As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) OCT23 AT 1290 HRS M/R OIL CHANGED (500 HR CHANGE. OCT 30 IN CRUISE FLIGHT MAIN ROTOR CHIP LIGHT -M/R CHIP PLUG REMOVED AND CLEANED OCT 31. OCT 31 MADE ANOTHER FLIGHT 1.1 HRS NO CHIP LIGHT. NOV.1 ON START UP CHIP LIGHT ON M/R AGAIN. SHUT-DOWN AND INSPECTED-FOUND NUMEROUS CHIPS AGAIN. M/R TRANSISSION REMOVED AND SENT TO ROBINSON FOR REPAIR OVERHAUL WAS REQUIRED. NO REPORT ON WHAT PART FAILED.