This represents regulatory requirements for the airworthiness of aircraft operating in the Republic of the Philippines.

The regulatory requirements for the airworthiness of aircraft in the Republic of the Philippines are primarily outlined in CAR Part 5. This part of the Civil Aviation Regulation (CAR) focuses on the standards and procedures that ensure aircraft meet safety and performance criteria necessary for operation. It establishes the regulatory framework that governs the maintenance, operation, and overall airworthiness of aircraft, ensuring that they are safe to fly.

This regulatory framework is critical not just for individual aircraft operators, but also for the safety of passengers and the wider aviation network. Additionally, CAR Part 5 addresses aspects such as the certification of aircraft, maintenance standards, and the qualifications of maintenance personnel, all of which are essential in upholding the integrity of the aviation system in the country. The other parts, while related to different facets of aviation regulations, do not specifically cover airworthiness requirements as comprehensively as Part 5 does.