# NTSB CEN11FA508: Beech A36, N41MK, Williston, ND, July 26, 2011

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: July 25, 2011, 20:36 local (Jul 26, 2011, 01:36 UTC)
- Place: Williston, ND
- Coordinates: 48.168888, -103.213607
- Nearby events: https://openairdocs.org/map.md?lat=48.1689&lon=-103.2136&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Defining event: [Maneuvering-low-alt flying: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 serious
- Status: Completed, report July 9, 2014
- Report: Approved by Office Director
- NTSB office: Central Region
- Parties: Continental Motors, Inc., Federal Aviation Administration - Fargo FSDO, Hawker Beechcraft Corporation
- NTSB case key (mKey): 81233
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN11FA508
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/81233/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=81233
- Page: https://openairdocs.org/ntsb/CEN11FA508

## Probable cause

The pilot's improper fuel management, which resulted in fuel starvation and a partial loss of engine power while maneuvering at a low altitude.

## Findings

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

- [Fluids: fuel](https://openairdocs.org/ntsb-findings/01071010): Aircraft › Fluids/misc hardware · Fluid management (probable cause); cases with it: [Beech A36, 22 cases](https://openairdocs.org/ntsb-findings/01071010/cases.md?model=1151604), [All aircraft, 1,695 cases](https://openairdocs.org/ntsb-findings/01071010/cases.md)
- [Engine fuel and control: fuel distribution](https://openairdocs.org/ntsb-findings/01057310): Aircraft › Aircraft power plant · Incorrect use/operation (probable cause); cases with it: [Beech A36, 2 cases](https://openairdocs.org/ntsb-findings/01057310/cases.md?model=1151604), [All aircraft, 55 cases](https://openairdocs.org/ntsb-findings/01057310/cases.md)
- [Use of equip/info: use of equip/system](https://openairdocs.org/ntsb-findings/02063015): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Beech A36, 17 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md?model=1151604), [All aircraft, 1,391 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md)

## Sequence of events

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

- [Maneuvering-low-alt flying: Fuel starvation](https://openairdocs.org/ntsb-events/191); cases with it: [Beech A36, 15 cases](https://openairdocs.org/ntsb-events/191/sequence.md?model=1151604), [All aircraft, 733 cases](https://openairdocs.org/ntsb-events/191/sequence.md)
- [Maneuvering-low-alt flying: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342) (defining event); cases with it: [Beech A36, 7 cases](https://openairdocs.org/ntsb-events/342/sequence.md?model=1151604), [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md)
- [Landing: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Beech A36, 47 cases](https://openairdocs.org/ntsb-events/440/sequence.md?model=1151604), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md)
- [Landing: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Beech A36, 78 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=1151604), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md)

## Analysis

The passenger reported that the purpose of the local flight was to take low-altitude aerial photographs of nearby ground structures and that, shortly before the accident, the pilot remarked that the engine was not operating normally and asked him to look for a suitable landing area. He believed that the engine was still running at that time. The pilot located an open landing area and was in the process of landing when the right wing collided with terrain. During the postaccident examination, about 18 gallons of usable fuel was recovered from the left wing fuel tank, and no usable fuel was recovered from the right wing fuel tank. The observed damage to the propeller blades was indicative of the engine producing at least idle power at the time of the accident. A postaccident examination of the airplane revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. Additionally, the engine demonstrated the ability to produce rated horsepower during an operational test run. A review of fueling records and recorded engine data from previous flights established that the partial loss of engine power was likely due to fuel starvation and not from a mechanical malfunction of the engine. Although the fuel selector was found positioned to draw fuel from the left wing fuel tank, it is likely that the pilot repositioned the selector from the right wing fuel tank when he detected the engine problem. Because he was maneuvering at a low altitude, the airplane likely had insufficient altitude and time to reestablish fuel flow and restore engine power.

