EASA SIB SAIB-2025-06
High Pressure Turbines
The FAA Special Airworthiness Information Bulletin SAIB: 2025-06 provides information regarding a failure mode in the high pressure turbine (HPT) of Pratt & Whitney Division Model PW4050, PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4152, PW4156, PW4156A, PW4158, PW4160, PW4460, PW4462, and PW4650 engines. This bulletin alerts operators and maintainers about the potential for coating spalling on the 2nd stage HPT blade outer air seal leading to component failures but does not mandate any regulatory action. It references previous service bulletins and airworthiness directives related to similar issues.
Safety Information BulletinMaintenanceSafety MgmtPratt & Whitney PW4000