Final answer:
The flight line expediter is required to be notified of all back ordered parts in accordance with AFI21-102.
Step-by-step explanation:
In accordance with AFI21-102, the flight line expediter is responsible for being notified of all back ordered parts. This means that anyone who is aware that a part is on back order should inform the flight line expediter. It is important to notify the expediter to ensure that necessary arrangements are made to obtain the part or find an alternative solution.