HONOLULU, HI, USA
N56351
PIPER PA-28-140
THE ENG QUIT & THE PLT DITCHED IN THE OCEAN NEAR THE BEACH. THE #4 CONNECTING ROD SHANK WAS FOUND BROKEN AT THE CRANKPIN BEARING HOUSING. ONE ROD BOLT HEAD WAS BROKEN OFF & THE BOLT GRIP WAS NECKED DOWN. THE NUT ON THIS BOLT WAS STILL ON THE BOLT & FLUSH WITH THE THREADED END OF THE BOLT. THE OTHER BOLT & NUT WERE STILL ATTACHED TO THE CRANKPIN BEARING HOUSING HALVES WITH APPROXIMATELY THREE THREADS SHOWING BEYOND THE NUT. THE FOLLOWING TORQUE READINGS WERE NOTED ON THE CONROD BOLTS: #1 ROD UPPER & LOWER BOLTS - 660 INCH POUNDS; #2 ROD UPPER BOLT - 250 INCH POUNDS; #2 ROD LOWER BOLT - 300 INCH POUNDS; #3 ROD UPPER & LOWER BOLTS - 0 INCH POUNDS. REQUIRED TORQUE ON THESE BOLTS IS 480 INCH POUNDS.
Source: NTSB Aviation Accident Database
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