MILWAUKEE, WI, USA
N163MA
SWEARINGEN SA226TC
A GEAR UP LANDING WAS PERFORMED AFTER THE CREW WAS UNABLE TO EXTEND THE RGT MAIN GEAR THRU NORMAL & EMERG PROCEDURES. AN EXAM OF THE ACFT DISCLOSED THE RGT MAIN GEAR DOOR AFT HINGE BOLT WAS SLIGHTLY BENT & DIFFICULT TO ROTATE IN ITS BUSHING. THE BUSHING & BOLT WERE DRY & HAD NOT BEEN LUBRICATED RECENTLY. THE HYDRAULIC CYLINDER WAS NOT CAPABLE OF SUPPLYING ENOUGH PRESSURE TO OVERCOME THE BINDING DOOR. THE BUSHING HAD NOT RECENTLY BEEN INSPECTED OR LUBRICATED BY MAINTENANCE PERSONNEL BECAUSE OF ITS LOCATION BEING DIFFICULT TO ACCESS.
Source: NTSB Aviation Accident Database
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