# NTSB DCA24FA300: Boeing 737-9, N919AK, Nashville, TN, September 12, 2024 - Type: NTSB incident investigation - Classification: Incident · No injuries · Class 3 · Field · Preliminary report - Date: September 12, 2024, 09:14 local (14:14 UTC) - Place: Nashville, TN - Coordinates: 36.129555, -86.680054 - Nearby events: https://openairdocs.org/map.md?lat=36.1296&lon=-86.6801&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff-rejected takeoff: Runway incursion veh/AC/person](https://openairdocs.org/ntsb-events/320) - Highest injury: No injuries - Injuries: 317 uninjured - Status: Investigation ongoing - Investigation class: Class 3 - NTSB office: Major Investigations Division - Parties: Southwest Airlines, Alaska Airlines, FAA AVP-110, ALPA, SWAPA, Boeing, NATCA - NTSB case key (mKey): 195112 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DCA24FA300 - NTSB preliminary report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/195112/pdf - Page: https://openairdocs.org/ntsb/DCA24FA300 ## Preliminary report (aircraft 1) On September 12, 2024, about 0914 central daylight time (CDT), Alaska Airlines flight 369 (ASA369), a Boeing 737-900, N919AK, rejected their take-off on runway 13 at Nashville International Airport (BNA), Nashville, Tennessee, when Southwest Airlines flight 2029 (SWA2029), a Boeing 737-700, N225WN, crossed the runway at taxiway T5 . There was no damage to the airplanes nor injuries to crew or passengers onboard either airplane. ASA369 was operating under the provisions of Title 14 Code of Federal Regulations Part 121 as a scheduled domestic passenger flight from BNA to Seattle-Tacoma International Airport (SEA), Seattle, Washington. SWA2029 was operating under Title 14 Code of Federal Regulations Part 121 as a scheduled domestic passenger flight from BNA to Jacksonville International Airport (JAX), Jacksonville, Florida. The NTSB was notified of the incident and operations, air traffic control (ATC), human factors, aircraft performance, flight data recorder (FDR), and cockpit voice recorder (CVR) specialists were assigned. The ATC group convened at the BNA air traffic control tower the week of September 16th to conduct interviews, review documentation and data. Parties to the investigation are the Federal Aviation Administration (FAA), National Air Traffic Controller Association (NATCA), Alaska Airlines, Southwest Airlines, Air Line Pilots Association (ALPA), Southwest Airlines Pilots Association (APA), and Boeing Commercial Airplanes . History of Flight The following timeline (Table 1) was constructed from certified ATC audio re-recordings and automatic dependent surveillance- broadcast (ADS-B) data provided by the FAA. All times are in CDT. A graphical depiction of the event location with the path of the involved aircraft is shown on an overlay of a Google Earth image in figure 1. Time Event 0912:11 Local Controller instructed the flight crew of ASA369 to line up and wait on runway 13 with good read back. 0913:01 SWA2029 flight crew contacted Ground Controller. 0913:05 Ground Controller instructed flight crew of SWA2029 to proceed to runway 20C, and to cross runway 13 at taxiway T5. 0913:13 Flight Crew of SWA2029 correctly read back the taxi instructions to Ground Controller. 0913:28 Local Controller cleared ASA369 for take off on runway 13 with good read back. 0914:30 The flight crew of ASA369 reported to Local Controller that they were aborting, followed by the Local Controller canceling takeoff clearance. 0915:10 Local Controller asked the flight crew of ASA369 if they were able to exit on Taxiway 4 and they responded yes. Table 1. Timeline of events. Figure 1. A graphic depicting the event with ground track of involved aircraft. ASA369 exited runway 13 on taxiway T4 and proceeded to the gate area. While ASA369 was waiting for an open gate, fuse plugs deflated all four main landing gear tires. Passengers were deplaned via air stairs on the ramp. SWA2029 taxied to runway 20C, received takeoff clearance and departed BNA for JAX. The FDR andCVR were retrieved from the Alaska Airlines airplane, and the FDR was retrieved from the Southwest Airlines airplane. The CVR from the Southwest Airlines airplane had been overwritten. All the recorders were sent to the NTSB Vehicle Recorder Laboratory, and data has been retrieved from all the recorders. The Operations Group will be performing interviews of both flight crews involved in the incursion. The investigation continues. ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Takeoff-rejected takeoff: Runway incursion veh/AC/person](https://openairdocs.org/ntsb-events/320) (defining event), aircraft 1; cases with it: [Boeing 737-9, 1 case](https://openairdocs.org/ntsb-events/320/sequence.md?model=138470A), [All aircraft, 104 cases](https://openairdocs.org/ntsb-events/320/sequence.md) ## Aircraft 1 - Registration: [N919AK](https://openairdocs.org/aircraft/N919AK), registered now, S/N 44087, built 2021 (OpenAirDocs) - Reported make and model: BOEING 737-9 - Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (registry code 138469A) (OpenAirDocs) - Registry engine: [CFM International LEAP-1B28 series](https://openairdocs.org/engine/cfm-international-leap-1b28-series) (registry code 13120, turbo-fan) (OpenAirDocs) - Category: Airplane - Serial number: 44087 - Year built: 2021 - Damage: Minor damage - Flight: Part 121 - Operator: Alaska Airlines Inc - Registered owner: Alaska Airlines Inc - Destination: SEA, Seattle, WA - Airport: BNA, Nashville Intl, runway 13/31, 11,030 × 150 ft, concrete ## Aircraft 2 - Registration: [N225WN](https://openairdocs.org/aircraft/N225WN), registered now, S/N 34333, built 2005 (OpenAirDocs) - Reported make and model: BOEING 737-7H4 - 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: 34333 - Year built: 2005 - Damage: No damage - Flight: Part 121 - Operator: Southwest Airlines Co - Registered owner: Southwest Airlines Co - Destination: JAX, Jacksonville, FL ## Weather - Conditions: Day - Wind: 100° at 11 knots - Visibility: 10 statute miles - Lowest ceiling: 19,000 ft broken - Temperature: 75 °F, dew point 52 °F - Altimeter: 30.01 inHg - Observed at: KBNA, 1 nm away - METAR: METAR KBNA 121353Z 10011KT 10SM SCT075 BKN190 OVC250 24/11 A3001 RMK AO2 SLP157 T02390111= ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Incident 20240912019789I](https://openairdocs.org/incident/20240912019789I), Sep 12, 2024: Boeing 737-9, Nashville, TN, No damage. [privacy data omitted] 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.