# NTSB DCA18MA142: Boeing 737 7H4, N772SW, Philadelphia, PA, April 17, 2018

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Class 1 · Major · Final report
- Date: April 17, 2018, 11:03 local (15:03 UTC)
- Place: Philadelphia, PA
- Coordinates: 39.871944, -75.239997
- Nearby events: https://openairdocs.org/map.md?lat=39.8719&lon=-75.2400&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Defining event: [Enroute-climb to cruise: Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340)
- Highest injury: Fatal
- Injuries: 1 fatal, 8 serious, 125 minor, 6 uninjured
- Status: Completed, report March 10, 2020
- Report: Board-adopted at Board Meeting
- Investigation class: Class 1
- NTSB office: Major Investigations Division
- Safety recommendations: Yes
- NTSB case key (mKey): 97056
- NTSB case page: https://www.ntsb.gov/investigations/Pages/DCA18MA142.aspx
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/97056/pdf
- Board report AAR1903 (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR1903.pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=97056
- Page: https://openairdocs.org/ntsb/DCA18MA142

## Probable cause

A low-cycle fatigue crack in the dovetail of fan blade No. 13, which resulted in the fan blade separating in flight and impacting the engine fan case at a location that was critical to the structural integrity and performance of the fan cowl structure. This impact led to the in-flight separation of fan cowl components, including the inboard fan cowl aft latch keeper, which struck the fuselage near a cabin window and caused the window to depart from the airplane, the cabin to rapidly depressurize, and the passenger fatality.

## Findings

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

- [Engine (turbine/turboprop): compressor section](https://openairdocs.org/ntsb-findings/01057230): Aircraft › Aircraft power plant · Fatigue/wear/corrosion (probable cause); cases with it: [Boeing 737-7H4, 2 cases](https://openairdocs.org/ntsb-findings/01057230/cases.md?model=1384404), [All aircraft, 53 cases](https://openairdocs.org/ntsb-findings/01057230/cases.md)
- [Nacelles/pylons structure: nacelle/pylon misc structure](https://openairdocs.org/ntsb-findings/01035420): Aircraft › Aircraft structures · Damaged/degraded (probable cause); cases with it: [Boeing 737-7H4, 1 case](https://openairdocs.org/ntsb-findings/01035420/cases.md?model=1384404), [All aircraft, 5 cases](https://openairdocs.org/ntsb-findings/01035420/cases.md)
- [Windows-windshield system: passenger compartment windows](https://openairdocs.org/ntsb-findings/01035620): Aircraft › Aircraft structures · Damaged/degraded (probable cause); cases with it: [Boeing 737-7H4, 1 case](https://openairdocs.org/ntsb-findings/01035620/cases.md?model=1384404), [All aircraft, 2 cases](https://openairdocs.org/ntsb-findings/01035620/cases.md)
- [Resources: availability of documents/info](https://openairdocs.org/ntsb-findings/04022040): Organizational issues › Management · FAA/Regulator; cases with it: [Boeing 737-7H4, 1 case](https://openairdocs.org/ntsb-findings/04022040/cases.md?model=1384404), [All aircraft, 2 cases](https://openairdocs.org/ntsb-findings/04022040/cases.md)
- [Action: lack of action](https://openairdocs.org/ntsb-findings/02041030): Personnel issues › Action/decision · Cabin crew; cases with it: [Boeing 737-7H4, 2 cases](https://openairdocs.org/ntsb-findings/02041030/cases.md?model=1384404), [All aircraft, 792 cases](https://openairdocs.org/ntsb-findings/02041030/cases.md)

## Sequence of events

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

- [Enroute-climb to cruise: Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340) (defining event); cases with it: [Boeing 737-7H4, 4 cases](https://openairdocs.org/ntsb-events/340/sequence.md?model=1384404), [All aircraft, 820 cases](https://openairdocs.org/ntsb-events/340/sequence.md)

