Where is the entry for a completed 100-hour inspection recorded if separate maintenance records are kept?

The correct answer is that the entry for a completed 100-hour inspection is recorded in each relevant record. This approach ensures a comprehensive documentation of the inspection across all applicable maintenance records, which typically include the airframe record, the powerplant record, and any other pertinent records.

Recording the inspection in each relevant record is essential for maintaining a complete history of the aircraft's maintenance. It allows for easy tracking of compliance with maintenance requirements and ensures that all parts of the aircraft are documented as having undergone the necessary inspection, thus enhancing safety and accountability.

A single entry in only the airframe or powerplant record would not provide the complete picture required for regulatory compliance and may lead to gaps in maintenance records where other components or systems are concerned. Similarly, recording the inspection solely in a general maintenance log could risk losing critical information about specific parts of the aircraft that require detailed attention. Thus, documenting in each relevant record is both a best practice and a regulatory requirement for ensuring the aircraft's airworthiness.