EASA SIB NE-09-31R1
Hawker Beechcraft Model 60 "Duke" aeroplanes with Lycoming TIO-541-E1C4 engines - Kelly Aerospace Energy Systems (KAES) T1879 Rebuilt Turbocharger
Summary
The Special Airworthiness Information Bulletin SAIB NE-09-31R1 provides information regarding the Hawker Beechcraft Model 60, 60A, and 60B (Duke) aircraft equipped with Lycoming TIO-541-E1C4 engines. It addresses a potential issue with the Kelly Aerospace Energy Systems (KAES) rebuilt T1879 turbocharger, part number 407540-9003, serial number JAR00401. The bulletin informs operators about a production discrepancy affecting this specific turbocharger model.
What Changed
This revised SAIB corrects the serial number of the affected KAES T1879 turbocharger and alerts owners and operators to a potential discrepancy involving a backplate machined without an oil galley adjacent to the thrust bearing. The bulletin updates previous information but does not introduce mandatory regulatory action or an airworthiness directive.
Why It Matters
This information is important for aviation professionals because the affected turbocharger may experience functional and durability issues such as reduced engine performance, unstable turbocharger operation, and shortened component life. Operators and maintenance personnel need to be aware of these potential issues to maintain aircraft performance and reliability.
What To Do
Owners and operators of Hawker Beechcraft Model 60 series aircraft with Lycoming TIO-541-E1C4 engines should inspect their aircraft to determine if the turbocharger with part number 407540-9003 and serial number JAR00401 is installed. If found, it is recommended to replace the turbocharger with a serviceable unit as soon as possible. No specific compliance deadline is mandated.
AI-generated summary from official EASA source document. Always verify against the original.