The collection and analysis of operational data has determined the failure distribution of wheel…

The collection and analysis of operational data has
determined the failure distribution of wheel brakes on carrier-based aircraft
to be lognormal with s = 1.7 and tmed = 8S00 landings. The brake manufacturer
recommends replacement after 2000 landings. Determine

(a) The reliability at 2000 landings

(b) The replacement interval if a 0.99 reliability is
desired