The Taiwan authorities for flight safety has required China Airlines to suspend operations of all of its Boeing 747-200 planes until they pass safety tests.
The authorities analysis of the company's late plane crash and held that the cause of the accident may have had something to do with the plane's appliances. Due to this assumption, it required China Airlines to suspend operations of planes of the same model.
The company has another three Boeing 747-200 planes, which have operated for 13, 20 and 21 years, respectively.
The authorities found that the crashed plane experienced "inflight breakup," and broke into four large pieces at an altitude of over 30,000 feet.
The authorities said radar record suggested that the plane was broken up by a very strong force, which will remain a mystery until the "black box" is found.