#ndt Lambda Technologies has begun using its Low Plasticity Burnishing (LPB®) process to extend the fatigue life of the titanium LPC1-2 disk assembly on the F402-RR-408 Pegasus engine. The engine is used for AV-8B and Harrier II. Fretting between the disk post and the LPC1 blade dovetail was causing cracking that lead to premature retirement of the disk.
Previous efforts to mitigate the problem, such as applying an anti-fretting coating, were only partly effective. With LPB, NAVAIR is able to completely elimi