On April 17, 2016, China Airlines scheduled passenger transport flight CI025, a Boeing737-800 aircraft, registration number B-18609, took off from Guam Airport at 1355 Taipei time for Taoyuan Airport. There were 3 flight crew members, 10 cabin crew members and 109 passengers, totally 122 people on board. After the aircraft climbed up to an altitude of 37,000 feet, a caution message of Auto Fail/Unscheduled Pressurization Change showed up on cockpit instruments panel.The flight crew members performed manual control procedures according to Quick Reference Handbook. Due to the cabin altitude rising continually, flight crew members immediately performed emergency descent procedures and put on oxygen masks. The aircraft returned and landed at Guam Airport without further incident.

In accordance with the “Aviation Occurrence Act”, the ASC confirmed that this event is an occurrence. The Investigator-In-Charge and an investigation team was assigned to this investigation.

Further information of the occurrence will be published after the completion of the factual information report.

Sherry Liu, Engineer
Tel: 89127388-330
Email: sherry@asc.gov.tw