## Analysis

The NTSB's full report is available at http://www.ntsb.gov/investigations/AccidentReports/Pages/AccidentReports.aspx. The Aircraft Accident Report number is NTSB/AAR-19/03. On April 17, 2018, about 1103 eastern daylight time, Southwest Airlines flight 1380, a Boeing 737-7H4, N772SW, experienced a left engine failure while climbing through flight level 320 en route to the flight's assigned cruise altitude. The flight had departed from LaGuardia Airport, Queens, New York, about 30 minutes earlier. As a result of the engine failure, the flight crew conducted an emergency descent and diverted to Philadelphia International Airport (PHL), Philadelphia, Pennsylvania. Portions of the left engine inlet and fan cowl separated from the airplane, and fragments from the inlet and fan cowl struck the left wing, the left-side fuselage, and the left horizontal stabilizer. One fan cowl fragment impacted the left-side fuselage near a cabin window, and the window departed the airplane, which resulted in a rapid depressurization. The airplane landed safely at PHL about 17 minutes after the engine failure occurred. Of the 144 passengers and 5 crewmembers aboard the airplane, 1 passenger received fatal injuries, and 8 passengers received minor injuries. The airplane was substantially damaged. The regularly scheduled domestic passenger flight was operating under the provisions of Title 14 Code of Federal Regulations Part 121 with a destination of Dallas Love Field, Dallas, Texas. The National Transportation Safety Board determines the probable cause(s) of this accident as follows: A low-cycle fatigue crack in the dovetail of fan blade No. 13, which resulted in the fan blade separating in flight and impacting the engine fan case at a location that was critical to the structural integrity and performance of the fan cowl structure. This impact led to the in-flight separation of fan cowl components, including the inboard fan cowl aft latch keeper, which struck the fuselage near a cabin window and caused the window to depart from the airplane, the cabin to rapidly depressurize, and the passenger fatality.

## Factual narrative

The NTSB's full report is available at http://www.ntsb.gov/investigations/AccidentReports/Pages/AccidentReports.aspx. The Aircraft Accident Report number is NTSB/AAR-19/03. On April 17, 2018, about 1103 eastern daylight time, Southwest Airlines flight 1380, a Boeing 737-7H4, N772SW, experienced a left engine failure while climbing through flight level 320 en route to the flight's assigned cruise altitude. The flight had departed from LaGuardia Airport, Queens, New York, about 30 minutes earlier. As a result of the engine failure, the flight crew conducted an emergency descent and diverted to Philadelphia International Airport (PHL), Philadelphia, Pennsylvania. Portions of the left engine inlet and fan cowl separated from the airplane, and fragments from the inlet and fan cowl struck the left wing, the left-side fuselage, and the left horizontal stabilizer. One fan cowl fragment impacted the left-side fuselage near a cabin window, and the window departed the airplane, which resulted in a rapid depressurization. The airplane landed safely at PHL about 17 minutes after the engine failure occurred. Of the 144 passengers and 5 crewmembers aboard the airplane, 1 passenger received fatal injuries, and 8 passengers received minor injuries. The airplane was substantially damaged. The regularly scheduled domestic passenger flight was operating under the provisions of Title 14 Code of Federal Regulations Part 121 with a destination of Dallas Love Field, Dallas, Texas.

## Aircraft

- Registration: [N772SW](https://openairdocs.org/deregistered/N772SW-2024-10-28), registration cancelled 2024-10-28, S/N 27880, built 2000 (OpenAirDocs)
- Reported make and model: BOEING 737 7H4 (7H4)
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (registry code 1384404) (OpenAirDocs)
- Registry engine: [CFM International CFM56 series](https://openairdocs.org/engine/cfm-international-cfm56-series) (registry code 13802, turbo-fan) (OpenAirDocs)
- Category: Airplane
- Serial number: 27880
- Year built: 2000
- Engines: CFM INTL. CFM56 SERIES turbo fan; CFM INTL. CFM56 SERIES turbo fan
- Damage: Substantial damage
- Flight: Part 121
- Operator: Southwest Airlines Co
- Registered owner: Southwest Airlines Co
- Airworthiness certificate: Standard, Transport
- Departed: LGA, NEW YORK, NY
- Destination: DAL, DALLAS, TX
- Flight plan: IFR
- Airport: KPHL, Philadelphia, runway 27L, 12,000 × 200 ft

## Weather

- Conditions: Visual (VMC), Day

## 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 20180417024829A](https://openairdocs.org/incident/20180417024829A), Apr 17, 2018: Boeing 737-7H4, Philidephia, PA, Substantial damage, 1 fatal. On April 17, 2018, at 1103 eastern daylight time, southwest airlines flight 1380, a Boeing 737-700, N772SW, experienced a failure of the left, cfm…

## Docket (53 files)

The files NTSB released with the investigation on November 14, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=97056. 197 MB in all.

