# NTSB LAX03MA292: Aerospatiale AS350BA, N270SH, GrandCanyonWest, AZ, September 20, 2003

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Class 1 · Major · Final report
- Date: September 20, 2003, 12:38 local (19:38 UTC)
- Place: GrandCanyonWest, AZ
- Coordinates: 35.985, -113.793334
- Nearby events: https://openairdocs.org/map.md?lat=35.9850&lon=-113.7933&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 7 fatal
- Status: Completed, report November 14, 2007
- Report: Board-adopted at Board Meeting
- Investigation class: Class 1
- Parties: Federal Aviation Administration, American Eurocopter, Sundance Helicopters, Inc., Honeywell
- Safety recommendations: Yes
- NTSB case key (mKey): 57969
- NTSB case page: https://www.ntsb.gov/investigations/Pages/LAX03MA292.aspx
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/57969/pdf
- Board report AAB0703 (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/AAB0703.pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=57969
- Page: https://openairdocs.org/ntsb/LAX03MA292

## Probable cause

The pilot's disregard of safe flying procedures and misjudgment of the helicopter's proximity to terrain, which resulted in an in-flight collision with a canyon wall. Contributing to the accident was the failure of Sundance Helicopters and the Federal Aviation Administration to provide adequate surveillance of Sundance's air tour operations in Descent Canyon.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight collision with terrain/water, maneuvering
  - in-flight planning/decision - poor, pilot in command (contributing factor)
  - terrain condition - mountainous/hilly
  - clearance - not maintained, pilot in command (cause)
  - procedure inadequate, pilot in command (cause)
  - low altitude flight/maneuver - intentional, pilot in command (cause)
  - inadequate surveillance of operation, company/operator mgmt (contributing factor)
  - inadequate surveillance of operation, faa(organization) (contributing factor)

## Analysis

The Safety Board's full report is available at http://www.ntsb.gov/publictn/publictn.htm. The Aircraft Accident Brief number is NTSB/AAB-07/03.

On September 20, 2003, about 1238 mountain standard time, an Aerospatiale AS350BA helicopter, N270SH, operated by Sundance Helicopters, Inc., crashed into a canyon wall while maneuvering through Descent Canyon, about 1.5 nautical miles east of Grand Canyon West Airport (1G4) in Arizona. The pilot and all six passengers on board were killed, and the helicopter was destroyed by impact forces and postcrash fire. The air tour sightseeing flight was operated under the provisions of 14 Code of Federal Regulations Part 135. Visual meteorological conditions prevailed for the flight, which was operated under visual flight rules on a company flight plan. The helicopter was transporting passengers from a helipad at 1G4 (helipad elevation 4,775 feet mean sea level [msl]) near the upper rim of the Grand Canyon to a helipad designated "the Beach" (elevation 1,300 msl) located next to the Colorado River at the floor of the Grand Canyon.

## Factual narrative

The Safety Board's full report is available at http://www.ntsb.gov/publictn/publictn.htm. The Aircraft Accident Brief number is NTSB/AAB-07/03.

On September 20, 2003, about 1238 mountain standard time, an Aerospatiale AS350BA helicopter, N270SH, operated by Sundance Helicopters, Inc., crashed into a canyon wall while maneuvering through Descent Canyon, about 1.5 nautical miles east of Grand Canyon West Airport (1G4) in Arizona. The pilot and all six passengers on board were killed, and the helicopter was destroyed by impact forces and postcrash fire. The air tour sightseeing flight was operated under the provisions of 14 Code of Federal Regulations Part 135. Visual meteorological conditions prevailed for the flight, which was operated under visual flight rules on a company flight plan. The helicopter was transporting passengers from a helipad at 1G4 (helipad elevation 4,775 feet mean sea level [msl]) near the upper rim of the Grand Canyon to a helipad designated "the Beach" (elevation 1,300 msl) located next to the Colorado River at the floor of the Grand Canyon.

