (probable cause); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/01035710/cases.md?model=1152908), [All aircraft, 8 cases](https://openairdocs.org/ntsb-findings/01035710/cases.md)
- [Policy/procedure: adequacy of policy/proc](https://openairdocs.org/ntsb-findings/04021015): Organizational issues › Management · Operator; cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/04021015/cases.md?model=1152908), [All aircraft, 106 cases](https://openairdocs.org/ntsb-findings/04021015/cases.md)
- [Maintenance/inspections](https://openairdocs.org/ntsb-findings/01010500): Aircraft › Aircraft handling/service · Inadequate inspection (probable cause); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/01010500/cases.md?model=1152908), [All aircraft, 103 cases](https://openairdocs.org/ntsb-findings/01010500/cases.md)
- [Maintenance/inspections](https://openairdocs.org/ntsb-findings/01010500): Aircraft › Aircraft handling/service · Incorrect service/maintenance (probable cause); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/01010500/cases.md?model=1152908), [All aircraft, 103 cases](https://openairdocs.org/ntsb-findings/01010500/cases.md)
- [Oversight: oversight of operation](https://openairdocs.org/ntsb-findings/04032015): Organizational issues › Support/oversight/monitoring · FAA/Regulator (probable cause); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/04032015/cases.md?model=1152908), [All aircraft, 61 cases](https://openairdocs.org/ntsb-findings/04032015/cases.md)
- [Oversight: oversight of maintenance](https://openairdocs.org/ntsb-findings/04032020): Organizational issues › Support/oversight/monitoring · FAA/Regulator (probable cause); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/04032020/cases.md?model=1152908), [All aircraft, 28 cases](https://openairdocs.org/ntsb-findings/04032020/cases.md)
- [Training: initial training](https://openairdocs.org/ntsb-findings/04031010): Organizational issues › Support/oversight/monitoring · FAA/Regulator (probable cause); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/04031010/cases.md?model=1152908), [All aircraft, 15 cases](https://openairdocs.org/ntsb-findings/04031010/cases.md)
- [Inspection: scheduled/routine inspection](https://openairdocs.org/ntsb-findings/02061520): Personnel issues › Task performance · Maintenance personnel (probable cause); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/02061520/cases.md?model=1152908), [All aircraft, 167 cases](https://openairdocs.org/ntsb-findings/02061520/cases.md)
- [Maintenance: scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010): Personnel issues › Task performance · Maintenance personnel (probable cause); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/02062010/cases.md?model=1152908), [All aircraft, 320 cases](https://openairdocs.org/ntsb-findings/02062010/cases.md)
- [Culture: safety](https://openairdocs.org/ntsb-findings/04024010): Organizational issues › Management · Operator; cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/04024010/cases.md?model=1152908), [All aircraft, 11 cases](https://openairdocs.org/ntsb-findings/04024010/cases.md)
- [Maintenance/inspections](https://openairdocs.org/ntsb-findings/01010500): Aircraft › Aircraft handling/service · Related records; cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/01010500/cases.md?model=1152908), [All aircraft, 103 cases](https://openairdocs.org/ntsb-findings/01010500/cases.md)
- [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Instructor/check pilot; cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=1152908), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md)
- [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Other; cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=1152908), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md)
- [Personality/attitude](https://openairdocs.org/ntsb-findings/02021000): Personnel issues › Psychological · Instructor/check pilot; cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-findings/02021000/cases.md?model=1152908), [All aircraft, 3 cases](https://openairdocs.org/ntsb-findings/02021000/cases.md)

## Sequence of events

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

- [Takeoff: Abrupt maneuver](https://openairdocs.org/ntsb-events/270) (defining event); cases with it: [Beech 65-A90, 1 case](https://openairdocs.org/ntsb-events/270/sequence.md?model=1152908), [All aircraft, 346 cases](https://openairdocs.org/ntsb-events/270/sequence.md)
- [Takeoff: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241); cases with it: [Beech 65-A90, 2 cases](https://openairdocs.org/ntsb-events/241/sequence.md?model=1152908), [All aircraft, 1,529 cases](https://openairdocs.org/ntsb-events/241/sequence.md)
- [Uncontrolled descent: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Beech 65-A90, 2 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=1152908), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md)