## Factual narrative

The accident airplane was a 1975 Beech model A36 airplane, serial number E-662. A 300-horsepower Continental Motors model IO-550-C (8)CB4 reciprocating engine, serial number 824409-R, powered the airplane. The stock engine had been modified with a turbo-normalizing induction system that was installed by Tornado Alley Turbo under the provisions of FAA Supplemental Type Certificate No. SA5223NM. The airplane was equipped with a constant-speed, three blade, Hartzell model PHC-C3YF-1RF propeller. The airplane had a retractable tricycle landing gear, could seat six individuals, and had a certified maximum gross weight of 4,000 pounds. The accident airplane was issued a standard airworthiness certificate on March 11, 1975. The current owner-of-record, Bonanza Air Incorporated, purchased the airplane on July 18, 2005. The recording tachometer indicated 6,172.27 hours at the accident site. The airframe had accumulated a total service time of 6,172.27 hours at the time of the accident. The engine had accumulated a total service time of 2,619.17 hours at the time of the accident. The engine had accumulated 711.27 hours since a field overhaul on August 1, 2008. The engine had accumulated 115.27 hours since a top-overhaul that was completed on January 7, 2011. The propeller had accumulated a total service time of 321.27 hours at the time of the accident. The last annual inspection of the airplane was completed on September 29, 2010, at 5,993.0 total airframe hours. A postaccident review of the maintenance records found no history of unresolved airworthiness issues. A review of fueling records established that on July 24, 2011, the airplane fuel tanks were topped-off (74 gallons useable) with 60.3 gallons of aviation fuel before the pilot departed on a 3.1 hour cross-country flight from Rocky Mountain Metropolitan Airport (BJC), Denver, Colorado, to Sloulin Field International Airport (ISN), Williston, North Dakota. According to available fueling records, the airplane was not refueled following the cross-country flight. The accident occurred during the airplane's first flight since completing the 3.1 hour cross-country flight between BJC and ISN. On July 25, 2011, at 2036 central daylight time, a Beech model A36 airplane, N41MK, was substantially damaged when it collided with terrain during a forced landing near Williston, North Dakota. The pilot was fatally injured. The passenger sustained serious injuries. The airplane was registered to and operated by Bonanza Air Incorporated under the provisions of 14 Code of Federal Regulations Part 91 without a flight plan. Day visual meteorological conditions prevailed for the local flight that departed Sloulin Field International Airport (ISN), Williston, North Dakota, about 2018. According to the passenger, the purpose of the flight was to take aerial photographs of a nearby oil well installation and a cabin belonging to a relative of the pilot. The passenger arrived at the departure airport around 2000 and observedthe pilot perform a preflight inspection of the airplane. After departure, the flight proceeded eastbound to photograph the oil well installation. The passenger noted that the entire flight was flown at a low altitude and that his photos were taken from the right cockpit passenger seat. After taking several photos of the oil well installation the flight proceeded to overfly the cabin. The passenger recalled that shortly before the accident, the pilot remarked that the engine was not operating normally and asked him to look for a suitable landing area. He believed that the engine was still running at that time. The pilot located an open landing area and was in the process of landing when the right wing collided with the terrain. The passenger noted that the airplane slid for a short distance and that he was able to pull himself out of the airplane before calling 911 for assistance. A foreman working at a nearby oil drilling installation stated that he and two of his employees saw the airplane flying at a low altitude over their worksite. He noted that the airplane's altitude was comparable to those flown by aerial-application airplanes during crop-dusting operations. He could not recall if the engine was operating as it passed his position. He noted that the airplane was flying straight-and-level before it collided with the terrain. He responded immediately to the accident site and provided assistance to the passenger until the arrival of emergency personnel. He also noted that he attempted to stop a fuel leak on the right wing using several towels. On July 27, 2011, an autopsy was performed on the pilot at the North Dakota State Forensic Examiner's Office, located in Bismarck, North Dakota. The cause of death for the pilot was attributed to multiple blunt-force injuries sustained during the