- 1-A Order of Hearing (item 1, .PDF, 159 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467989&FileExtension=.PDF&FileName=1-A%20Order%20of%20Hearing-Master.PDF
- 1-B Designation of Chairman Board of Inquiry (item 2, .PDF, 187 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467990&FileExtension=.PDF&FileName=1-B%20Designation%20of%20Chairman%20Board%20of%20Inquiry-Master.PDF
- 1-C Designation of Hearing Officer (item 3, .PDF, 52 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467991&FileExtension=.PDF&FileName=1-C%20Designation%20of%20Hearing%20Officer-Master.PDF
- 1-D Designation of Parties to the Hearing (item 4, .PDF, 168 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467992&FileExtension=.PDF&FileName=1-D%20Designation%20of%20Parties%20to%20the%20Hearing-Master.PDF
- 1-E Notice of Investigative Hearing (item 5, .PDF, 47 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467993&FileExtension=.PDF&FileName=1-E%20Notice%20of%20Investigative%20Hearing-Master.PDF
- 1-F Statement of Purpose (item 6, .PDF, 140 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467994&FileExtension=.PDF&FileName=1-F%20Statement%20of%20Purpose-Master.PDF
- 1-G Witness List (item 7, .PDF, 70 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468278&FileExtension=.PDF&FileName=1-G%20Witness%20List-Master.PDF
- 1-H Investigative Hearing Witness Professional Biographies (item 8, .PDF, 162 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467995&FileExtension=.PDF&FileName=1-H%20Investigative%20Hearing%20Witness%20Professional%20Biographies-Master.PDF
- 2-A Operational Factors Group Chairman's Factual Report (item 9, .PDF, 936 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468241&FileExtension=.PDF&FileName=2-A%20Operational%20Factors%20Group%20Chairman%27s%20Factual%20Report-Master.PDF
- 2-B Operational Factors Group Chairman's Factual Report Attachment 1 (item 10, .PDF, 196 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468242&FileExtension=.PDF&FileName=2-B%20Operational%20Factors%20Group%20Chairman%27s%20Factual%20Report%20Attachment%201-Master.PDF
- 2-C Operational Factors Group Chairman's Factual Report Attachment 2 (item 11, .PDF, 290 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468243&FileExtension=.PDF&FileName=2-C%20Operational%20Factors%20Group%20Chairman%27s%20Factual%20Report%20Attachment%202-Master.PDF
- 2-D Operational Factors Group Chairman's Factual Report Attachment 3 (item 12, .PDF, 177 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468244&FileExtension=.PDF&FileName=2-D%20Operational%20Factors%20Group%20Chairman%27s%20Factual%20Report%20Attachment%203-Master.PDF
- 2-E Operational Factors Group Chairman's Factual Report Attachment 4 (item 13, .PDF, 135 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468245&FileExtension=.PDF&FileName=2-E%20Operational%20Factors%20Group%20Chairman%27s%20Factual%20Report%20Attachment%204-Master.PDF
- 2-F Operational Factors Group Chairman's Factual Report Attachment 5 (item 14, .PDF, 174 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468246&FileExtension=.PDF&FileName=2-F%20Operational%20Factors%20Group%20Chairman%27s%20Factual%20Report%20Attachment%205-Master.PDF
- 2-G Operational Factors Group Chairman's Factual Report Attachment 6 (item 15, .PDF, 593 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468247&FileExtension=.PDF&FileName=2-G%20Operational%20Factors%20Group%20Chairman%27s%20Factual%20Report%20Attachment%206-Master.PDF
- 2-H Operational Factors Group Chairman's Factual Report Attachment 7 (item 16, .PDF, 169 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468248&FileExtension=.PDF&FileName=2-H%20Operational%20Factors%20Group%20Chairman%27s%20Factual%20Report%20Attachment%207-Master.PDF
- 3-A Air Traffic Control Specialist Report (item 17, .PDF, 198 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467996&FileExtension=.PDF&FileName=3-A%20Air%20Traffic%20Control%20Specialist%20Report-Master.PDF
