Page:CAB Accident Report, Pennsylvania Central Airlines Flight 19.pdf/26



The engines were badly damaged and broken. The entire nose section of the right engine, including the reduction drive gear, cam, propeller shaft, and pinions had been sheared off and were in one group. The forward end of the crankshaft was broken off just in front of the reduction drive gear lock nut. The bolts holding the stationary gear to the front section were sheared off, permitting the stationary gear to revolve. The reduction gear drive splines were damaged when the reduction gear came off. All cylinders were damaged and a number of the heads broken off.

The rear section was broken away from the power case and all parts were badly damaged. The supercharger was broken off adjacent to the cap screws which held it to the main section. The power section of the crank case (steel) was badly distorted. The master rod assembly and the internal portions of the crankshaft, together with the articulating rods, were intact although badly bent. The kelmet material in the master rod bearing was in good condition. However, the lead plating on the master rod bearing shell showed indications of heat. The master rod bearing shell was loose in the rod, but there was no indication of galling. The end seal disc was battered, and a considerable quantity of lead from the master rod bearings had re-deposited itself on the face of the seal disc. The end seal spacer was very badly damaged by the forces resulting from the sudden stoppage of the propeller. Knuckle pins Nos. 2, 5, 6, 7 and 8 were discolored near the oil flats. The crankshaft main bearing journal showed signs of overheating on the inner side of the crank throw. This indication of overheating covered the entire length of the bearing surface over an area approximately 180 degrees