# NTSB LAX01GA291: Grumman TS-2A, N442DF, Hopland, CA, August 28, 2001

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Final report
- Date: August 27, 2001, 18:40 local (Aug 28, 2001, 01:40 UTC)
- Place: Hopland, CA
- Coordinates: 39.018054, -123.194168
- Nearby events: https://openairdocs.org/map.md?lat=39.0181&lon=-123.1942&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report September 13, 2005
- Report: Approved by Office Director
- Parties: San Jouquin Helicopters, California Department of Forestry
- NTSB case key (mKey): 53123
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX01GA291
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/53123/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=53123
- Page: https://openairdocs.org/ntsb/LAX01GA291

## Probable cause (aircraft 2)

the failure of both pilots to maintain an adequate visual lookout.  The failure of the pilot in Tanker 87 to comply with suggested procedures regarding positive radio contact and orbit entry was a factor.

## Sequence of events

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

- Midair collision, maneuvering
  - visual lookout - inadequate, pilots of both aircraft (cause)
  - procedures/directives - not complied with, pilot of other aircraft (contributing factor)
- Midair collision, maneuvering
  - visual lookout - inadequate, pilots of both aircraft (cause)
  - procedures/directives - not complied with, pilot in command (contributing factor)

## Analysis (aircraft 2)

During an aerial fire suppression mission for the California Department of Forestry (CDF), two Grumman TS-2A airplanes, operating as Tanker 92 (N442DF) and Tanker 87 (N450DF), collided in flight while in a holding pattern awaiting a retardant drop assignment on the fire.  All of the airplanes fighting the fire were TS-2A's, painted in identical paint schemes.  The Air Tactical Group Supervisor (AirTac) was orbiting clockwise 1,000 feet above the tankers, who were in a counterclockwise orbit at 3,000 feet mean sea level (msl).  The pilots of both aircraft involved in the collision had previously made several drops on the fire.  Records from the Air Tac show that Tankers 86, 91, and 92 were in orbit, and investigation found that Tanker 87 was inbound to enter the orbit after reloading at a nearby airport base.  AirTac would write down the tanker numbers as they made their 3-minutes-out call, and usually ordered their drops in the same order as their check-in.  The AirTac's log recorded the sequence 86, 91, 21, and 92.  The log did not contain an entry for Tanker 87.  Other pilots on frequency did not recall hearing Tanker 87 check in.  Based on clock codes with 12-o'clock being north, the tankers were in the following approximate positions of the orbit when the collision occurred.  Tanker 92 was at the 2-o'clock position; Tanker 86 was turning in at the 5-o'clock position; and Tanker 91 was in the 7-o'clock position.  The AirTac's log indicated that Tanker 92 was going to move up in sequence and follow Tanker 86 in order to drop immediately after him.  Post accident examination determined that Tanker 92's flaps were down, indicating that the pilot had configured the airplane for a drop.  Tanker 92 swung out of the orbit wide (in an area where ground witnesses had not seen tankers all day) to move behind Tanker 86, and the pilot would likely have been focusing on Tanker 86 out of his left side window.  Tanker 87 was on line direct to the center of the fire on a path that witnesses had not observed tankers use that day.  Reconstruction of the positions of the airplanes disclosed that Tankers 86 and 91 would have been directly in front of Tanker 87, and Tanker 92 would have been wide to his left.  Ground witnesses said that Tanker 87 had cleared a ridgeline just prior to the collision, and this ridgeline could have masked both collision aircraft from the visual perspective of the respective pilots.  The right propeller, engine, and cockpit of Tanker 92 contacted and separated the empennage of Tanker 87.  The propeller chop was about 47 degrees counterclockwise to the longitudinal axis of Tanker 87 as viewed from the top.  The collision appeared to have occurred about 2,500 feet, which was below orbit altitude.  CDF had no standard operating manual, no established reporting or entry point for the holding orbits, and a tanker could enter any point of the orbit from any direction.  While no standardized procedures were encoded in an operating manual,  a CDF training syllabus noted that a tanker was not to enter an orbit until establishing positive radio contact with the AirTac.  The entering tanker would approach 1,000 feet below AirTac's altitude and stay in a left orbit that was similar to a salad bowl, high and wide enough to see and clear all other tankers until locating the tanker that it was to follow, then adjust speed and altitude to fall in behind the preceding airplane.

