一、背景1991－1995年南方航空公司B737－200机队期满遍祖时，由于以前人们对航材适航管理（即附件证件的合格性管理）的意识淡薄，对装机附件的证件管理不重视，加之其机队已运营了十几年，致使许多无证附件装机使用。在退税时南方航空公司（下称南航）为满足退租飞机会同的要 I. Background From 1991 to 1995, when the fleet of China Southern Airlines B737-200 flew over time, due to the weak awareness of aviation airworthiness management (that is, the compliance management of attachment documents) in the past, the document management of installed attachment was not managed Attention, coupled with its fleet has been operating for more than 10 years, resulting in many undocumented accessories installed use. In the tax rebate when the Southern Airlines (hereinafter referred to as China Southern Airlines) to meet the requirements of the same charter flights