What should be entered as the serial number on the AFTO Form 781A?

• A. Only the last four digits
• B. The aircraft's full identification number, e.g., 85-1428
• C. Just the model number
• D. The date of manufacture

Answer: (B)

The serial number that should be entered on the AFTO Form 781A is the aircraft's full identification number, such as 85-1428. This number is critical for accurately tracking the specific aircraft within the fleet. The full identification number provides a unique reference that distinguishes one aircraft from another, which is essential for maintenance records, operational history, and logistical support.

Using only the last four digits would not provide the necessary specificity, as multiple aircraft could share the same last four digits but differ in other parts of their identification numbers. Entering just the model number would lack the level of detail needed to associate the record with the correct aircraft in a fleet context. Including the date of manufacture is also irrelevant for the serial number entry, as it does not identify the aircraft but rather provides historical context.

Therefore, the correct approach is to provide the full identification number, ensuring that each entry can be precisely tied to the aircraft's overall maintenance and operational tracking.