## Factual narrative (aircraft 2)

1.1  HISTORY OF FLIGHT

On August 27, 2001, about 1840 Pacific daylight time, Tanker 87, a Grumman TS-2A, N450DF, collided with Tanker 92, a Grumman TS-2A, N442DF, near Hopland, California.  The California Department of Forestry (CDF) was operating the airplanes as public-use fire suppression flights under the provisions of 14 CFR Part 91.  Tanker 87's pilot held an airline transport pilot certificate; Tanker 92's pilot held an airline transport pilot certificate.  The collision sequence and post crash fires destroyed both airplanes.  Tanker 92 departed Ukiah, California, at 1830, and Tanker 87 departed Ukiah at 1834.  Visual meteorological conditions prevailed, and no flight plans had been filed.  The primary wreckage for Tanker 87 was at 39 degrees 00.878 minutes north latitude and 123 degrees 11.603 minutes west longitude, at an estimated elevation of 1,955 feet.  The primary wreckage for Tanker 92 was at 39 degrees 01.089 minutes north latitudeand  123 degrees 11.65 minutes west longitude, at an estimated elevation of 2,150 feet.

WITNESSES

1.1.1  AirTac

An airborne observer who was not a pilot served as the Air Tactical Group Supervisor (AirTac).  AirTac orbited the fire in a clockwise pattern about 2,000 feet above ground level (agl).  The tankers orbited in a counterclockwise pattern about 1,000 agl.  AirTac remained in contact with the incident commander on the ground, and directed the tanker drops on the fire.  AirTac directed the tankers on their drop order, and described the desired target point for the drop.

The first tankers arrived on scene prior to AirTac, and established a tanker pattern altitude of 3,000 feet mean sea level (msl).  AirTac arrived and began an orbit at 3,500 feet.  He moved up to 4,000 feet msl by the end of the day.  As tankers approached the scene, they made a 3-minutes-out call; if the frequency was congested, they made a 2-minute or 1-minute call.  Most tanker pilots reported that they made a direct path from Ukiah to the fire, and entered the orbit about 150 knots.  Several pilots noted that the air-to-air frequency was heavily congested.

AirTac said that three helicopters and eight tankers were working the fire.  Not all aircraft were on scene at the same time.  Tanker 92 had already made five drops, and Tanker 87 had already made six drops.  Tankers 92, 86, and 91 were in orbit.

Based on clock codes with 12-o'clock being north, the tankers were in the following approximate positions of the orbit when AirTac called Tanker 86 in to drop.  Tanker 92 was at the 2-o'clock position; Tanker 86 was turning in at the 5-o'clock position; and Tanker 91 was in the 7-o'clock position.  AirTac's log indicated that Tanker 92 was going to move up in sequence and follow Tanker 86 in order to drop immediately after him in what the tanker crews call a daisy chain.  The AirTac was heading westbound in the 6- to 7-o'clock position.

1.1.2  Tanker 86

As Tanker 86 set up to enter the drop pattern, he heard Tanker 92's pilot say that he had him in sight and was going to swing wide.  He assumed that Tanker 92's reference was to himself.  At this point, Tanker 86 was south of Bus McGall Peak and turning to the west about 2,500 feet msl.  During the left turn, the pilot of Tanker 86 reached up to prepare his airplane for the drop.  As he looked to his front right position, he observed the two airplanes collide.

1.1.3  Tanker 91

Tanker 91 departed runway 33 at Ukiah.  The pilot stated that he had just entered the orbit, and had not made a complete pattern.  Tanker 92 was physically ahead of Tanker 86 in the orbit.  He heard Tanker 92's pilot say: "I've got you in sight.  I'll go wide."  He initially thought that 92 was referring to Tanker 86, and swinging wide of the dropping tanker would be the proper thing to do.  However, he became unsure of whom 92's pilot was referencing since he now saw another tanker in Tanker 92's proximity.  Although Tanker 92 said that he was going wide, the airplane never went right.  It continued in a continuous left turn, like tankers always are.  Tanker 91 only saw the approaching tanker for about 5 to 6 seconds.  He did not see any evasive action.  The approaching tanker was either in a climb or pulled up a split second prior to the collision.

