Technical Information - ENGINE OVERSPEED SHUTDOWN SYSTEM

/ STX Service Americas, LLC/

This service letter contains important information regarding the in-troduction of an improved solenoid valve for the overspeed protection system 

of the above-mentioned engine types and for easy verification of the function of the secondary air-operated over speed shutdown system, Work card M5090105-14 (Function test of shutdown) has been updated.  

Please discard the previous version and insert this one in your instruction manual. 

For details, please refer to the MES service letter No.: SL2023-750/JNN “engine over speed shutdown system” enclosed. 

Action code: at first opportunity

If you have questions for this technical bulletin, please contact us at any time.