# NTSB DCA21WA041: Boeing 757, N6706Q, Silao, Mexico, December 1, 2020

- Type: NTSB incident investigation
- Classification: Incident · Class 5 · Foreign
- Date: December 1, 2020, 10:40 local (10:40 UTC)
- Place: Silao, Mexico · MMLO
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Defining event: [Enroute: Pressure/environ sys malf/fail](https://openairdocs.org/ntsb-events/331)
- 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): 102375
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DCA21WA041
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/102375/pdf
- Page: https://openairdocs.org/ntsb/DCA21WA041

## Sequence of events

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

- [Enroute: Pressure/environ sys malf/fail](https://openairdocs.org/ntsb-events/331) (defining event); cases with it: [Boeing 757-232, 1 case](https://openairdocs.org/ntsb-events/331/sequence.md?model=1384965), [All aircraft, 116 cases](https://openairdocs.org/ntsb-events/331/sequence.md)

## Aircraft

- Registration: [N6706Q](https://openairdocs.org/aircraft/N6706Q), registered now, S/N 30422, built 2000 (OpenAirDocs)
- Reported make and model: BOEING 757 (232)
- Registry model: [Boeing 757-232](https://openairdocs.org/model/boeing-757-232) (registry code 1384965) (OpenAirDocs)
- Registry engine: [Pratt & Whitney PW2037](https://openairdocs.org/engine/pratt-whitney-pw2037) (registry code 52117, turbo-fan) (OpenAirDocs)
- Category: Airplane
- Serial number: 30422
- Damage: No damage
- Flight: Part 121
- Operator: Delta 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.

---
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.