TAIPEI (Bloomberg) -- China Airlines, Taiwan's largest air carrier, said it has tightened nuts in its 13-plane fleet of Boeing Co. 737-800s and the planes are safe to fly.

The airline found 100 nuts in its own and subsidiary Mandarin Airlines' 13 Boeing 737-800s were below U.S. Federal Aviation Administration's standard torsion values, Bruce Chen, deputy spokesman of the Taipei-based company, said by telephone Sunday.
“We've solved this problem,” Chen said. “There's no safety concern.”
A China Airlines Boeing 737-800 burst into flames at Japan's Naha Airport on Aug. 20. The carrier inspected all its planes of the same model as required by the FAA and Taiwan's Civil Aeronautics Administration.
All 165 people onboard escaped from the burning plane last month. A loose bolt may have made a hole in the aircraft's fuel tank that caused the fire, Agence France-Presse reported Aug. 23, citing investigator Kazushige Daiki.
The FAA ordered airlines to inspect wing slats on some newer Boeing 737 models after the accident, China Airlines said in an e-mail statement last Monday.
In a service letter last year, Boeing warned of possible loose nuts and recommended inspections in regular checkups, Chen said Sunday