- 3-B Air Traffic Control Specialist Report - Attachment 1 (item 18, .PDF, 1.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40467997&FileExtension=.PDF&FileName=3-B%20Air%20Traffic%20Control%20Specialist%20Report%20-%20Attachment%201-Master.PDF
- 3-L Air Traffic Control - Radar Data Multiple Sensors in Excel Format (item 19, XLSX, 238 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468007&FileExtension=xlsx&FileName=3-L%20Air%20Traffic%20Control%20-%20Radar%20Data%20Multiple%20Sensors%20in%20Excel%20Format-Master
- 3-M Air Traffic Control - 84TH RADES Primary Radar Data with Height Finder in Excel Format (item 20, XLSX, 17 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468008&FileExtension=xlsx&FileName=3-M%20Air%20Traffic%20Control%20-%2084TH%20RADES%20Primary%20Radar%20Data%20with%20Height%20Finder%20in%20Excel%20Format-Master
- 3-N Air Traffic Control - FAA Accident Package (item 21, .PDF, 23.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468009&FileExtension=.PDF&FileName=3-N%20Air%20Traffic%20Control%20-%20FAA%20Accident%20Package-Master.PDF
- 3-O Air Traffic Control ASR Google Earth Plots of SWA1380 (item 22, KML, 217 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468249&FileExtension=kml&FileName=3-O%20Air%20Traffic%20Control%20ASR%20Google%20Earth%20Plots%20of%20SWA1380-Master
- 3-P Air Traffic Control 84th RADES ARSR 4 Primary Target Radar Data with Height Finder Active (item 23, KML, 35 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468250&FileExtension=kml&FileName=3-P%20Air%20Traffic%20Control%2084th%20RADES%20ARSR%204%20Primary%20Target%20Radar%20Data%20with%20Height%20Finder%20Active-Master
- 3-Q Air Traffic Control Google Earth Plot SWA1380 (item 24, KML, 217 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468251&FileExtension=kml&FileName=3-Q%20Air%20Traffic%20Control%20Google%20Earth%20Plot%20SWA1380-Master
- 5 - Meteorology - Weather Factual Report (item 25, .PDF, 4.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468010&FileExtension=.PDF&FileName=5%20-%20Meteorology%20-%20Weather%20Factual%20Report-Master.PDF
- 5 - Meteorology - Weather Attachment 1 (item 26, .GIF, 10.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468011&FileExtension=.gif&FileName=5%20-%20Meteorology%20-%20Weather%20Attachment%201-Master.gif
- 6-A Survival Factors Factual Report (item 27, .PDF, 2 photos, 341 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468012&FileExtension=.PDF&FileName=6-A%20Survival%20Factors%20Factual%20Report-Master.PDF
- 6-B Survival Factors Factual Report - Attachment 1 - Flight Attendant and Passenger Interviews (item 28, .PDF, 92 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468013&FileExtension=.PDF&FileName=6-B%20Survival%20Factors%20Factual%20Report%20-%20Attachment%201%20-%20Flight%20Attendant%20and%20Passenger%20Interviews-Master.PDF
- 6-C Survival Factors Factual Report - Attachment 2 - SWAU Training Staff Interviews (item 29, .PDF, 8.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468014&FileExtension=.PDF&FileName=6-C%20Survival%20Factors%20Factual%20Report%20-%20Attachment%202%20-%20SWAU%20Training%20Staff%20Interviews-Master.PDF
- 7-A Structures Factual Report (item 30, .PDF, 33 photos, 2.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468279&FileExtension=.PDF&FileName=7-A%20Structures%20Factual%20Report-Master.PDF
- 7-B Boeing Supporting Documentation (item 31, .PDF, 757 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468252&FileExtension=.PDF&FileName=7-B%20Boeing%20Supporting%20Documentation-Master.PDF
- 7-C UTAS Supporting Documentation (item 32, .PDF, 925 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468253&FileExtension=.PDF&FileName=7-C%20UTAS%20Supporting%20Documentation-Master.PDF
- 7-D FAA Supporting Documentation (item 33, .PDF, 789 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468254&FileExtension=.PDF&FileName=7-D%20FAA%20Supporting%20Documentation-Master.PDF
