Usar "complementam" OU "aprofundam".

Observar a definição técnica, com atenção especial ao trecho destacado:
"A typical maintenance schedule for a commercial aircraft is made up of a series of "alphabet" checks that comply with federal rules. Each check is progressive, that is a B-check includes everything done in an A-check, plus more."

Na mesma lógica:
"The B Check, which is no longer employed in many inspection programs, involves more in-depth servicing and testing."