accident. The FAA Civil Aerospace Medical Institute (CAMI), located in Oklahoma City, Oklahoma, performed toxicology tests on samples obtained during the pilot's autopsy. No carbon monoxide, cyanide, or ethanol was detected in samples tested. Ibuprofen was detected in urine. Ibuprofen, sold under multiple brand names, is a nonsteroidal anti-inflammatory analgesic drug. The nearest aviation weather reporting station was located at the Sloulin Field International Airport (ISN), Williston, North Dakota, about 19.5 miles west of the accident site. At 2052, the ISN weather observing system reported: wind 110 degrees at 10 knots, 10 miles visibility, clear sky conditions, temperature 26 degrees Celsius, dew point 14 degrees Celsius, and an altimeter setting of 29.84 inches-of-mercury. According to Federal Aviation Administration (FAA) records, the pilot, age 53, held a private pilot certificate with single engine land airplane and instrument airplane ratings. His last aviation medical examination was completed on February 16, 2010, when he was issued a third-class medical certificate with a restriction for corrective lenses. A search of FAA records showed noprevious accidents, incidents, or enforcement proceedings. The most recent pilot logbook entry was dated July 24, 2011. At that time, the pilot had accumulated 1,721.4 hours total flight time. The logbook indicated that all of his flight experience had been completed in single-engine land airplanes, which included 1,595.9 hours in the accident airplane. He had logged 129.7 hours during the past year, 59.8 hours during the prior 6 months, 25.5 hours during previous 90 days, and 17.8 hours in the last 30 days. The logbook indicated that he had flown 3.2 hours within the 24 hour period before the accident. The pilot's last flight review was completed on May 8, 2009, in the accident airplane. The logbook included an instructor endorsement to operate complex airplanes, which was dated November 4, 2010. (FAA guidance stipulated that a complex endorsement would also qualify for a flight review, although regulations require that both items be identified on the instructor's logbook endorsement.) --- Engine Operational Test Run --- The engine was sent to the manufacturer for an operational test run under the supervision of the National Transportation Safety Board (NTSB) Investigator-In-Charge. The engine was installed in a test cell and outfitted with a test club propeller. The engine started on the first attempt and idled without excessive fluctuations in engine rpm. The engine speed was increased incrementally to full throttle (2,575 rpm) over a period of 25 minutes. The engine ran at each incremental power setting for a period of 5 minutes without anomaly. The engine throttle was cycled several times between idle and maximum power settings in quick succession. The engine did not experience any hesitation, stumbling, or interruption in engine operation during the test run. The engine demonstrated the ability to produce rated horsepower during the operational test run. --- Engine Monitoring System --- The airplane's engine monitoring system, a JPI model EDM-700, was examined at the NTSB Vehicle Recorders Laboratory in Washington, D.C. The device contained about 25 hours of engine data that had been recorded over 18 power cycles. The accident flight was the last dataset recorded and contained 1,194 seconds (about 20 minutes) worth of engine data. A review of the recovered engine data revealed an average increase of 225 degrees in exhaust gas temperatures (EGT) and the turbine inlet temperature (TIT) during a 24 second period before there was significant decrease to all EGT, TIT, and engine oil temperature values. All of the engine temperature values continued to decrease until there was a power interruption to the device, which occurred about 55 seconds after the temperature values had peaked. --- Electronic Fuel Flow Indicator --- The electronic fuel flow indicator, a Shadin model Microflo-L, was examined at the NTSB Vehicle Recorders Laboratory. The fuel flow indicator did not interface with the airplane's fuel quantity indicating system. In order toproperly indicate the amount of fuel available, the unit required the pilot to correctly enter or verify the actual fuel load before each engine startup. All subsequent fuel readings were based on fuel flow to the engine. The fuel flow indicator contained non-volatile memory for the amount of fuel remaining and the amount of fuel used since the last time the device had been programmed. These retained values were obtained by applying electrical power to the device and viewing the display. The values obtained for fuel-used and fuel-remaining were 3.9 gallons and 70.0 gallons, respectively. Fueling records established that the airplane had not been refueled before the