Following a major repair that significantly changes flight characteristics, what must be entered in the aircraft records?

After a major repair that significantly alters flight characteristics, it is essential to conduct a flight test to verify that the aircraft performs safely and in accordance with its designed specifications. The record of the flight test must be entered into the aircraft records to document that this verification was carried out. This entry serves as evidence that the aircraft has been tested following the major repair and that the repairs did not adversely affect its flight capabilities.

Documenting the results of the flight test in the aircraft records is crucial for maintaining accurate logs of the aircraft’s modifications and ensuring compliance with regulatory requirements. This record not only provides safety assurances and operational information but also helps future maintenance personnel understand the aircraft's current state.

The other options, while relevant in different contexts, do not specifically address the requirement for documenting flight characteristics changes following a major repair. For instance, a supplemental type certificate number relates to FAA approval for modifications that may affect the type certification of an aircraft but does not itself record the flight test results. Service bulletins typically inform maintenance personnel of recommended inspections or repairs related to a specific issue but are not required to document flight tests. Logbook entries are important for tracking aircraft maintenance history but, in this context, the specific data regarding the flight test is the necessary record to maintain after