How long is a temporary flight engineer certificate effective?

A temporary flight engineer certificate is effective for 120 days. This duration allows individuals who have successfully completed the necessary training and examination to operate an aircraft as a flight engineer while they await the issuance of their permanent certificate. It provides a reasonable period for processing and ensures that those who have met the requirements can begin working in their capacity without undue delay. Understanding the validity period of the temporary certification is important for flight crew management and compliance with regulatory requirements.