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Releases Final Report of China Airlines Flight CI122 Occurrence Investigation

Publication Date 2020-06-03
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The Taiwan Transportation Safety Board (TTSB) releases final report on the  investigation of China Airlines flight CI122, the aircraft during the returning flight, the flight crew had declared emergency 2 times on low fuel condition to the Air Traffic Control. 

On March 9th, 2019, China Airlines flight CI122, a Boeing B747-400 aircraft, registration number B-18211, departed from Taiwan Taoyuan International Airport to Japan Naha International Airport for a schedule passenger flight. There were a Captain, a first officer, 18 cabin crewmembers, 361 passengers, a total of 381 people on board. After the flight crew attempted to land the aircraft at Runway 18 of Naha International Airport and conducted two times missed-approach, the flight crew decided to fly back to Taoyuan International Airport. During the returning flight, the flight crew had declared emergency on low fuel condition to the Kobe Control Center and the Taipei Approach Control respectively. The aircraft safely landed at Runway 05 left of Taoyuan International Airport with no further event.

According to the Transportation Occurrence Investigation Act of the Republic of China, and the content of Annex 13 to the Convention on International Civil Aviation, the Taiwan Transportation Safety Board (TTSB), an independent transportation occurrence investigation agency, was responsible for conducting the investigation. The organizations invited to participate in this investigation included: Civil Aeronautical Administration and China Airlines.

Findings Related to Probable Causes:

The occurrence aircraft landed at Taoyuan International Airport in low fuel emergency condition was due to a combination of the unpredictable increasing taxi time during departure at Taoyuan International Airport, the flight crew conducted two times missed-approach during inbound to Naha International Airport, and the special air traffic control characteristic of Naha International Airport approach procedure.

Findings Related to Risk


Transportation Safety Recommendations



Full Final Report is in Chinese only and available for download at



Sherry Liu, Safety Investigator

Tel: 89127388-6286


Last updated 2020-06-03
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