FORT WAYNE, IN, USA
N3337X
CESSNA 310L
THE RIGHT MAIN REMAINED RETRACTED WHEN THE GEAR WERE SELECTED DOWN, AND THE PILOT LANDED ON TWO WHEELS. EXAMINATION OF THE HUNG GEAR SHOWED AN EXTERNAL LOCK RING ON THE STRUT PISTON ASSEMBLY HAD UNSEATED, ALLOWING THE STRUT TO OVEREXTEND AND JAM IN ITS WELL. THE INNER BEARING WHICH MOUNTS NEXT TO THE LOCK RING GROOVE WAS INSTALLED BACKWARDS. THE OPPOSITE LANDING GEAR HAD THE SAME INVERSE INSTALLATION. BOTH INNER BEARINGS WERE NEW PARTS INSTALLED DURING ACCOMPLISHMENT OF AN AIRWORTHINESS DIRECTIVE 5 DAYS BEFORE THE ACCIDENT. THE MANUFACTURER'S SERVICE MANUAL PROVIDES INSTRUCTIONS FOR THE CORRECT ORIENTATION OF THE INNER BEARINGS.
THE IMPROPER INSTALLATION OF A BEARING BY MAINTENANCE PERSONNEL.
Source: NTSB Aviation Accident Database
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