accident flight. Additionally, the airplane fuel system did not contain 70 gallons of fuel at the accident site. The fuel flow indicator was equipped with a toggle-switch that upon deflection would automatically reset the fuel quantity to a "FULL" indication. The retained value for fuel-used (3.9 gallons) was consistent with the amount of fuel that was likely consumed during the accident flight. --- Fuel Consumption Rate Calculations --- The accident airplane had an 80 gallon fuel capacity (74 gallons usable) that was distributed evenly between two 40 gallon wing fuel tanks. During the on-scene investigation, 18 gallons of useable fuel was defueled from the left wing tank. The right wing tank was void of useable fuel. According to available flight tracking and engine monitoring system data, the airplane engine had been operating at least 3.4 hours since the last refueling. Considering the useable fuel recovered from the airplane, the average fuel consumption since the last refueling was calculated to be about 16.5 gallons per hour (gph). A review of the previous 18 flight legs established that the airplane had an average fuel consumption rate of about 17.4 gph. Additionally, the airplane's co-owner further corroborated that the airplane's average fuel consumption rate was about 17.4 gph. According to engine performance data, the expected fuel consumption rate during takeoff and cruise-climb was 35 gph. The expected fuel consumption rate during cruise flight, at a lean-of-peak mixture setting, could vary between 13.5 and 17.0 gph depending on the selected engine rpm. A postaccident investigation confirmed that all airframe structural and flight control components were located at the accident site. The accident site consisted of open, rolling terrain. The wreckage debris path began about 109 feet west of the main wreckage and consisted of navigational lens cover fragments. There was a large ground depression located about 20 feet from the initial debris. The main wreckage consisted of the entire airframe, flight controls, engine, and propeller. The main wreckage was facing a heading of south. The topography of the accident site and orientation of the wreckage resulted in the right wing being higher than the left wing. Flight control continuity was established between the individualflight control surfaces and their respective cockpit controls. The flaps and landing gear were fully retracted. The throttle, propeller, and mixture controls were found in the full forward position. Mechanical continuity was confirmed from the engine components to their respective cockpit engine controls. The magneto-ignition switch was found in the LEFT position. The electrical fuel pump was found in the OFF position. The fuel selector valve was positioned to draw fuel from the left wing fuel tank. About 21 gallons of fuel (18 gallons useable) was recovered from the left wing fuel tank. The left wing tank appeared undamaged with no visible fuel leaks. The right wing tank contained minimal fuel, estimated to be about 1 gallon, all of which was found in the fuel tank's inboard baffle compartment. The integrity of the right wing fuel tank had been breached by several punctures that were located about midspan. The fuselage fuel-sump strainer contained a liquid consistent in appearance and odor with 100-low lead aviation fuel that was void of water and particulate contamination. The engine remained partially attached to the firewall and the propeller remained attached to the crankshaft flange. Internal engine and valve train continuity was confirmed as the engine crankshaft was rotated. Compression and suction were noted on all cylinders in conjunction with crankshaft rotation. The upper spark plugs were removed and exhibited features consistent with normal engine operation. Both magnetos provided spark on all leads when rotated. The throttle and fuel control assembly had separated from the engine during the accident. The intake ducting from the air filter to the throttle control was not obstructed by debris. The engine-driven fuel pump functioned when rotated. The fuel supply line to the fuel manifold valve contained a liquid consistent in appearance and odor with 100-low lead aviation fuel. The turbine, compressor, and center housing remained intact. The turbocharger shaft rotated freely by hand. The compressor contained debris consistent with the ingestion of vegetation during the impact sequence. The exhaust wastegate was found in the open position. Two of the three propeller blade tips exhibited leading edge gouges and chordwise scratching. The postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. The engine was shipped to the manufacturer for an operational test run. The electronic fuel flow indicator and engine monitoring system were retained for nonvolatile data readouts.

