CHICAGO, IL, USA
N715NC
SHORT BROTHERS SD3-60
THE PILOT REPORTED THAT DURING POST LANDING TAXI OPERATIONS, HE WAS UNABLE TO STEER THE AIRPLANE OR APPLY NORMAL BRAKES. THE AIRPLANE DEPARTED THE TAXIWAY, AND RAN ACROSS A GRASS MEDIAN AND SERVICE ROAD BEFORE IT IMPACTED A LIGHT POLE AND CAME TO A STOP. POST ACCIDENT INVESTIGATION REVEALED A FAILED NOSEWHEEL STEERING HYDRAULIC LINE, WHICH ALLOWED SYSTEM FLUID TO BE PORTED OVERBOARD INTO THE NOSE WHEELWELL. FURTHER EXAMINATION REVEALED THE LINE FAILED AS A RESULT OF A PUNCTURE OF THE INTERNAL HOSE BY THE WORN/FRAYED OUTER BRAID. RECORDS INDICATE THE FAILED LINE WAS ORIGINAL EQUIPMENT AND HAD OPERATED THROUGH 17,969 HOURS AND 21,324 CYCLES.
THE FAILURE OF THE NOSE WHEEL STEERING HYDRAULIC LINE DURING AFTER LANDING GROUND OPERATIONS. A RELATED FACTOR IS THE MANUFACTURER'S INADEQUATE INSPECTION AND/OR REPLACEMENT STANDARDS.
Source: NTSB Aviation Accident Database
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