## Analysis

Analysis pending

## Factual narrative

Factual Pending

## Aircraft

- Registration: [N256TA](https://openairdocs.org/deregistered/N256TA-2021-09-04), registration cancelled 2021-09-04, S/N LJ-256, built 1967 (OpenAirDocs)
- Reported make and model: Beech 65-A90
- Registry model: [Beech 65-A90](https://openairdocs.org/model/beech-65-a90) (registry code 1152908) (OpenAirDocs)
- Registry engine: [Pratt & Whitney PT6A series](https://openairdocs.org/engine/pratt-whitney-pt6a-series) (registry code 52032, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: LJ-256
- Year built: 1967
- Engines: Pratt & Whitney Canada PT6 Series turbo prop; Pratt & Whitney Canada PT6 Series turbo prop
- Damage: Destroyed
- Fire: On-Ground
- Flight: Skydiving, Part 91
- Operator: Oahu Parachute Center
- Airworthiness certificate: Standard, Normal
- Departed: HDH, Mokuleia, HI
- Airport: HDH, Dillingham Airfield, runway 08, 9,007 × 75 ft, asphalt
- Equipment: None

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; injuries: fatal; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review December 13, 2017; seat: left; restraint: lap only; toxicology performed; flight hours: 1,086 total, 214 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 6 knots
- Visibility: 10 statute miles
- Lowest ceiling: 6,000 ft broken
- Temperature: 75 °F, dew point 70 °F
- Altimeter: 29.93 inHg
- Observed at: PHHI, 10 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 20190622020029A](https://openairdocs.org/incident/20190622020029A), Jun 22, 2019: Beech 65-A90, Mokuleia, HI, Destroyed, 11 fatal. On June 21, 2019, at 1822 Hawaii standard time, N256TA, a Beech 65-A90, crashed under unknown circumstances just after takeoff from Dillingham airfield (hdh),…

## Other investigations on N256TA (1)

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.

- [NTSB WPR16LA150](https://openairdocs.org/ntsb/WPR16LA150), Jul 24, 2016: Beech 65 A90 (N256TA), Byron, CA, substantial damage. Probable cause: The pilot’s failure to maintain an adequate airspeed and his exceedance of the airplane’s critical angle of attack, which resulted in an aerodynamic stall and subsequent spin. Also causal to the…

## Docket (43 files)

The files NTSB released with the investigation on October 28, 2020, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=99686. 202 MB in all.

