What information is required to be documented in a maintenance record entry according to the regulations?

The correct answer highlights the importance of compliance with airworthiness standards in maintenance record entries. Maintenance records serve as a critical aspect of ensuring that aircraft are safe, reliable, and in a condition for safe operation. According to regulatory requirements, it is essential to document whether the maintenance performed meets the airworthiness standards set forth by aviation authorities.

This includes confirming that all repairs, alterations, and inspections comply with established regulations to assure continued airworthiness. Incorporating this information ensures that according to the regulations, if an issue arises, there is clear documentation that the aircraft has undergone proper maintenance in adherence to safety requirements.

In context, while all the options provided can be relevant in maintaining aircraft, not all of them are mandated for compliance in the same way. For instance, details of inspections performed can be part of maintenance records but are not the primary focus required to demonstrate compliance with airworthiness. Similarly, a log of flight hours may provide useful information regarding the aircraft's usage but does not directly connect to compliance with safety standards. While having the manufacturer's contact information is useful for technical support and other inquiries, it is not a requirement for maintenance record entries concerning regulatory compliance.