The director of operations estimated that each flight from 1G4 to the Beach helipad lasted about 3.5 minutes. These flights were part of an advertised tour package in which Sundance pilots flew passengers through Descent Canyon, dropped them off at the Beach helipad for a scenic boat ride on the Colorado River, then picked them up at the Beach helipad later in the day for a return flight to 1G4 through another scenic canyon.

The accident flight was the pilot's 11th flight through Descent Canyon that day. The helicopter lifted off from 1G4 about 1237 and flew to the rim of Descent Canyon. The Sundance tour coordinator and a loader for Papillon Grand Canyon Helicopters at 1G4 stated that they observed the accident helicopter hover at the rim of Descent Canyon for about 30 to 45 seconds before beginning a level descent. There were no known witnesses or air traffic control radar data to provide information on the accident flight's progress inside the canyon after it descended out of view of the witnesses at 1G4.

The main wreckage was located on a canyon wall ledge about 400 feet beyond a near-vertical canyon wall that showed evidence of gouging consistent with a main rotor blade strike.

## Aircraft

- Registration: [N270SH](https://openairdocs.org/deregistered/N270SH-2006-06-01), registration cancelled 2006-06-01, S/N 1864, built 1985 (OpenAirDocs)
- Reported make and model: Aerospatiale AS350BA
- Registry model: [Aerospatiale AS350BA](https://openairdocs.org/model/aerospatiale-as350ba) (registry code 8680817) (OpenAirDocs)
- Registry engine: [Turbomeca ARRIEL-1SER](https://openairdocs.org/engine/turbomeca-arriel-1ser) (registry code 60030, turbo-shaft) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1864
- Airframe hours: 10892
- Engines: Lycoming LTS101-600A3A 650 horsepower turbo shaft
- Damage: Destroyed
- Fire: On-Ground
- Flight: Part 135
- Registered owner: Sundance Helicopters, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, September 3, 2003, 95 hours before
- Departed: 1G4, GrandCanyonWest, AZ
- Destination: NONE, Descent Canyon, AZ
- Flight plan: Company VFR
- Airport: 1G4, Grand Canyon West

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; injuries: fatal; flight instructor, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: helicopter, airplane; medical: class 1, valid medical--no waivers/lim.; last flight review July 1, 2003; seat: right; toxicology performed; flight hours: 7,857 total, 2,350 in this make and model, 7,762 as pilot in command, 228 in the last 90 days, 86 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 350° at 4 knots, gusting 14
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 90 °F, dew point 21 °F
- Altimeter: 29.95 inHg
- Observed at: IGM, 44 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 20030920037859A](https://openairdocs.org/incident/20030920037859A), Sep 20, 2003: Snias AS350BA, Grandcanyonwes, AZ, Destroyed, 7 fatal. (-23) On September 20, 2003, at 1238 mountain standard time, an aerospatiale AS350BA, N270SH, collided with a canyon wall during a descent into descent canyon,…

## Docket (87 files)

The files NTSB released with the investigation on October 25, 2007, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=57969. 105 MB in all.

- Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 389 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40229535&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF
- Operations - Factual Report of Group Chairman (item 2, .PDF, 332 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257113&FileExtension=.PDF&FileName=Operations%20-%20Factual%20Report%20of%20Group%20Chairman-Redacted.PDF
- Operations - Attachment A - Operations Specifications, Sundance Helicopters (SH) (item 3, .PDF, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257133&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20A%20-%20Operations%20Specifications,%20Sundance%20Helicopters%20(SH)-Redacted.PDF
- Operations - Attachment B - Sundance Helicopters, Inc., Part 135 Operations Manual (item 4, .PDF, 7.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257114&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20B%20-%20Sundance%20Helicopters,%20Inc.,%20Part%20135%20Operations%20Manual-Redacted.PDF
- Operations - Attachment C - Sundance Helicopters FAA approved Training Program for Part 135 Operations (item 5, .PDF, 4.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257115&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20C%20-%20Sundance%20Helicopters%20FAA%20approved%20Training%20Program%20for%20Part%20135%20Operations-Redacted.PDF
- Operations - Attachment D - Sundance Helicopters Operations Memorandum, October 10, 2000, Grand Canyon West Procedures (item 6, .PDF, 215 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257129&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20D%20-%20Sundance%20Helicopters%20Operations%20Memorandum,%20October%2010,%202000,%20Grand%20Canyon%20West%20Procedures-Master.PDF
- Operations - Attachment E - Training Curriculum, Sundance Helicopters (item 7, .PDF, 434 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217027&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20E%20-%20Training%20Curriculum,%20Sundance%20Helicopters-Master.PDF
- Operations - Addendum F - LAS FSDO Grand Canyon National Park Special Flight Rules Area (GCNP SFRA) Procedures Manual (item 8, .PDF, 3.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217028&FileExtension=.PDF&FileName=Operations%20-%20Addendum%20F%20-%20LAS%20FSDO%20Grand%20Canyon%20National%20Park%20Special%20Flight%20Rules%20Area%20(GCNP%20SFRA)%20Procedures%20Manual-Master.PDF
- Operations - Attachment G - Operations Memorandum, February 19, 2001, Operations at Grand Canyon West (item 9, .PDF, 37 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217029&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20G%20-%20Operations%20Memorandum,%20February%2019,%202001,%20Operations%20at%20Grand%20Canyon%20West-Master.PDF
- Operations - Attachment H - Operations Memorandum, June 15, 2000, Jack stall and Airspeed (item 10, .PDF, 132 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217030&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20H%20-%20Operations%20Memorandum,%20June%2015,%202000,%20Jack%20stall%20and%20Airspeed-Master.PDF
- Operations - Attachment I - Emergency Procedures, 350 BA Flight Manual (item 11, .PDF, 338 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217031&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20I%20-%20Emergency%20Procedures,%20350%20BA%20Flight%20Manual-Master.PDF
- Operations - Attachment J - Operations Memorandum, October 1, 2000, 1G4 Operations [deleted] (item 12, .PDF, 8 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257136&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20J%20-%20Operations%20Memorandum,%20October%201,%202000,%201G4%20Operations%20%20%5Bdeleted%5D-Master.PDF
- Operations - Attachment K - Topo maps, 1G4, Descent Canyon Tour Route in Effect & Revised Route (item 13, .PDF, 7.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217335&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20K%20-%20Topo%20maps,%201G4,%20Descent%20Canyon%20Tour%20Route%20in%20Effect%20%26%20Revised%20Route-Master.PDF
- Operations - Attachment L - Sundance Helicopters, Pilot Flight Duty Record (item 14, .PDF, 762 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217033&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20L%20-%20Sundance%20Helicopters,%20Pilot%20Flight%20Duty%20Record-Master.PDF
