Tall man. CCAR- 147 Designate training institutions for maintenance personnel and manage them; CCAR-66 stipulates how maintenance personnel can obtain the basic license, management license and component maintenance license of maintenance personnel, and manage the maintenance personnel who want to obtain the license. 66 departments mentioned in the license examination requirements that they can take the license examination two years after graduating from junior college or above in civil aviation related majors, but those who participated in the training and graduated from 147 are not subject to this restriction and have high gold content. Civil aircraft maintenance training (referred to as 147 training) is a training mode certified and supervised by civil aviation authorities according to aviation regulations 147, and it is an internationally accepted training channel for civil aviation maintenance personnel. Every country or place has formulated 147 aviation regulations according to its actual situation. At present, the federal aviation regulations FAR- 147 in the United States and the European aviation safety regulations EASA- 147 in Europe have the most extensive influence. China's civil aviation regulations CCAR- 147 are formulated on the basis of fully learning from FAR- 147 and EASA- 147, and combining with the characteristics of China's civil aviation. CCAR- 147 training can be divided into civil aircraft maintenance basic training, civil aircraft model training, civil aircraft parts repair basic training and civil aircraft parts repair project training, among which the basic skills belong to M7 (maintenance basic skills practice) in basic training, and theoretical knowledge needs to be applied to practice finally. The purpose of training is to improve the basic skills of maintenance, so as to ensure the normal operation of the aircraft.