What was found
ENROUTE, LEFT ENGINE ROLLED BACK TO SUB-IDLE ON ROLLOUT. AFTER LANDING, LT ENGINE DROPPED OFFLINE. LT ENGINE OIL PRESSURE 10 PSI (RED). LT ENGINE SHUTDOWN. REPLACED BVCU, TPU & N3 TACH IAW AMM. INSPECTED P4 LINE, NO DISCREPANCIES NOTED. BVCU UNIT PASSED INCOMING TESTS, NO FAULT FOUND. SOLDERED AT PINS 6, 14, R5 & R6 ON PL2 CONNECTOR & PINS 92, 94, R5, R6 & IC1 ON FM1 CIRCUIT BOARD. R & R WORN GROUND STRAP & PEELING PLACARDS. THE STATOR FAILS OHMS TEST & THE BEARINGS WERE DIRTY. STATOR ASSEMBLY REPLACED, UNIT OVERHAULED. FFG UNKNOWN IF REASON FOR RETURN IS DUE TO DISCREPANCY FOUND. FOUND BUFFER PISTON BORE IN CDP, GOV BODY ASSEMBLY & BUFFER PISTON WORN.