The Probable Cause read: The flight crew of flight 129 performed the circling approach, not being aware of the weather minima of wide-body aircraft (B767-200) for landing, and in the approach briefing, did not include the missed approach, etc., among the items specified in Air China’s operations and training manuals.
As causas probables son: A tripulación do voo 129 realizou a aproximación circular, non sendo consciente dos mínimos meteorolóxicos dos avións de fuselaxe ancha (B767-200) para aterrar, e no briefing da aproximación non se incluía a aproximación frustrada entre os elementos especificados nos manuais de operación e adestramento de Air China.