- Operations - Attachment M - Records for Mr. Mezaki, provided by SH relative to Pilot Records Improvement Act of 1996 (item 15, .PDF, 597 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257116&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20M%20-%20Records%20for%20Mr.%20Mezaki,%20provided%20by%20SH%20relative%20to%20Pilot%20Records%20Improvement%20Act%20of%201996-Redacted.PDF
- Operations - Attachment N.1 - Sundance Helicopters Aircraft Weight and Balance: estimated for N270SH for time of the accident (item 16, .PDF, 46 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414573&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20N.1%20-%20Sundance%20Helicopters%20Aircraft%20Weight%20and%20Balance%3A%20estimated%20for%20N270SH%20for%20time%20of%20the%20accident-Redacted.PDF
- Operations - Attachment N.2 - Sundance Helicopters Aircraft Weight and Balance: SH's filed weight and balance records for N270SH (item 17, .PDF, 178 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257117&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20N.2%20-%20Sundance%20Helicopters%20Aircraft%20Weight%20and%20Balance%3A%20SH%27s%20filed%20weight%20and%20balance%20records%20for%20N270SH-Redacted.PDF
- Operations - Attachment O - Sundance Helicopters, Fuel Sample Log, dated 9/20/03 (item 18, .PDF, 44 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217037&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20O%20-%20Sundance%20Helicopters,%20Fuel%20Sample%20Log,%20dated%209%2F20%2F03-Master.PDF
- Operations - Attachment P - 1G4 Passenger Manifest, 9/20/03 and sheet sketching locations of passengers on the accident flight provided by Ms. Springgate-Hill (item 19, .PDF, 123 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257118&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20P%20-%201G4%20Passenger%20Manifest,%209%2F20%2F03%20and%20sheet%20sketching%20locations%20of%20passengers%20on%20the%20accident%20flight%20provided%20by%20Ms.%20Springgate-Hill-Redacted.PDF
- Operations - Attachment Q - Sundance Helicopters, Minimum Equipment List, AS-350 (item 20, .PDF, 1.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257119&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20Q%20-%20Sundance%20Helicopters,%20Minimum%20Equipment%20List,%20AS-350-Redacted.PDF
- Operations - Attachment R - Passenger Briefing Cards in English, German and Japanese - "Hotloads" (item 21, .PDF, 518 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217040&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20R%20-%20Passenger%20Briefing%20Cards%20in%20English,%20German%20and%20Japanese%20-%20%22Hotloads%22-Master.PDF
- Operations - Attachment S - Secondary file for Accident pilot regarding dangerous flight on June 1, 2001 (item 22, .PDF, 3.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414574&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20S%20-%20Secondary%20file%20for%20Accident%20pilot%20regarding%20dangerous%20flight%20on%20June%201,%202001-Redacted.PDF
- Operations - Attachment T - Air Vegas Passenger/Cargo Manifest Forms, Passenger Information and Correspondence between NTSB and SH (item 23, .PDF, 501 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414575&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20T%20-%20Air%20Vegas%20Passenger%2FCargo%20Manifest%20Forms,%20Passenger%20Information%20and%20Correspondence%20between%20NTSB%20and%20SH-Redacted.PDF
- Operations - Attachment U - Sequence of flights and SH flight numbers and down and up times (item 24, .PDF, 65 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217043&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20U%20-%20Sequence%20of%20flights%20and%20SH%20flight%20numbers%20and%20down%20and%20up%20times-Master.PDF
- Operations - Attachment V - Sundance Helicopters - Training Program records for accident pilot (item 25, .PDF, 2.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257122&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20V%20-%20Sundance%20Helicopters%20-%20Training%20Program%20records%20for%20accident%20pilot-Redacted.PDF
- Operations - Attachment W - Weather Report, Las Vegas 9/20/2003 (item 26, .PDF, 43 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217046&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20W%20-%20Weather%20Report,%20Las%20Vegas%209%2F20%2F2003-Master.PDF
