This book was born from the desire to share some of the experiences gained in 20 years of profession in the aeronautical world. The reader has the opportunity to read some examples of implementation methods, illustrated in a clear and simple way, which, once applied as described, allow to demonstrate to be “Compliant” with the requirement. From the Design of an aeronautical part, to the management of the “Airworthiness”, passing through the “Safety” environment, arriving at the maintenance, all monitored by the Auditor for the Compliance Evaluation. An otherwise arduous and tiring path for the solitary neophyte, because it is fed by a whole series of regulations, rules not readily available; but also, an opportunity for all experts to deepen the many aspects and skills required in the constantly evolving aeronautical context