# NTSB DCA26WA020: Boeing 737, Bintulu, Malaysia, October 21, 2025

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Class 5 · Foreign
- Date: October 21, 2025, 02:10 local (02:10 UTC)
- Place: Bintulu, Malaysia
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Defining event: [Enroute-cruise: Pressure/environ sys malf/fail](https://openairdocs.org/ntsb-events/331)
- Highest injury: No injuries
- Injuries: 117 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): 201931
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DCA26WA020
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/201931/pdf
- Page: https://openairdocs.org/ntsb/DCA26WA020

## Sequence of events

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

- [Enroute-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: 9M-MXR (not matched to a registry record)
- Reported make and model: BOEING 737 (8H6)
- Category: Airplane
- Damage: No damage
- Flight: Part 129
- Operator: Malaysia Airlines
- Registered owner: EINN Volant Aircraft

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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