What is the purpose of the 4790/158 form?

The 4790/158 form, also known as the Plane Captain Designation, serves as an official document that assigns a qualified individual the specific responsibilities of a Plane Captain. This is a critical role in aircraft maintenance and readiness, as the Plane Captain is responsible for ensuring that all pre-flight inspections, daily checks, and maintenance are accomplished properly. The form verifies that the individual has the required qualifications and training to carry out these duties, which are vital for the safe operation of the aircraft. It acts as a means to maintain accountability and high standards of safety and performance within aviation operations.