If a mechanic replaces the engine on a Cessna 182 with another listed on the TCDS, what must they complete?

When a mechanic replaces the engine on a Cessna 182 with another engine that is listed on the Type Certificate Data Sheet (TCDS), the correct procedure involves recognizing that this is a major alteration due to the nature of the work being done. Therefore, simply completing a logbook entry is not sufficient or appropriate for a major alteration.

In this situation, the correct process requires the mechanic to complete a Form 337 to document the major alteration. This form serves as a record of significant changes made to an aircraft that can affect its type design. Approval from an Inspection Authorization (IA) is also necessary, as the IA has the authority to review and approve such alterations. The emphasis on both the Form 337 and the approval signifies the importance of adhering to regulatory standards in maintaining aircraft safety and airworthiness.

While notifying the manufacturer might be relevant for warranty concerns, it is not a regulatory requirement for the alteration process itself. Therefore, completing a logbook entry alone does not encompass the necessary steps for a significant and regulated alteration such as an engine replacement.