## Aircraft

- Registration: [N41MK](https://openairdocs.org/deregistered/N41MK-2017-06-22), registration cancelled 2017-06-22, S/N E-662, built 1975 (OpenAirDocs)
- Reported make and model: BEECH A36
- Registry model: [Beech A36](https://openairdocs.org/model/beech-a36) (registry code 1151604) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: E-662
- Year built: 1975
- Airframe hours: 6172.27
- Engines: Continental Motors IO-550-C 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Bonanza Air, Inc.
- Registered owner: Bonanza Air, Inc.
- Airworthiness certificate: Standard, Utility
- Last inspection: Annual, September 29, 2010, 179.27 hours before
- Departed: ISN, Williston, ND
- Destination: ISN, Williston, ND
- Equipment: Stall warning system

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; injuries: fatal; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, with waivers/limitations; last flight review November 4, 2010; seat: left; restraint: 3-point; toxicology performed; flight hours: 1,721.4 total, 1,595.9 in this make and model, 25.5 in the last 90 days, 17.7 in the last 30 days, 3.2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 110° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 57 °F
- Altimeter: 29.84 inHg
- Observed at: ISN, 17 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 20110725018499A](https://openairdocs.org/incident/20110725018499A), Jul 25, 2011: Beech A36, Williston, ND, Substantial damage, 1 fatal. On July 25, 2011, at 2036 CDT, Beech A36, N41MK was substantially damaged while attempting to make a forced landing near Williston, ND. The pilot was fatally…

## Docket (33 files)

The files NTSB released with the investigation on June 24, 2014, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=81233. 14.1 MB in all.

