What was found
FAILURE FOUND AT OVERHAUL FOLLOWING CUSTOMER COMPLAINT. DURING A BORESCOPE INSPECTION, FOUND TWO RING GEAR BOLTS SHEARED, AND THE REMAINING BOLTS LOOSE. THE HEADS OF THE BOLSTS WERE VISIBLE AND LAYING ON TOP O FHTE RING GEAR. REMOVED THE INPUT PINION AND BOLT PIECES. THE RECORDED BACKLASH WAS JC = 2.2 MM. DISASSEMBLED THE GEARBOX, COLLECTED THE METAL PARTICLES AND BOLT PIECES. FOUND ALL REMAINING BEVEL WHEEL / VERTICAL SHAFT BOLTS, NUTS, AND LOCKS NOT TORQUED. THE VERTICAL SHAFT, BEVEL WHEEL, AND BEARINGS WERE ALL REJECTED DUE TO CORROSION AND DAMAGE. NDI WAS PERFORMED AND NOT ADDITIONAL DAMAGE FOUND.