- Operations - Attachment X - Tour-related brochures for Sundance Helicopters and Air Vegas Airlines (item 27, .PDF, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257137&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20X%20-%20Tour-related%20brochures%20for%20Sundance%20Helicopters%20and%20Air%20Vegas%20Airlines-Master.PDF
- Operations - Attachment Y - Interview Summary Statement of John Sullivan - CEO of Sundance Helicopters (item 28, .PDF, 94 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257152&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20Y%20-%20Interview%20Summary%20Statement%20of%20John%20Sullivan%20-%20CEO%20of%20Sundance%20Helicopters-Master.PDF
- Operations - Attachment Z - Letter from NTSB Ops. Group Chairman to Ms. Roxanne Velez dated January 29, 2004 (item 29, .PDF, 71 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414576&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20Z%20-%20Letter%20from%20NTSB%20Ops.%20Group%20Chairman%20to%20Ms.%20Roxanne%20Velez%20dated%20January%2029,%202004-Redacted.PDF
- Operations - Attachment AA - Email from SH, Tom Schaus to NTSB Ops. Group Chairman regarding suspension of Mr. Mezaki (item 30, .PDF, 43 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414577&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20AA%20-%20Email%20from%20SH,%20Tom%20Schaus%20to%20NTSB%20Ops.%20Group%20Chairman%20regarding%20suspension%20of%20Mr.%20Mezaki-Redacted.PDF
- Operations - Attachment BB - Statement of SH employee Paul Kirschel regarding maintenance (item 31, .PDF, 74 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217055&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20BB%20-%20Statement%20of%20SH%20employee%20Paul%20Kirschel%20regarding%20maintenance-Master.PDF
- Operations - Attachment CC - DOD Capability Survey of Sundance Helicopters, Inc., October 28, 2003 (item 32, .PDF, 1.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257124&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20CC%20-%20DOD%20Capability%20Survey%20of%20Sundance%20Helicopters,%20Inc.,%20October%2028,%202003-Redacted.PDF
- Operations - Attachment DD - Accident pilot's logbook entries, May 27, 2001, through October 1, 2001 (item 33, .PDF, 4.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217057&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20DD%20-%20Accident%20pilot%27s%20logbook%20entries,%20May%2027,%202001,%20%20through%20October%201,%202001-Master.PDF
- Operations - Attachment EE - FAA Information AirNav.Com, "1G4 Grand Canyon West Airport, Peach Springs, Arizona, USA" (item 34, .PDF, 132 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40217058&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20EE%20-%20FAA%20Information%20AirNav.Com,%20%221G4%20Grand%20Canyon%20West%20Airport,%20Peach%20Springs,%20Arizona,%20USA%22-Master.PDF
- Operations - Attachment FF - Witness Summaries (item 35, .PDF, 154 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257069&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20FF%20-%20Witness%20Summaries-Master.PDF
- Operations - Attachment GG - Memo from AFS-1 to AAI-1 in response to NTSB IIC's information request, May 18, 2004 (item 36, .PDF, 86 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414578&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20GG%20-%20Memo%20from%20AFS-1%20to%20AAI-1%20in%20response%20to%20NTSB%20IIC%27s%20information%20request,%20May%2018,%202004-Redacted.PDF
- Operations - Attachment HH - National Flight Standards Work Program Guidelines FAA Order 1800.56A August 7, 2000; Order 1800.56A Chg 1 March 15, 2001; Order 1800.56B Sept 14, 2001; Order 1800.56C Sept 13, 2002; Order 1800.56D Sept 17, 2003 (item 37, .PDF, 5.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40222748&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20HH%20-%20National%20Flight%20Standards%20Work%20Program%20Guidelines%20FAA%20Order%201800.56A%20%20August%207,%202000;%20Order%201800.56A%20Chg%201%20March%2015,%202001;%20Order%201800.56B%20Sept%2014,%202001;%20Order%201800.56C%20Sept%2013,%202002;%20Order%201800.56D%20Sept%2017,%202003-Master.PDF
