# NTSB ENG12WA017: Boeing 747 - 400, Taoyuan, Taiwan, March 25, 2012

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Foreign investigation
- Date: March 25, 2012, 02:44 local (02:44 UTC)
- Place: Taoyuan, Taiwan
- Location: 25.6300° N, 121.8469° E: Placed by OpenAirDocs from NTSB’s distance and direction from Taiwan Taoyuan International Airport (RCTP), within about 16 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=25.6300&lon=121.8469&mi=10
- Highest injury: No injuries
- Injuries: 383 uninjured
- Status: Led by another country's authority
- NTSB office: Aviation Engineering Division
- Lead agency: Other
- NTSB case key (mKey): 83380
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ENG12WA017
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/83380/pdf
- Page: https://openairdocs.org/ntsb/ENG12WA017

## Factual narrative

On March 25, 2012, at 1044 Taipei local time, a Boeing 747-400 airplane, registration number B-16411, operating as EVA Airways Corporation passenger flight BR702, encountered a left outflow valve malfunction and abnormal cabin altitude during enroute climb. The aircraft returned to Taoyuan International Airport without further incident. The Aviation Safety Council (ASC) of Taiwan investigated the incident. All inquiries concerning this accident should be directed to the ASC at: Aviation Safety Council 11th Floor, 200, Section 3 Beixin Road, Xindian District New Taipei City 231, Taiwan (R.O.C.) The final report number is ASC-AOR-13-03-001. The report (in Chinese only) can be downloaded at the ASC website, www.asc.gov.tw.

## Aircraft

- Registration: B-16411 (not matched to a registry record)
- Reported make and model: BOEING 747 - 400
- Category: Airplane
- Serial number: 29111
- Engines: turbo fan; turbo fan; turbo fan; turbo fan
- Damage: No damage
- Operator: EVA Airways
- Airworthiness certificate: Certificate of authorization or waiver (COA)
- Departed: RCTP, Taoyuan
- Destination: ZSPD, Shanghai Pudong
- Airport: RCTP, Taoyuan International Airport

## Weather



From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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