Airworthiness requirement about maintenance are various regulations cover design, continued
airworthiness, maintenance technology document, maintenance quality management, maintenance
training and so on. For example, FAR/CCAR25.1529 and appendix H put up the continued airworthiness
document requirements; FAR/CCAR121.367 and FAR/CCAR135.425 put up the aircraft maintenance
program requirements. At the same time, some advisory circulars (AC) were lay down to help carry out
the regulations requirements. For example, CAAC/AC-121-53 (aircraft maintenance program) is set up to
carry out the FAR/CCAR121.367 and FAR/CCAR135.425 requirements. And CAAC/AC-121/135-67
(maintenance review board MRB and maintenance review board report MRBR) help FAR/CCAR121.367
and FAR/CCAR135.425 et al to be carried out. These regulations proposed the airworthiness requirement
about aircraft maintenance including maintenance planning, maintenance training, maintenance
equipment et al.