Final answer:
The Certificate of Airworthiness for an aircraft remains in effect as long as the aircraft is maintained and operated in compliance with aviation regulations and undergoes regular inspections.
Step-by-step explanation:
The Certificate of Airworthiness (CofA) for an aircraft remains in effect under specific conditions set by aviation authorities. The primary condition is that the aircraft must be maintained and operated according to the aviation regulations and the aircraft's maintenance schedule. In addition, the CofA requires periodic inspections, also known as Certificate of Airworthiness Renewal checks, to ensure that the aircraft conforms to safety standards. If at any time the aircraft fails to meet these standards, or if the maintenance is not performed as required, the CofA can be suspended or revoked, making the aircraft unfit for legal flight.