NTSB Identification: MIA85IA217.
The docket is stored on NTSB microfiche number 29061.
Nonscheduled 14 CFR
Incident occurred Wednesday, July 24, 1985 in WEST PALM BEACH, FL
Aircraft: CESSNA 402B, registration: N1554G
Injuries: 3 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

AIRCRAFT EXPERIENCED UNSAFE RIGHT MAIN GEAR INDICATION SEVERAL DAYS PRIOR TO THE INCIDENT. MECHANICS FOUND A DAMAGED MICRO SWITCH MOUNTING PLATE WHICH THEY REPAIRED ENOUGH TO HOLD UNTIL A NEW PLATE COULD BE ORDERED AND INSTALLED. ON DAY OF INCIDENT PILOT RECEIVED UNSAFE RIGHT MAIN GEAR INDICATION AND UPON LANDING PLACED A SIDE LOAD ON THE GEAR TO CHECK IT FOR SECURITY. AT THIS TIME A LOUD BANG WAS HEARD FROM THE AREA OF THE RIGHT MAIN GEAR AND THE GEAR BEGAN TO COLLAPSE. A BALKED LANDING WAS PERFORMED AND ON THE SECOND ATTEMPT TO LAND THE RIGHT GEAR AGAIN BEGAN TO COLLAPSE. THE PILOT FLEW THE AIRCRAFT BACK TO HIS DEPARTURE POINT AND ON LANDING THE RIGHT GEAR COLLAPSED. POST CRASH INSPECTION OF THE AIRCRAFT REVEALED THE RIGHT GEAR OVER CENTER BRACE HAD FAILED ALONG WITH ITS MOUNTING BOL.T METALLURGICAL EXAMINATION OF THE FAILED COMPONENTS REVEALED THEY FAILED DUE TO OVERSTRESS WITH NO INDICATIONS OF PREVIOUS CRACKS OR PRESENCE OF CORROSION.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

LANDING GEAR,MAIN GEAR..OVERLOAD

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

DESIGN STRESS LIMITS OF AIRCRAFT..EXCEEDED..PILOT IN COMMAND


Contributing Factors

LANDING GEAR,GEAR INDICATING SYSTEM..FAILURE,PARTIAL

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