- Operations - Attachment II - Email TR Proven, FAA IIC, showing example of FAA’s tabulated data of Sundance’s flight activity, dated September 29, 2003 (item 38, .PDF, 84 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40222719&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20II%20-%20Email%20TR%20Proven,%20FAA%20IIC,%20showing%20example%20of%20FAA%E2%80%99s%20tabulated%20data%20of%20Sundance%E2%80%99s%20flight%20activity,%20dated%20September%2029,%202003-Master.PDF
- Operations - Attachment JJ - Email from NTSB IIC to FAA POI, regarding PTRS, dated October 2, 2003 (item 39, .PDF, 24 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40227253&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20JJ%20-%20Email%20from%20NTSB%20IIC%20to%20FAA%20POI,%20regarding%20PTRS,%20dated%20October%202,%202003-Redacted.PDF
- Operations - Attachment KK - Statement of FAA POI, dated October 1, 2003 (item 40, .PDF, 88 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40222726&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20KK%20-%20Statement%20of%20FAA%20POI,%20dated%20October%201,%202003-Master.PDF
- Operations - Attachment LL - Statement of FAA APOI, dated September 26, 2003 (item 41, .PDF, 66 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40225595&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20LL%20-%20Statement%20of%20FAA%20APOI,%20dated%20September%2026,%202003-Master.PDF
- Operations - Attachment MM - TOPS program brochure, extract received from Sundance, September 2003 (item 42, .PDF, 337 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40222728&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20MM%20-%20TOPS%20program%20brochure,%20extract%20received%20from%20Sundance,%20September%202003-Master.PDF
- Operations - Attachment NN - TOPS program directive, received from Sundance, dated April 30, 1996 (item 43, .PDF, 371 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40222729&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20NN%20-%20TOPS%20program%20directive,%20received%20from%20Sundance,%20dated%20April%2030,%201996-Master.PDF
- Operations - Attachment OO - Sundance Operations memo regarding Jack Stall and Airspeed, dated June 15, 2000 (item 44, .PDF, 45 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40222730&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20OO%20-%20Sundance%20Operations%20memo%20regarding%20Jack%20Stall%20and%20Airspeed,%20dated%20June%2015,%202000-Master.PDF
- Operations - Attachment PP - Sundance Chief Pilot memo regarding diving into Descent Canyon and TOPS standards, dated February 19, 2001 (item 45, .PDF, 35 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40222731&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20PP%20-%20Sundance%20Chief%20Pilot%20memo%20regarding%20diving%20into%20Descent%20Canyon%20and%20TOPS%20standards,%20dated%20February%2019,%202001-Master.PDF
- Operations - Attachment QQ - TOPS Operational Safety Audit for Sundance, dated July 16, 2003 (item 46, .PDF, 308 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40227383&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20QQ%20-%20TOPS%20Operational%20Safety%20Audit%20for%20Sundance,%20dated%20July%2016,%202003-Redacted.PDF
- Operations - Attachment RR - TOPS audit form for Sundance, dated July 16, 2003 (item 47, .PDF, 847 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40222733&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20RR%20-%20TOPS%20audit%20form%20for%20Sundance,%20dated%20July%2016,%202003-Master.PDF
- Operations - Attachment SS - Email from B. Fahnestock, Sundance Director of Maintenance, to NTSB Airworthiness Group Chair Deforge, dated September 29, 2003. (item 48, .PDF, 13 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40227382&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20SS%20-%20Email%20from%20B.%20Fahnestock,%20Sundance%20Director%20of%20Maintenance,%20to%20NTSB%20Airworthiness%20Group%20Chair%20Deforge,%20dated%20September%2029,%202003.-Redacted.PDF
- Operations - Attachment TT - Descent Canyon Flight Frequency (item 49, .PDF, 24 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40222741&FileExtension=.PDF&FileName=Operations%20-%20Attachment%20TT%20-%20Descent%20Canyon%20Flight%20Frequency-Master.PDF
- Operations, Memo Documentation of Descent Canyon Topography and Impact Signatures w/photos (item 50, .PDF, 927 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40229499&FileExtension=.PDF&FileName=Operations,%20Memo%20Documentation%20of%20Descent%20Canyon%20Topography%20and%20Impact%20Signatures%20w%2Fphotos-Master.PDF
