Is an extension of the TBO safe?

Both Pratt and Whitney and Williams International have been offering TBO extensions to fleet operators or PBTH (power by the hour) subscribers for years based on the same concepts that SkyWay has incorporated into the FLEX program. SkyWay has been operating engines in the past under this program with excellent success. When properly maintained and monitored under the SkyWay FLEX program an operator can be assured of safe operation throughout the extended TBO period.