NTSB Identification: ATL82IA034
Scheduled 14 CFR Part 135: Air Taxi & Commuter
Incident occurred Tuesday, January 12, 1982 in CLARKSBURG, WV
Probable Cause Approval Date: 01/12/1983
Aircraft: EMBRAER EMB-110P1, registration: N615KC
Injuries: 2 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.

DURING TAXI OUT FROM GREENSBORO, NC, THE CAPTAIN NOTED THAT THE AIRCRAFT WAS PULLING TO THE RIGHT. THE PROBLEM ALLEVIATED ITSELF WHEN THE PILOT TAPPED THE RIGHT BRAKE. AFTER A NORMAL TAKEOFF, THE COPILOT NOTICED DURING GEAR RETRACTION THAT THE RIGHT MAIN WHEEL APPEARED TO BE CANTED OUT OF POSITION. AFTER THE GEAR RETRACTION CYCLE, THE GEAR IN-TRANSIT LIGHT REMAINED ILLUMINATED AND THE CREW DECIDED TO DIVERT TO THE OPERATORS BASE AT CLARKSBURG, WV. AFTER BURNING OFF FUEL, THE GEAR WAS LOWERED FOR LANDING AND IT WAS NOTED THAT THE RIGHT MAIN WHEEL WAS ROTATED 90 DEGREES TO ITS NORMAL POSITION. THE ENSUING PRECAUTIONARY LANDING WAS NORMAL WITH NO DAMAGE OR INJURY. INVESTIGATION REVEALED THAT THE RIGHT GEAR TORQUE LINK ASSEMBLY HAD BROKEN DUE TO STRIPPED THREADS ON SEVERAL OF THE ATTACHING BOLTS. THE STRIPPED THREADS ALLOWED A SIDE LOAD TO SHEAR THE LOCKING PLATE DURING NORMAL GROUND OPERATIONS. A REVIEW OF THE MAINTENANCE MANUAL REVEALED SPECIFIC TORQUE VALUES WERE NOT LISTED, THUS ALLOWING THE BOLTS TO BE UNDER TORQUED.

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

LANDING GEAR,NORMAL RETRACTION/EXTENSION ASSEMBLY..UNDERTORQUED

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

CONDITION(S)/STEP(S) INSUFFICIENTLY DEFINED..MANUFACTURER

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

LANDING GEAR,NORMAL RETRACTION/EXTENSION ASSEMBLY..CROSS/STRIPPED THREADED


Contributing Factors

MAINTENANCE,ADJUSTMENT..NOT UNDERSTOOD..COMPANY MAINTENANCE PERSONNEL

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