- Medical factual report (item 1, PDF, 5 pages, 229 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9443949&FileExtension=pdf&FileName=WPR19MA177_Medical%20Factual%20Report_rev4-Rel.pdf
- Medical factual report addendum 1 (item 2, PDF, 2 pages, 208 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11391025&FileExtension=pdf&FileName=WPR19MA177_Medical%20Factual%20Report%20Addendum-Rel.pdf
- Operations group chairman's factual report (item 3, PDF, 61 pages, 9 photos, 3.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10036869&FileExtension=pdf&FileName=WPR19MA177%20-%20Ops%20Factual%20(FINAL)-Rel.pdf
- Operations attachment 1 - interview summaries (item 4, PDF, 19 pages, 444 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10037724&FileExtension=pdf&FileName=Attachment%201%20-%20Interview%20Summaries%20(FINAL)-Rel.pdf
- Operations attachment 2 - records of conversation (item 5, PDF, 27 pages, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10039160&FileExtension=pdf&FileName=Attachment%202%20-%20Records%20of%20Conversation%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 3 - pilot information (item 6, PDF, 23 pages, 854 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10031218&FileExtension=pdf&FileName=Attachment%203%20-%20Pilot%20Information%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 4 - pilot's opc training record (item 7, PDF, 2 pages, 920 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964647&FileExtension=pdf&FileName=Attachment%204%20-%20Pilot%27s%20OPC%20Training%20Record%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 5 - NTSB letter and subpoena to pilota��s instructor (item 8, PDF, 6 pages, 219 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964747&FileExtension=pdf&FileName=Attachment%205%20-%20NTSB%20Letter%20and%20Subpoena%20to%20Pilot%E2%80%99s%20Instructor%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 6 - pilot logbook (item 9, PDF, 39 pages, 76 photos, 103 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964827&FileExtension=pdf&FileName=Attachment%206%20-%20Pilot%20Logbook%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 7 - advisory circular 105-2E (item 10, PDF, 32 pages, 870 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964395&FileExtension=pdf&FileName=Attachment%207%20-%20Advisory%20Circular%20105-2E%20(FINAL)-Rel.pdf
- Operations attachment 8 - N256TA FAA records (item 11, PDF, 29 pages, 26.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964756&FileExtension=pdf&FileName=Attachment%208%20-%20N256TA%20FAA%20Records%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 9 - N256TA lease and insurance (item 12, PDF, 13 pages, 949 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9963622&FileExtension=pdf&FileName=Attachment%209%20-%20N256TA%20Lease%20and%20Insurance%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 10 - Beech A90 door-removed procedures (item 13, PDF, 3 pages, 238 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964990&FileExtension=pdf&FileName=Attachment%2010%20-%20Beech%20A90%20Door-removed%20Procedures%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 11 - weight and balance (item 14, PDF, 5 pages, 4 photos, 2.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964495&FileExtension=pdf&FileName=Attachment%2011%20-%20Weight%20and%20Balance%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 12 - dillingham airfield FAA information (item 15, PDF, 2 pages, 318 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9965121&FileExtension=pdf&FileName=Attachment%2012%20-%20Dillingham%20Airfield%20FAA%20Information%20(FINAL)-Rel.pdf
- Operations attachment 13 - previous flight witness statements (item 16, PDF, 11 pages, 1 photo, 310 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9963631&FileExtension=pdf&FileName=Attachment%2013%20-%20Previous%20Flight%20Witness%20Statements%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 14 - Hawaii dot documents (item 17, PDF, 22 pages, 3.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964937&FileExtension=pdf&FileName=Attachment%2014%20-%20Hawaii%20DOT%20Documents%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 15 - fsaw bulletin 93-09 (item 18, PDF, 3 pages, 104 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964765&FileExtension=pdf&FileName=Attachment%2015%20-%20FSAW%20Bulletin%2093-09%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 16 - Beech A90 normal procedures (item 19, PDF, 8 pages, 716 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964999&FileExtension=pdf&FileName=Attachment%2016%20-%20Beech%20A90%20Normal%20Procedures%20(FINAL)-Rel.pdf
- Operations attachment 17 - Beech A90 emergency procedures (item 20, PDF, 9 pages, 779 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964444&FileExtension=pdf&FileName=Attachment%2017%20-%20Beech%20A90%20Emergency%20Procedures%20(FINAL)-Rel.pdf
- Operations attachment 18 - Beech A90 engine limitations (item 21, PDF, 2 pages, 176 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9965138&FileExtension=pdf&FileName=Attachment%2018%20-%20Beech%20A90%20Engine%20Limitations%20(FINAL)-Rel.pdf