1.1.4  Tanker 21

The aircrew in Tanker 21 reported that they were coming from Medford, Oregon, and checked in over Lake Mendocino.  They fell about 2 miles in trail of Tanker 87 as it left Ukiah on a right downwind departure.  They followed it in a southerly direction along the hills east of the Ukiah valley, and as it turned to a southwesterly heading toward the fire.  As they headed toward the fire, the copilot said that AirTac was talking to Tanker 92 and explaining the drop.  To the copilot, this meant that Tanker 92 was preparing to drop.

Tanker 21's altitude was about 3,500 feet, and they estimated that Tanker 87 was at 3,000 feet or below.  Tanker 87 was entering the orbit directly toward the center of the fire rather than making a wide orbit.  They observed a second tanker approach from southeast to west.  The pilot estimated that the two airplanes were converging at a 60-degree angle.  The copilot said that Tanker 87 cleared a ridgeline, and pulled up just prior to impact.  He did not observe any avoidance maneuver by the westbound tanker, whose right wing was up.  They observed Tanker 87 continue in a southerly direction, and it rolled left.  The other tanker rolled 90 degrees wing low and nosed down about 60 degrees as it continued toward the west.

1.1.5  Ground Witness 1

A ground witness was on a promontory point observing the horizon to the west for signs of the fire.  This observation point was about 1,900 feet elevation and 1 mile east of the accident site.  This witness observed a tanker northwest of her position that was proceeding southbound on a track that she had observed other tankers use during the day.  As she looked back to the west, she observed another tanker south of her position that was proceeding in a westerly direction.  She had not seen a tanker in this area during the day.  She observed the tankers as they converged and collided.  The westbound tanker went under the southbound tanker.  She could see the top of Goat Rock (about 2,400 feet elevation) above the two airplanes.

1.1.6  Ground Witnesses 2, 3, and 4

Several ground witnesses (including the incident commander) were together at the edge of a meadow in a saddle (about 2,000 feet elevation) between Goat Rock and Bus McGall Peak (about 2,200 feet elevation and 1/2 mile southeast of Goat Rock).

The incident commander was also a relief air attack pilot.  He was facing east with maps on the hood of a car as he was briefing other ground commanders.  He looked east, and saw two tankers in the orbit; this was the orbit that he had been observing other airplanes use during the aerial firefight.  He estimated that the tanker farthest away was on a 45-degree angle from the closest airplane.  Based on his experience, he felt that the airplane on the inside was preparing to make a drop.  He felt that the pilot of the far airplane was watching the closer airplane so that the far pilot would know where to drop.  He thought that the far airplane was in a slight left turn.  With his peripheral vision, he detected a third airplane.  All three airplanes appeared to be about the same altitude.  He estimated that the airplanes were only a few hundred feet away horizontally, and several hundred feet vertically from his location.  He had not seen an airplane enter the pattern at the third airplane's location.  Most pilots entered a wide pattern north of Goat Rock and gradually tightened their radius as they descended into the orbit.  He expected the pilot of the third airplane to make a hard right to enter the left orbit; however, it did not.

All of the witnesses in the saddle observed the southbound tanker heading straight for them, and then ob

## Aircraft 1

- Registration: [N442DF](https://openairdocs.org/deregistered/N442DF-2002-02-05), registration cancelled 2002-02-05, S/N 255 (OpenAirDocs)
- Reported make and model: Grumman TS-2A
- Registry model: [Grumman S2F-1](https://openairdocs.org/model/grumman-s2f-1) (registry code 3951008) (OpenAirDocs)
- Category: Airplane
- Serial number: 255
- Airframe hours: 9868
- Engines: Curtis-Wright R1820-82B reciprocating; Curtis Wright R1820-82B 1200 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Public aircraft, Public use
- Registered owner: California Department Of Forestry
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Continuous airworthiness, August 23, 2001, 8 hours before
- Departed: UKI, UKIAH, CA

## Aircraft 2

- Registration: [N450DF](https://openairdocs.org/deregistered/N450DF-2002-02-05), registration cancelled 2002-02-05, S/N 421, built 1953 (OpenAirDocs)
- Reported make and model: Grumman TS-2A
- Registry model: [Grumman S2F-1 (TS-2A)](https://openairdocs.org/model/grumman-s2f-1-ts-2a) (registry code 3951102) (OpenAirDocs)
- Registry engine: [Wright R-1820 series](https://openairdocs.org/engine/wright-r-1820-series) (registry code 67020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 421
- Airframe hours: 10354
- Engines: Curtis Wright R1820-82B 1200 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Public aircraft, Part 91
- Registered owner: California Department Of Forestry
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Continuous airworthiness, August 21, 2001, 8 hours before
- Departed: UKI, UKIAH, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot, aircraft N442DF; age 45; injuries: fatal; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; last flight review May 1, 2001; seat: left; toxicology performed; flight hours: 12,725 total, 340 in this make and model, 2 in the last 24 hours
- Pilot, aircraft N450DF; age 55; injuries: fatal; airline transport, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; last flight review May 1, 2000; seat: left; toxicology performed; flight hours: 4,639 total, 1,294 in this make and model, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 340° at 9 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 86 °F, dew point 43 °F
- Altimeter: 29.87 inHg
- Observed at: UKI

