# NTSB DCA21WA202: Boeing 737-824, N36272, Mexico City, Mexico, July 29, 2021

- Type: NTSB incident investigation
- Classification: Incident · Class 5 · Foreign
- Date: July 29, 2021, 05:00 local (05:00 UTC)
- Place: Mexico City, Mexico
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Defining event: [Approach: Near midair/TCAS alert/loss of separation](https://openairdocs.org/ntsb-events/260)
- Status: Led by another country's authority
- Investigation class: Class 5 - No publish
- NTSB office: Major Investigations Division
- Lead agency: Other
- NTSB case key (mKey): 103656
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DCA21WA202
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/103656/pdf
- Page: https://openairdocs.org/ntsb/DCA21WA202

## Sequence of events

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

- [Approach: Near midair/TCAS alert/loss of separation](https://openairdocs.org/ntsb-events/260) (defining event); cases with it: [Boeing 737-824, 3 cases](https://openairdocs.org/ntsb-events/260/sequence.md?model=13844BZ), [All aircraft, 96 cases](https://openairdocs.org/ntsb-events/260/sequence.md)

## Aircraft

- Registration: [N36272](https://openairdocs.org/aircraft/N36272), registered now, S/N 31590, built 2001 (OpenAirDocs)
- Reported make and model: BOEING 737-824
- Registry model: [Boeing 737-824](https://openairdocs.org/model/boeing-737-824) (registry code 13844BZ) (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: 31590
- Year built: 2001
- Damage: No damage
- Flight: Part 121
- Operator: United Airlines

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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