The payouts are "among the highest-ever levels" paid to non-represented employees and engineers and technicians represented by the Society of Professional Engineering Employees in Aerospace (SPEEA).

The bonuses are equivalent to between 6.15 percent and 6.54 percent of the employees' eligible pay from 2013.

For machinists, the payout totals 4 percent of eligible pay. Machinists are represented by the International Association of Machinists.

(Reporting by Alwyn Scott; Editing by Chizu Nomiyama)