What was found
(CAN)#1 CHIP DETECTOR (L/H SIDE) IN REDUCTION GEARBOX ILLUMINATED. CHIP DETECTOR WAS INSPECTED, AND SMALL AMOUNT OF METAL PARTICLES WERE FOUND. CHIP DETECTOR WAS CLEANED AND RE-INSTALLED INTO GEARBOX ASSEM BLY. THE ENGINE WAS STARTED AND MONITORED, AND ONCE AGAIN, THE LIGHT ILLUMINATED. THE CHIP DETECTOR WAS REMOVED AND LARGE METAL PARTICLES WERE FOUND. THE RGB WAS REMVOED FROM AIRCRAFT, AND IT WAS DISCOVERED AT THIS POINT THAT #5 BEARING WAS CAUSE OF METAL CONTAMINATION. RGB WILL BE REPAIRED AS PER PRATT & WHITNEY OVERHAUL MANUAL. 3017043 R18 (POST SB 5292) BEARING WILL BE INSTALLED.