Summary
- An ANA Wings Boeing 737-800 lost cabin pressure in the middle of a flight between Nagasaki Airport (NGS) and Nagoya Chubu Centrair International Airport (NGO).
- The Japan Transport Safety Board (JTSB) stated that it will investigate the incident, with the board stating that when the aircraft descended to around 10,000 ft (3,048 m), the cabin pressure nornalized.
- Local media reports pointed out that 11 people reported feeling unwell following the incident.
An ANA Wings, which is a subsidiary of All Nippon Airways (ANA), Boeing 737-800, suffered a loss of cabin pressure as it was operating a domestic flight in Japan. The aircraft was forced to declare an emergency before it landed at Nagoya, Japan.
Loss of cabin pressure
According to an incident overview of the incident by the Japan Transport Safety Board (運輸安全委員会, JTSB), a division of the Japanese Ministry of Land, Infrastructure, Transport, and Tourism (国土交通省, MLIT), the event happened on June 22.
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The incident involved an ANA Wings Boeing 737-800, registered as JA88AN, which was operating ANA flight NH372 from Nagasaki Airport (NGS) to Nagoya Chubu Centrair International Airport (NGO). The JTSB stated that during the descent, the aircraft’s pressurization system suffered a problem, causing a loss of cabin pressure. As a result, the flight crew was forced to descend to a lower altitude.
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Declaring an emergency
The JTSB pointed out that the pilots had to declare an emergency and descend to a lower altitude. According to Flightradar24 records, the flight, which departed NGS at 9:47 local time (UTC +9), climbed to an initial cruising altitude of 27,000 feet (8,229 meters) at 10:00.
Just three minutes later, the aircraft increased its cruising altitude to 31,000 ft (9,448 m), keeping that altitude between 10:05 and 10:23. However, it began descending immediately after, and several minutes into its descent, the flight crew squawked 7700, which is the code for a general emergency onboard an aircraft.
By 10:34, the ANA Wings Boeing 737-800 stabilized at 10,125 ft (3,086 m) before it began descending once again at 10:38. Around 20 minutes later, the narrowbody aircraft landed at NGO, completing the itinerary on time.
The JTSB highlighted that once the aircraft was at around 10,000 ft (3,048 m), the cabin pressure stabilized, and the flight crew rescinded the emergency declaration. However, the agency will still investigate the incident.
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Feeling unwell
In addition, as reported by Japan’s NHK, seven passengers and four crew members reported that they felt unwell following the flight, with the oxygen masks being deployed in the cabin. In total, there were 104 people onboard the ANA Wings Boeing 737-800.
Photo: Sudpoth Sirirattanasakul | Shutterstock
In a statement to NHK, ANA said that it deeply apologizes to its customers and the involved parties for the concern and inconvenience that the incident has caused, with the airline promising to fully cooperate with the JTSB’s inquiry into the event. The safety board classified it as a serious incident.
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