Aircraft mechanics and related maintenance workers for US Airways on Tuesday ratified a three-year agreement covering 3,300 workers, including about 750 in Pittsburgh. Nearly two-thirds of the International Association of Machinist members voted in favor of the contract, which becomes amendable at the end of 2011.

The contract is the second major pact to be ratified since US Airways merged with America West in September 2005. Passenger-service and reservations agents agreed to a new contract in June 2006.

The IAM agreement raises former America West employees' pay to that of their counterparts in the east, then immediately increases all 3,300 workers' pay by 10 percent, followed by 3 percent increases in each of the next three years.