## 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 20010827029651A](https://openairdocs.org/incident/20010827029651A), Aug 27, 2001: Grumav TS2A, Hopland, CA, No damage, 1 fatal. (-23) See NTSB report LAX01GA291A. (.19) on August 27, 2001, about 1840 hours pacific daylight time, tanker 87, a Grumman TS-2A, N450DF, collided with tanker…
- [Accident 20010827029652A](https://openairdocs.org/incident/20010827029652A), Aug 27, 2001: Grumav TS2A, Hopland, CA, Destroyed, 1 fatal. (.19)On August 27, 2001, about 1840 hours pacific daylight time, tanker 87 , a Grumman TS-2A, N450DF, collided with tanker 92, a Grumman TS-2A, N442DF, near…

## Docket (57 files)

The files NTSB released with the investigation on July 5, 2005, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=53123. 30.3 MB in all.

- Witness 1 Statement (AirTac) (item 1, .PDF, 2.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233762&FileExtension=.PDF&FileName=Witness%201%20Statement%20(AirTac)-Redacted.PDF
- Witness 2 Statement (Pilot for AirTac) (item 2, .PDF, 323 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233770&FileExtension=.PDF&FileName=Witness%202%20Statement%20(Pilot%20for%20AirTac)-Redacted.PDF
- Witness 3 Statement (Pilot Tanker 86) (item 3, .PDF, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233771&FileExtension=.PDF&FileName=Witness%203%20Statement%20(Pilot%20Tanker%2086)-Redacted.PDF
- Witness 4 Statement (Pilot Tanker 91) (item 4, .PDF, 805 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233772&FileExtension=.PDF&FileName=Witness%204%20Statement%20(Pilot%20Tanker%2091)-Redacted.PDF
- Witness 5 Statement 1 (Pilot Tanker 21) (item 5, .PDF, 625 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233778&FileExtension=.PDF&FileName=Witness%205%20Statement%201%20(Pilot%20Tanker%2021)-Redacted.PDF
- Witness 5 Statement 2 (Pilot Tanker 21) (item 6, .PDF, 81 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233780&FileExtension=.PDF&FileName=Witness%205%20Statement%202%20(Pilot%20Tanker%2021)-Redacted.PDF
- Witness 6 Statement 1 (Copilot Tanker 21) (item 7, .PDF, 563 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233784&FileExtension=.PDF&FileName=Witness%206%20Statement%201%20(Copilot%20Tanker%2021)-Redacted.PDF
- Witness 6 Statement 2 (Copilot Tanker 21) (item 8, .PDF, 186 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233787&FileExtension=.PDF&FileName=Witness%206%20Statement%202%20(Copilot%20Tanker%2021)-Redacted.PDF
- Witness 7 Statement 1 (Ground Witness 1, Pollitt) (item 9, .PDF, 475 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233789&FileExtension=.PDF&FileName=Witness%207%20Statement%201%20(Ground%20Witness%201,%20Pollitt)-Redacted.PDF
- Witness 7 Statement 2 (Ground Witness 1, Pollitt) (item 10, .PDF, 32 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233790&FileExtension=.PDF&FileName=Witness%207%20Statement%202%20(Ground%20Witness%201,%20Pollitt)-Master.PDF
- Witness 8 Statement (Ground Witness 2, Wattenberger) (item 11, .PDF, 1.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233793&FileExtension=.PDF&FileName=Witness%208%20Statement%20(Ground%20Witness%202,%20Wattenberger)-Redacted.PDF
- Witness 9 Statement (Ground Witness 3, Robertson) (item 12, .PDF, 474 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233795&FileExtension=.PDF&FileName=Witness%209%20Statement%20(Ground%20Witness%203,%20Robertson)-Redacted.PDF
- Witness 10 Statement (Ground Witness 4, Richardson) (item 13, .PDF, 453 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233797&FileExtension=.PDF&FileName=Witness%2010%20Statement%20(Ground%20Witness%204,%20Richardson)-Redacted.PDF
- Witness 11 Statement (Ground Witness 5, Wallace) (item 14, .PDF, 503 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233800&FileExtension=.PDF&FileName=Witness%2011%20Statement%20(Ground%20Witness%205,%20Wallace)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Baker) (item 15, .PDF, 963 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233802&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Baker)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Denton) (item 16, .PDF, 845 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233803&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Denton)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Portlock) (item 