Thrush 510P models have a wing spar life of 29,000 hours. The 510G’s wing spar life is 60,000 hours. And the 710P has a spar life of 26,000 hours. A lifetime each, by any measure. Even more impressive, there hasn’t been a single FAA Airworthiness Directive issued against the wings or wing spars on a Thrush aircraft built since 2000. That means you can be confident you’ll get more days flying and working out of a Thrush – which, after all, is why you buy an ag airplane in the first place.