EASA SIB AV-2008-07
Pratt & Whitney Canada PW530, PW535 and PW545 series engines - No.4 Bearing Carbon Seal Distress
Transport Canada Service Difficulty Advisory AV-2008-07 addresses a low oil pressure issue in Pratt & Whitney Canada PW530, PW535, and PW545 series engines, specifically related to distress of the No. 4 bearing carbon seal. The advisory highlights occurrences of in-flight engine shutdowns due to oil leakage past the carbon seal on the #4 turbine shaft bearing, affecting aircraft such as the Cessna Citation 560XLS powered by PWC 545B engines.
Safety Information BulletinMaintenanceSafety MgmtCessna Citation 560XLS