What was found
TRANSMISSION IS MAKING METAL. TAILROTOR QUILL BEARINGS CAUSE OF METAL CONTAMINATION. SEAL LEAKS. MAIN INPUT R/B QUILL, SYS II HYD QUILL AND AUX JETS ON RING GEAR CASE. ACTION TAKEN: REPAIRED, PARTIALLY DISASSEMBLED, VISUALLY INSPECTED EXPOSED COMP. INSTALLED NEW BEARINGS T/R QUILL AND PACKED WITH GEAR, INSTALLED NEW SEALS, AND GASKET, O RINGS TO REPAIR LEAKS. ALL WORK IAW BHT 412 CR&O.