NOT phosphate coated Rectangular Ring
in 915iS Technical Questions
one hour ago
Piston ring replacement needed per the annual condition inspection checklist?
915 MML Rev. 3, May 01 2025, 05-20-00 page 9.
Section 2) Differential pressure check:
"...If equipped with part number 815253 rectangular ring... (NOT phosphate coated). Engine serial number affected:... 9122005 up to 1004312 inclusive. Please check your maintenance logs to verify if the rectangular ring was changed during maintenance/service or overhaul.
I can't find any other info or bulletin about this. I've got a serial number that apparently needs new rings. Any updates, advice or recommendations on who to contact?
