What does the date on the opening page of a Type Certificate Data Sheet signify?

The date on the opening page of a Type Certificate Data Sheet (TCDS) signifies both the last revision date and the revision date of page 1, reflecting when the current version of the document was last updated. This date is vital for users, as it indicates that the information provided in the TCDS is current and includes any amendments or changes noted up to that point. In aviation, adhering to the most current data is crucial for safety, regulatory compliance, and technical accuracy.

Understanding this date is important because it informs manufacturers, maintenance professionals, and inspectors about the reliability of the data they are referencing, ensuring that they are working with the most accurate and up-to-date information regarding the type certification of the aircraft or component in question.