What was found
FOUND EXCESSIVE BLACK METAL COVERING CHIP DETECTOR HEAD, AT NR 2 ENG MAIN OIL TANK (MCD). FOUND GEARBOX (MCD) FULL OF METAL CONTAMINATION. ENGINE REPLACED AT ORD. THE MB-7 AND MB-8 BEARINGS IN THE MAIN GEARBOX WERE FOUND TO HAVE FAILED. PRATT & WHITNEY HAS RECEIVED THIS HARDWARE, AND ARE INVESTIGATING FURTHER. THEIR HYPOTHESIS IS THAT THE MB-8 BEARING IS BACKING OFF THE DRIVESHAFT SHOULDER. THIS CAUSES CROSS LOADING ON THE MB-7 BEARING, WHICH SUBSEQUENTLY FAILS.