# NTSB DCA23WA463: Boeing 737, Guayaquil, Ecuador, September 24, 2023

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Class 5 · Foreign
- Date: September 24, 2023, 18:30 local (18:30 UTC)
- Place: Guayaquil, Ecuador
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Defining event: [Enroute-climb to cruise: Pressure/environ sys malf/fail](https://openairdocs.org/ntsb-events/331)
- Highest injury: No injuries
- Injuries: 36 uninjured
- 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): 193145
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DCA23WA463
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/193145/pdf
- Page: https://openairdocs.org/ntsb/DCA23WA463

## Sequence of events

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

- [Enroute-climb to cruise: Pressure/environ sys malf/fail](https://openairdocs.org/ntsb-events/331) (defining event); cases with it: [All aircraft, 116 cases](https://openairdocs.org/ntsb-events/331/sequence.md)

## Aircraft

- Registration: HC-CUH (not matched to a registry record)
- Reported make and model: BOEING 737 (5Y0)
- Category: Airplane
- Serial number: 24900
- Damage: No damage
- Flight: Part 121
- Operator: Aeroregional
- Registered owner: Aeroregional

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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