- Passenger Statement (Gerald Gratz) (item 1, .PDF, 107 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413555&FileExtension=.PDF&FileName=Passenger%20Statement%20(Gerald%20Gratz)-Redacted.PDF
- Record of Conversation (Monte Gourley) (item 2, .PDF, 13 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413556&FileExtension=.PDF&FileName=Record%20of%20Conversation%20(Monte%20Gourley)-Redacted.PDF
- North Dakota Highway Patrol Incident Report (item 3, .PDF, 269 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413557&FileExtension=.PDF&FileName=North%20Dakota%20Highway%20Patrol%20Incident%20Report-Redacted.PDF
- Pilot Logbook (Excerpts) (item 4, .PDF, 2.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413558&FileExtension=.PDF&FileName=Pilot%20Logbook%20(Excerpts)-Redacted.PDF
- Pilot Flight Time Summary (Insurance Company Quote) (item 5, .PDF, 183 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413559&FileExtension=.PDF&FileName=Pilot%20Flight%20Time%20Summary%20(Insurance%20Company%20Quote)-Redacted.PDF
- Airframe Logbook (Excerpts) (item 6, .PDF, 888 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413560&FileExtension=.PDF&FileName=Airframe%20Logbook%20(Excerpts)-Redacted.PDF
- Engine Logbook (Excerpts) (item 7, .PDF, 1.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413561&FileExtension=.PDF&FileName=Engine%20Logbook%20(Excerpts)-Redacted.PDF
- Propeller Logbook (Excerpts) (item 8, .PDF, 477 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413562&FileExtension=.PDF&FileName=Propeller%20Logbook%20(Excerpts)-Redacted.PDF
- Pilot Operating Handbook Supplement for Turbonormalizer System (Excerpts) (item 9, .PDF, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413563&FileExtension=.PDF&FileName=Pilot%20Operating%20Handbook%20Supplement%20for%20Turbonormalizer%20System%20(Excerpts)-Redacted.PDF
- Email Correspondence Concerning Fuel Consumption Rate (item 10, .PDF, 166 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413564&FileExtension=.PDF&FileName=Email%20Correspondence%20Concerning%20Fuel%20Consumption%20Rate-Redacted.PDF
- Engine Test Run Report (item 11, .PDF, 946 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413565&FileExtension=.PDF&FileName=Engine%20Test%20Run%20Report-Redacted.PDF
- Engine Data Monitor (EDM) - Specialist's Factual Report (item 12, .PDF, 325 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40365127&FileExtension=.PDF&FileName=Engine%20Data%20Monitor%20(EDM)%20-%20Specialist%27s%20Factual%20Report-Master.PDF
- Engine Data Monitor (EDM) - Attachment 1 - Tabular Data - Flight - (CSV Format) (item 13, .CSV, 18 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40365128&FileExtension=.csv&FileName=Engine%20Data%20Monitor%20(EDM)%20-%20Attachment%201%20-%20Tabular%20Data%20-%20Flight%20-%20(CSV%20Format)-Master.csv
- Engine Data Monitor (EDM) - Attachment 2 - Tabular Data - Additional Flights - (CSV Format) (item 14, .CSV, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40365129&FileExtension=.csv&FileName=Engine%20Data%20Monitor%20(EDM)%20-%20Attachment%202%20-%20Tabular%20Data%20-%20Additional%20Flights%20-%20(CSV%20Format)-Master.csv
- Weather Reports (item 15, .PDF, 99 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413566&FileExtension=.PDF&FileName=Weather%20Reports-Master.PDF
- Toxicology Report - Pilot (item 16, .PDF, 64 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413567&FileExtension=.PDF&FileName=Toxicology%20Report%20-%20Pilot-Master.PDF
- NTSB Party Form (Hawker Beechcraft) (item 17, .PDF, 84 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413568&FileExtension=.PDF&FileName=NTSB%20Party%20Form%20(Hawker%20Beechcraft)-Redacted.PDF
- NTSB Party Form (Continental Motors) (item 18, .PDF, 84 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413569&FileExtension=.PDF&FileName=NTSB%20Party%20Form%20(Continental%20Motors)-Redacted.PDF
- Release of Aircraft Wreckage, NTSB Form 6120.15 (item 19, .PDF, 104 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413570&FileExtension=.PDF&FileName=Release%20of%20Aircraft%20Wreckage,%20NTSB%20Form%206120.15-Redacted.PDF
- Photo 01 - Accident Site Overview (item 20, .PDF, 344 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413571&FileExtension=.PDF&FileName=Photo%2001%20-%20Accident%20Site%20Overview-Master.PDF
- Photo 02 – Accident Site Overview (item 21, .PDF, 312 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413572&FileExtension=.PDF&FileName=Photo%2002%20%E2%80%93%20Accident%20Site%20Overview-Master.PDF
- Photo 03 - Forward Left Side of Airplane (item 22, .PDF, 280 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413573&FileExtension=.PDF&FileName=Photo%2003%20-%20Forward%20Left%20Side%20of%20Airplane-Master.PDF
- Photo 04 - Left Side of Airplane (item 23, .PDF, 287 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413574&FileExtension=.PDF&FileName=Photo%2004%20-%20Left%20Side%20of%20Airplane-Master.PDF
- Photo 05 - Rear of Airplane (item 24, .PDF, 257 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413575&FileExtension=.PDF&FileName=Photo%2005%20-%20Rear%20of%20Airplane-Master.PDF
- Photo 06 - Rear Right Side of Airplane (item 25, .PDF, 340 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413576&FileExtension=.PDF&FileName=Photo%2006%20-%20Rear%20Right%20Side%20of%20Airplane-Master.PDF
- Photo 07 - Engine and Propeller (item 26, .PDF, 391 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413577&FileExtension=.PDF&FileName=Photo%2007%20-%20Engine%20and%20Propeller-Master.PDF
- Photo 08 - Right Side of Engine (item 27, .PDF, 261 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413578&FileExtension=.PDF&FileName=Photo%2008%20-%20Right%20Side%20of%20Engine-Master.PDF
- Photo 09 - Left Side of Engine (item 28, .PDF, 305 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413579&FileExtension=.PDF&FileName=Photo%2009%20-%20Left%20Side%20of%20Engine-Master.PDF
- Photo 10 - Top of Engine (item 29, .PDF, 328 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413580&FileExtension=.PDF&FileName=Photo%2010%20-%20Top%20of%20Engine-Master.PDF
- Photo 11 - Rear of Engine (item 30, .PDF, 301 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413581&FileExtension=.PDF&FileName=Photo%2011%20-%20Rear%20of%20Engine-Master.PDF
- Photo 12 - Propeller Blade Tip "A" (item 31, .PDF, 177 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413583&FileExtension=.PDF&FileName=Photo%2012%20-%20Propeller%20Blade%20Tip%20%22A%22-Master.PDF
- Photo 13 - Propeller Blade Tip "B" (item 32, .PDF, 189 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413584&FileExtension=.PDF&FileName=Photo%2013%20-%20Propeller%20Blade%20Tip%20%22B%22-Master.PDF
- Photo 14 - Propeller Blade Tip "C" (item 33, .PDF, 193 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40413585&FileExtension=.PDF&FileName=Photo%2014%20-%20Propeller%20Blade%20Tip%20%22C%22-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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