Sorry to recover old ground but this is incorrect. Once a pairing is disputed, it will go thru the review process unless withdrawn by the union or resolved. The only time limit is that if a sequence has been flown by an aircraft type for 3 bid periods it can no longer be disputed. It has nothing to do with reserves flying the sequence...that is our MEC's recommendation for a show of support for the SIG. This isn't advocacy (although my opinion is well documented) just info which can be read in the contract.