What is the basic standard for any aircraft structural repair?

The fundamental standard for any aircraft structural repair is that the repair must be as strong as the original structure. This principle is vital in maintaining the safety and integrity of an aircraft. Aircraft are designed with specific structural integrity to withstand various forces during flight, and any repair must not compromise that integrity.

Ensuring that repairs match or exceed the original strength keeps the aircraft safe and operational, adhering to aviation regulations and standards. This standard protects against failures that could arise from weakened structures, which might lead to catastrophic incidents in flight.

While there are important factors such as cost and completion time to consider in repair decisions, these do not override the necessity for strength in ensuring the aircraft remains safe for operation. Additionally, repairs that do not alter the design are also critical, but the primary concern must always be about maintaining or enhancing the strength involved in the structural integrity of the aircraft.