from Aircraft Maintenance Technology
Doing things before problems occur in an effort to prevent inopportune failures? What a concept! The term "preventive maintenance" does have an official definition as well as implications assigned by the U.S. Federal Aviation Administration. According to the Administrator: "Preventive maintenance means simple or minor preservation operations and the replacement of small standard parts not involving complex assembly operations." This definition has been tweaked a bit to enable pilots to perform certain functions on their aircraft and the guidelines are presented in Federal Aviation Regulation 43.3.
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