- Operations, Memo Attachment 1, Documentation Flight Video (item 51, .PDF, 8 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257103&FileExtension=.PDF&FileName=Operations,%20Memo%20Attachment%201,%20Documentation%20Flight%20Video-Master.PDF
- Operations, Memo Attachment 2, Documentation Photographs (item 52, .PDF, 18 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257148&FileExtension=.PDF&FileName=Operations,%20Memo%20Attachment%202,%20Documentation%20Photographs-Master.PDF
- Operations, Memo Attachment 3, Documentation GPS Track Plot (item 53, .PDF, 844 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40216907&FileExtension=.PDF&FileName=Operations,%20Memo%20Attachment%203,%20Documentation%20GPS%20Track%20Plot-Master.PDF
- Airworthiness - Factual Report of Group Chairman (item 54, .PDF, 10 photos, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40227628&FileExtension=.PDF&FileName=Airworthiness%20-%20Factual%20Report%20of%20Group%20Chairman-Master.PDF
- Airworthiness - Factual Report, Attachment 1. Honeywell Engine Teardown Report (item 55, .PDF, 112 photos, 27.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40227267&FileExtension=.PDF&FileName=Airworthiness%20-%20Factual%20Report,%20Attachment%201.%20%20Honeywell%20Engine%20Teardown%20Report-Redacted.PDF
- Honeywell Engine Proprietary Release (item 56, .PDF, 23 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414579&FileExtension=.PDF&FileName=Honeywell%20Engine%20Proprietary%20Release-Redacted.PDF
- Passenger Interview Group Factual Report (item 57, .PDF, 73 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40212842&FileExtension=.PDF&FileName=Passenger%20Interview%20Group%20Factual%20Report-Master.PDF
- Passenger Interview Group Attachment 1 (item 58, .PDF, 879 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40230952&FileExtension=.PDF&FileName=Passenger%20Interview%20Group%20Attachment%201-Redacted.PDF
- Passenger Interview Group Attachment 2 (item 59, .PDF, 123 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40212845&FileExtension=.PDF&FileName=Passenger%20Interview%20Group%20Attachment%202-Master.PDF
- Servo Transparency Study (item 60, .PDF, 4.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257000&FileExtension=.PDF&FileName=Servo%20Transparency%20Study-Redacted.PDF
- Video Study (item 61, .PDF, 10 photos, 3.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40224128&FileExtension=.PDF&FileName=Video%20Study-Master.PDF
- Video Recording Available (personal recorder 1 year prior) (item 62, .PDF, 9 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257074&FileExtension=.PDF&FileName=Video%20Recording%20Available%20(personal%20recorder%201%20year%20prior)-Master.PDF
- Digital Camera - Special Study (item 63, .PDF, 3 photos, 486 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40215031&FileExtension=.PDF&FileName=Digital%20Camera%20-%20Special%20Study-Master.PDF
- Digital Camera - Study Attachment 1 (item 64, .PDF, 1.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40215033&FileExtension=.PDF&FileName=Digital%20Camera%20-%20Study%20Attachment%201-Master.PDF
- Digital Camera - Study Attachment 2 (item 65, .PDF, 1.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40215034&FileExtension=.PDF&FileName=Digital%20Camera%20-%20Study%20Attachment%202-Master.PDF
- Digital Camera - Study Attachment 3 (item 66, .PDF, 2.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40215035&FileExtension=.PDF&FileName=Digital%20Camera%20-%20Study%20Attachment%203-Master.PDF
- Digital Photograph - Special Study (item 67, .PDF, 8 photos, 3.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40215032&FileExtension=.PDF&FileName=Digital%20Photograph%20-%20Special%20Study-Master.PDF
- Digital Photograph - Study Attachment 1 (item 68, .PDF, 346 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40215036&FileExtension=.PDF&FileName=Digital%20Photograph%20-%20Study%20Attachment%201-Master.PDF
- Digital Photograph - Study Attachment 2 (item 69, .PDF, 344 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40215037&FileExtension=.PDF&FileName=Digital%20Photograph%20-%20Study%20Attachment%202-Master.PDF