17, .PDF, 494 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233804&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Portlock)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Mehtonen) (item 18, .PDF, 165 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233809&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Mehtonen)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Brucker-Baker) (item 19, .PDF, 909 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233812&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Brucker-Baker)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Sagehorn) (item 20, .PDF, 321 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233813&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Sagehorn)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Boardman) (item 21, .PDF, 126 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233814&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Boardman)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Costa) (item 22, .PDF, 494 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233815&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Costa)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Fitch) (item 23, .PDF, 748 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233816&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Fitch)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Buck) (item 24, .PDF, 194 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233817&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Buck)-Redacted.PDF
- Witness 12 - Statements Other Witnesses (Pallesen) (item 25, .PDF, 310 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233818&FileExtension=.PDF&FileName=Witness%2012%20-%20Statements%20Other%20Witnesses%20(Pallesen)-Redacted.PDF
- Overall Wreckage Diagram (item 26, .PDF, 19 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233819&FileExtension=.PDF&FileName=Overall%20Wreckage%20Diagram-Master.PDF
- Wreckage Diagram Tanker 92 (item 27, .PDF, 13 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233820&FileExtension=.PDF&FileName=Wreckage%20Diagram%20Tanker%2092-Master.PDF
- Wreckage Diagram Tanker 87 (item 28, .PDF, 26 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233821&FileExtension=.PDF&FileName=Wreckage%20Diagram%20Tanker%2087-Master.PDF
- Overview (item 29, .PDF, 705 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233822&FileExtension=.PDF&FileName=Overview-Master.PDF
- Tanker Positions (item 30, .PDF, 146 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233823&FileExtension=.PDF&FileName=Tanker%20Positions-Master.PDF
- Debris Field (item 31, .PDF, 73 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233824&FileExtension=.PDF&FileName=Debris%20Field-Master.PDF
- Witness Locations (item 32, .PDF, 97 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233825&FileExtension=.PDF&FileName=Witness%20Locations-Master.PDF
- Photo 1 - Aerial View of Accident Site (item 33, .PDF, 85 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233826&FileExtension=.PDF&FileName=Photo%201%20-%20Aerial%20View%20of%20Accident%20Site-Master.PDF
- Photo 2 - View from Ground Witness 1 (item 34, .PDF, 63 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233827&FileExtension=.PDF&FileName=Photo%202%20-%20View%20from%20Ground%20Witness%201-Master.PDF
- Photo 3 - Tanker 92 Main Wreckage (item 35, .PDF, 950 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233828&FileExtension=.PDF&FileName=Photo%203%20-%20Tanker%2092%20Main%20Wreckage-Master.PDF
- Photo 4 - Tanker 92 Cockpit Area (item 36, .PDF, 953 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233829&FileExtension=.PDF&FileName=Photo%204%20-%20Tanker%2092%20Cockpit%20Area-Master.PDF
- Photo 5 - Tanker 92 Left Prop (item 37, .PDF, 837 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233830&FileExtension=.PDF&FileName=Photo%205%20-%20Tanker%2092%20Left%20Prop-Master.PDF
- Photo 6 - Tanker 92 Right Engine/Prop (CDF Photo) (item 38, .PDF, 851 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233831&FileExtension=.PDF&FileName=Photo%206%20-%20Tanker%2092%20Right%20Engine%2FProp%20(CDF%20Photo)-Master.PDF
