Again you should check with your business agent and see what they say since I do not know your exact situation but:
Article 41 section 2
(b) No employee shall be required to complete a full-time progres- sion more than one (1) time even if he or she transfers between full-time jobs except as set forth in this paragraph. The sole excep- tion is when an employee is awarded a package car or feeder driv- er job and has not previously held a full-time job which includes driving duties. In such event, the employee will have a break-in rate equal to the employee’s current wage rate until six (6) months from the date the employee entered the job. The employee will then go to the prevailing top rate. A part-time air driver who has completed the Article 40 progression, bids a full-time inside job and then a driver job within two (2) years shall have the same break-in period.