- Digital Photograph - Study Attachment 3 (item 70, .PDF, 302 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40215038&FileExtension=.PDF&FileName=Digital%20Photograph%20-%20Study%20Attachment%203-Master.PDF
- Digital Photograph - Study Attachment 4 (item 71, .PDF, 354 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40215039&FileExtension=.PDF&FileName=Digital%20Photograph%20-%20Study%20Attachment%204-Master.PDF
- Digital Photograph - Study Attachment 5 (item 72, .PDF, 350 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40215040&FileExtension=.PDF&FileName=Digital%20Photograph%20-%20Study%20Attachment%205-Master.PDF
- Materials Laboratory - Factual Report #04-003, Failure Warning Panel Light Bulbs (item 73, .PDF, 474 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40208079&FileExtension=.PDF&FileName=Materials%20Laboratory%20-%20Factual%20Report%20%2304-003,%20Failure%20Warning%20Panel%20Light%20Bulbs-Master.PDF
- Materials Laboratory - Factual Report #04-004, Hydraulic Pump & Pulley Assembly (item 74, .PDF, 846 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40208757&FileExtension=.PDF&FileName=Materials%20Laboratory%20-%20Factual%20Report%20%2304-004,%20Hydraulic%20Pump%20%26%20Pulley%20Assembly-Master.PDF
- Toxicology Report (item 75, .PDF, 66 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257150&FileExtension=.PDF&FileName=Toxicology%20Report-Redacted.PDF
- Statement of Party Representatives to NTSB Investigation (item 76, .PDF, 336 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40229534&FileExtension=.PDF&FileName=Statement%20of%20Party%20Representatives%20to%20NTSB%20Investigation-Redacted.PDF
- Release of Aircraft Wreckage, NTSB Form 6120.15 (item 77, .PDF, 115 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257102&FileExtension=.PDF&FileName=Release%20of%20Aircraft%20Wreckage,%20NTSB%20Form%206120.15-Redacted.PDF
- Statement From Former Sundance Pilot (item 78, .PDF, 78 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257064&FileExtension=.PDF&FileName=Statement%20From%20Former%20Sundance%20Pilot-Redacted.PDF
- Sundance Report Regarding Passenger Photographs (item 79, .PDF, 82 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40257139&FileExtension=.PDF&FileName=Sundance%20Report%20Regarding%20Passenger%20Photographs-Master.PDF
- FAX Pollack, NTSB to Albert, TOPS (item 80, .PDF, 60 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414580&FileExtension=.PDF&FileName=FAX%20Pollack,%20NTSB%20to%20Albert,%20TOPS-Redacted.PDF
- Email Reply Albert, TOPS, to Pollack, NTSB (item 81, .PDF, 13 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40271917&FileExtension=.PDF&FileName=Email%20Reply%20Albert,%20TOPS,%20to%20Pollack,%20NTSB-Redacted.PDF
- Email, June 2006, Pollack to/from Sullivan, RE Route Check Policy (item 82, .PDF, 60 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414581&FileExtension=.PDF&FileName=Email,%20June%202006,%20Pollack%20to%2Ffrom%20Sullivan,%20RE%20Route%20Check%20Policy-Redacted.PDF
- Sundance Party Submission, per 49CFR831.14 (item 83, .PDF, 603 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40271950&FileExtension=.PDF&FileName=Sundance%20Party%20Submission,%20per%2049CFR831.14-Redacted.PDF
- Eurocopter Party Submission (item 84, .PDF, 508 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40278753&FileExtension=.PDF&FileName=Eurocopter%20Party%20Submission-Redacted.PDF
- Memo of June 4, 2007, Telecon Bet. Pollack and Barton, Sundance Director of Operations (item 85, .PDF, 36 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414582&FileExtension=.PDF&FileName=Memo%20of%20June%204,%202007,%20Telecon%20Bet.%20Pollack%20and%20Barton,%20Sundance%20Director%20of%20Operations-Redacted.PDF
- Email July 6, 2007, Sullivan to Pollack, RE Barton's June 4, 2007 interview (item 86, .PDF, 23 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40414583&FileExtension=.PDF&FileName=Email%20July%206,%202007,%20Sullivan%20to%20Pollack,%20RE%20Barton%27s%20June%204,%202007%20interview-Redacted.PDF
- Memo of July 13, 2007, Telecon Bet. Guzzetti & Butler, Ex. Director TOPS (item 87, .PDF, 26 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40280355&FileExtension=.PDF&FileName=Memo%20of%20July%2013,%202007,%20Telecon%20Bet.%20Guzzetti%20%26%20Butler,%20Ex.%20Director%20TOPS-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.

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