- Photo 7 - Tanker 92 Right Prop & Imbedded Piece (CDF Photo) (item 39, .PDF, 750 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233832&FileExtension=.PDF&FileName=Photo%207%20-%20Tanker%2092%20Right%20Prop%20%26%20Imbedded%20Piece%20(CDF%20Photo)-Master.PDF
- Photo 8 - Tanker 92 Right Engine Nose Case (item 40, .PDF, 819 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233834&FileExtension=.PDF&FileName=Photo%208%20-%20Tanker%2092%20Right%20Engine%20Nose%20Case-Master.PDF
- Photo 9 - View of Tanker 87 PIC from Tanker 92 PIC (item 41, .PDF, 905 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233835&FileExtension=.PDF&FileName=Photo%209%20-%20View%20of%20Tanker%2087%20PIC%20from%20Tanker%2092%20PIC-Master.PDF
- Photo 10 - Tanker 87 Main Wreckage (item 42, .PDF, 910 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233836&FileExtension=.PDF&FileName=Photo%2010%20-%20Tanker%2087%20Main%20Wreckage-Master.PDF
- Photo 11 - Tanker 87 Left Outboard Horizontal Stabilizer (item 43, .PDF, 929 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233837&FileExtension=.PDF&FileName=Photo%2011%20-%20Tanker%2087%20Left%20Outboard%20Horizontal%20Stabilizer-Master.PDF
- Photo 12 - Tanker 87 Right Horizontal Stabilizer/Elevator and Vertical Stabilizer (item 44, .PDF, 986 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233838&FileExtension=.PDF&FileName=Photo%2012%20-%20Tanker%2087%20Right%20Horizontal%20Stabilizer%2FElevator%20and%20Vertical%20Stabilizer-Master.PDF
- Photo 13 - Tanker 87 Bottom of Left Inboard & Right Horizontal Stabilizer (item 45, .PDF, 956 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233839&FileExtension=.PDF&FileName=Photo%2013%20-%20Tanker%2087%20Bottom%20of%20Left%20Inboard%20%26%20Right%20Horizontal%20Stabilizer-Master.PDF
- Photo 14 - Tanker 87 Top Inboard Left Horizontal Stabilizer (item 46, .PDF, 679 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233840&FileExtension=.PDF&FileName=Photo%2014%20-%20Tanker%2087%20Top%20Inboard%20Left%20Horizontal%20Stabilizer-Master.PDF
- Photo 15 - Tanker 87 Left Side of Vertical Stabilizer (item 47, .PDF, 862 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233841&FileExtension=.PDF&FileName=Photo%2015%20-%20Tanker%2087%20Left%20Side%20of%20Vertical%20Stabilizer-Master.PDF
- Photo 16 - Tanker 87 Bottom Left Side of Rudder (item 48, .PDF, 950 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233842&FileExtension=.PDF&FileName=Photo%2016%20-%20Tanker%2087%20Bottom%20Left%20Side%20of%20Rudder-Master.PDF
- CDF Report (item 49, .PDF, 255 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233843&FileExtension=.PDF&FileName=CDF%20Report-Master.PDF
- CDF Pilot Orbit Training (item 50, .PDF, 89 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233844&FileExtension=.PDF&FileName=CDF%20Pilot%20Orbit%20Training-Master.PDF
- CDF Report Pilot/Airplane Tanker 92 (item 51, .PDF, 129 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233845&FileExtension=.PDF&FileName=CDF%20Report%20Pilot%2FAirplane%20Tanker%2092-Redacted.PDF
- CDF Report Pilot/Airplane Tanker 87 (item 52, .PDF, 147 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233846&FileExtension=.PDF&FileName=CDF%20Report%20Pilot%2FAirplane%20Tanker%2087-Redacted.PDF
- Ethanol Interpretaion (item 53, .PDF, 56 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233847&FileExtension=.PDF&FileName=Ethanol%20Interpretaion-Master.PDF
- Toxicological Report - Stratte (item 54, .PDF, 54 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40435520&FileExtension=.PDF&FileName=Toxicological%20Report%20-%20Stratte-Redacted.PDF
- Toxicological Report - Groff (item 55, .PDF, 56 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40435521&FileExtension=.PDF&FileName=Toxicological%20Report%20-%20Groff-Redacted.PDF
- Statement of Party Representatives to NTSB Investigation (item 56, .PDF, 184 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233848&FileExtension=.PDF&FileName=Statement%20of%20Party%20Representatives%20to%20NTSB%20Investigation-Redacted.PDF
- Release of Aircraft Wreckage, NTSB Form 6120.15 (item 57, .PDF, 65 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40233849&FileExtension=.PDF&FileName=Release%20of%20Aircraft%20Wreckage,%20NTSB%20Form%206120.15-Redacted.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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