High service time stage-2 LP turbine blades were susceptible to a reduction in fatigue endurance as a result of vibratory stresses sustained during operation at speeds close to the maximum.
Will ultimately reduce the likelihood of LP2 blade failures. In the meantime, the risk of another complex failure is very low.
The manufacturer is recommending that operators replace high service time stage-2 LP turbine blades.
Replacment of high time blades should reduce the likelihood of blade failure.