- 7 - Structures Report 2 Tech Review Version (item 34, .PDF, 3.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40473755&FileExtension=.PDF&FileName=7%20-%20Structures%20Report%202%20Tech%20Review%20Version-Master.PDF
- 7 - Report from Party - Collins (item 35, .PDF, 7.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40473756&FileExtension=.PDF&FileName=7%20-%20Report%20from%20Party%20-%20Collins-Master.PDF
- 7 - Report from Party - CFM (item 36, .PDF, 4.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40473757&FileExtension=.PDF&FileName=7%20-%20Report%20from%20Party%20-%20CFM-Master.PDF
- 7 - Slat EQA Report (item 37, .PDF, 9.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40473758&FileExtension=.PDF&FileName=7%20-%20Slat%20EQA%20Report-Master.PDF
- 7 - T12 eqa (item 38, .PDF, 6.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40473759&FileExtension=.PDF&FileName=7%20-%20T12%20EQA-Master.PDF
- 7 - Structures Attachment 1 Pressurization System Description (item 39, .PDF, 164 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40473760&FileExtension=.PDF&FileName=7%20-%20Structures%20Attachment%201%20Pressurization%20System%20Description-Master.PDF
- 8 - A Powerplant Group Chairman's Factual Report (item 40, .PDF, 69 photos, 13.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468255&FileExtension=.PDF&FileName=8%20-%20A%20Powerplant%20Group%20Chairman%27s%20Factual%20Report-Master.PDF
- 8 - B CFM Supporting Documentation (item 41, .PDF, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468256&FileExtension=.PDF&FileName=8%20-%20B%20CFM%20Supporting%20Documentation-Master.PDF
- 8 - Powerplants errata (item 42, .PDF, 142 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40474181&FileExtension=.PDF&FileName=8%20-%20Powerplants%20errata-Master.PDF
- 10 - Flight Data Recorder - Factual (item 43, .PDF, 8.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468015&FileExtension=.PDF&FileName=10%20-%20Flight%20Data%20Recorder%20-%20Factual-Master.PDF
- 10 - Flight Data Recorder - Attachment 1 (item 44, .CSV, 57.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468016&FileExtension=.csv&FileName=10%20-%20Flight%20Data%20Recorder%20-%20Attachment%201-Master.csv
- 11 - Maintenance Records (item 45, .PDF, 12.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468017&FileExtension=.PDF&FileName=11%20-%20Maintenance%20Records-Master.PDF
- 12 - Cockpit Voice Recorder Factual (item 46, .PDF, 1.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468280&FileExtension=.PDF&FileName=12%20-%20Cockpit%20Voice%20Recorder%20Factual-Master.PDF
- 15 - Materials Laboratory Factual Report 18-049 (item 47, .PDF, 7.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468018&FileExtension=.PDF&FileName=15%20-%20Materials%20Laboratory%20Factual%20Report%2018-049-Master.PDF
- 17-C Timeline Study (item 48, .PDF, 18 photos, 3.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40468257&FileExtension=.PDF&FileName=17-C%20Timeline%20Study-Master.PDF
- Transcript - Public Hearing (item 49, .PDF, 392 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40472573&FileExtension=.PDF&FileName=Transcript%20-%20Public%20Hearing-Master.PDF
- Party Submission - Boeing (item 50, .PDF, 879 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40478552&FileExtension=.PDF&FileName=Party%20Submission%20-%20Boeing-Master.PDF
- Party Submission - CFM (item 51, .PDF, 932 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40478553&FileExtension=.PDF&FileName=Party%20Submission%20-%20CFM-Master.PDF
- Party Submission - Collins (item 52, .PDF, 980 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40478555&FileExtension=.PDF&FileName=Party%20Submission%20-%20Collins-Master.PDF
- Party Submission - SWA (item 53, .PDF, 334 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40478556&FileExtension=.PDF&FileName=Party%20Submission%20-%20SWA-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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