Finnair has grounded several of its Airbus A320 family aircraft, including eight Airbus A321-200s, after concerns arose over the safety of a seat-cleaning method involving water. The Finnish airline announced that the safety of this water-washing technique, particularly in relation to the seat manufacturer’s fire protection standards, has not been fully verified. This precautionary measure led to the cancellation of about 20 flights on October 13, 2025, with further disruptions expected through October 14.
The affected aircraft represent half of Finnair’s A321-200 fleet. The airline typically uses these planes for short and medium-haul routes across Europe from its Helsinki hub. Each A321-200 can carry up to 209 passengers in a single-class configuration, and the average age of these aircraft is just over 12 years.
Finnair explained that if water-based cleaning is not performed correctly, it could damage seat upholstery or reduce the effectiveness of flame-retardant materials used in seats. In its statement, the company said: “Safety is always our top priority, and we always follow the manufacturers’ maintenance instructions as well as the guidelines and recommendations of the authorities.”
Passengers affected by cancellations are being offered alternative travel options. Those who missed connecting flights will be rebooked, while others can request refunds or receive accommodation as needed.
Industry sources note that most modern aircraft seats use synthetic fabrics such as polyester or nylon blends for durability and flame resistance. Seat cushions are often made from polyurethane foam, which must be treated or paired with fire-resistant materials to meet safety regulations.
Cleaning practices for aircraft interiors vary by material. For example, leather seats require specific products and techniques to preserve their condition and ensure longevity. Deep cleaning routines usually occur every 30 to 45 days, while major maintenance checks—known as C Checks—take place roughly every 18 months based on flight hours.
Since the COVID-19 pandemic, airlines have promoted enhanced cleaning protocols, though many have scaled back these measures as passenger volumes recover. Some airlines continue to maintain certain hygiene upgrades, such as hands-free door handles in lavatories, but others have reverted to pre-pandemic cleaning schedules as operational priorities shift back toward efficiency and cost management.
