What was found
METAL PIECE FOUND IN THE IP8 OFFTAKE DUCT CAVITY. AFTER REMOVING THE HP SYSTEM MODULE, A METAL PIECE WAS FOUND IN THE IP8 OFFTAKE DUCT CAVITY. THE LOCATION AND DIMENSION OF THIS METAL PIECE SUGGEST IT COULD BE THE HINGE PIN FROM THE IP NON-RETURN VALVE (NRV) (PART NO. AA1052-00). HOWEVER, IT HAS NOT BEEN CONFIRMED WHETHER THE ENGINE EXPERIENCED AN IP NRV DAMAGE BEFORE. PLEASE REFER TO THE ATTACHED PICTURE FOR MORE DETAILS. DETECTED: AFTER THE REMOVAL OF THE HP SYSTEM, THE IP8 OFFTAKE DUCT CAVITY WAS EXPOSED, MAKING THE PIN VISIBLE AND DETECTABLE.