- Operations attachment 19 - Beech A90 stall speeds (item 22, PDF, 2 pages, 316 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9964946&FileExtension=pdf&FileName=Attachment%2019%20-%20Beech%20A90%20Stall%20Speeds%20(FINAL)-Rel.pdf
- Operations attachment 20 - FAA surveillance of sport parachute activities (item 23, PDF, 8 pages, 221 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9965147&FileExtension=pdf&FileName=Attachment%2020%20-%20FAA%20Surveillance%20of%20Sport%20Parachute%20Activities%20(FINAL)-Rel.pdf
- Operations attachment 21 - evidence control forms (item 24, PDF, 2 pages, 161 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9965008&FileExtension=pdf&FileName=Attachment%2021%20-%20Evidence%20Control%20Forms%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 22 - opc Hawaii records (item 25, PDF, 5 pages, 271 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9965449&FileExtension=pdf&FileName=Attachment%2022%20-%20OPC%20Hawaii%20Records%20(FINAL)_Redacted-Rel.pdf
- Operations attachment 23 - flying for skydive operations - p- 8740-62 (item 26, PDF, 7 pages, 140 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9966491&FileExtension=pdf&FileName=Attachment%2023%20-%20Flying%20for%20Skydive%20Operations%20%E2%80%93%20P-%208740-62%20(FINAL)-Rel.pdf
- Operations attachment 24 - FAA legal interpretations (item 27, PDF, 4 pages, 472 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9966252&FileExtension=pdf&FileName=Attachment%2024%20-%20FAA%20Legal%20Interpretations%20(FINAL)_Redacted-Rel.pdf
- Operations addendum 1 - instructor records (item 28, PDF, 18 pages, 4.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9965458&FileExtension=pdf&FileName=Addendum%201%20-%20Instructor%20Records_Redacted-Rel.pdf
- Operations addendum 2 - FAA CFI pass_fail statistics (item 29, PDF, 3 pages, 100 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9966343&FileExtension=pdf&FileName=Addendum%202%20-%20FAA%20CFI%20Pass_Fail%20Statistics_Redacted-Rel.pdf
- Electronic devices - specialist's factual report (item 30, PDF, 5 pages, 8 photos, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9157545&FileExtension=pdf&FileName=final_factual_WPR19MA177-Rel.pdf
- Electronic devices - attachment 1 (suny SD card analysis) (item 31, PDF, 34 pages, 34 photos, 4.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9157255&FileExtension=pdf&FileName=WPR19MA177_SUNY_Report-Rel.pdf
- Maintenance records factual report (item 32, PDF, 82 pages, 492 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9408277&FileExtension=pdf&FileName=Maintenance%20Factual_Redacted-Rel.pdf
- Powerplants group chairman's factual report (item 33, PDF, 88 pages, 124 photos, 6.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9512585&FileExtension=pdf&FileName=KingAir%20Hawaii%20PP%20factual%20report%20final-Rel.pdf
- Systems and structures group chairman's factual report (item 34, PDF, 82 pages, 99 photos, 18.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9984701&FileExtension=pdf&FileName=N256TA%20Factual%20Struc%20Sys%2010Apr2020-Rel.pdf
- Systems and structures group chairman's factual report - errata 1 (item 35, PDF, 2 pages, 103 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11914381&FileExtension=pdf&FileName=N256TA%20Factual%20Struc%20Sys%20-%20Errata%201-Rel.pdf
- Systems and structures group chairman's factual report - addendum 1 (item 36, PDF, 2 pages, 1 photo, 471 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11919616&FileExtension=pdf&FileName=N256TA%20Factual%20Struc%20Sys%20-%20Addendum%201-Rel.pdf
- NTSB - adopted board report - safety recommendation report ASR-20-06 (item 37, PDF, 5 pages, 253 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11800578&FileExtension=pdf&FileName=ASR2006-Rel.pdf
- Airplane performance study (item 38, PDF, 17 pages, 2.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10002355&FileExtension=pdf&FileName=WPR19MA177_airplane_performance_study_v7-Rel.pdf
- Restraint system factual report (item 39, PDF, 9 pages, 2.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11389389&FileExtension=pdf&FileName=FINAL%20Restraint%20Factual%20Report-WPR19MA177-1.3-Rel.pdf
- Restraint system factual report - attachement 1 (item 40, PDF, 7 pages, 10.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11389308&FileExtension=pdf&FileName=r_Attachment%201-Rel.pdf
- Restraint system factual report - attachement 2 (item 41, PDF, 4 pages, 214 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11389226&FileExtension=pdf&FileName=Attachment%202-Rel.pdf
- Toxicological report - pilot (item 42, PDF, 1 page, 506 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9965962&FileExtension=pdf&FileName=Pilot%20Toxicology%20Report%20-%20Redacted-Rel.pdf
- Video study (item 43, PDF, 7 pages, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9648688&FileExtension=pdf&FileName=Mokuleia_Video_Study_final-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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