Other recommendations to the FAA and Embraer called for action to inform operators that Embraer has not approved use of binder brackets to hold chart binders and that a hazardous condition could result “if a binder becomes dislodged from the bracket.” Settlement in UAS Penalty Case “The NTSB is concerned that, in both of these cases, FOD capable of causing an uncommanded nosewheel turn was not able to be identified during the manufacturers’ acceptance tests,” the board said, recommending revised acceptance test procedures. Tests of the valve found “a foreign gel-like substance” that probably “influenced the movement of the armature such that the EHSV induced an uncommanded left turn.” airports between March 19 and March 29, 2013.
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The board said that tests found FOD in an EHSV from another EMB-145LR - an ExpressJet Airlines airplane that experienced a series of uncommanded swerving events at U.S. The FOD likely was pieces of an O-ring that were left inside the EHSV during manufacturing, the NTSB said. During the accident investigation, the nosewheel steering manifold assembly and the electrohydraulic servo valve (EHSV) were removed from the airplane and examined foreign object debris (FOD) was found inside the EHSV housing “in an area where it could block a hydraulic port, subsequently leading to an uncommanded left nosewheel turn,” the NTSB said. None of the 49 passengers and crewmembers were injured in the landing but the airplane’s nosewheel landing gear was damaged. The NTSB cited the June 7, 2013, landing of a China Eastern Airlines EMB-145LR in Shanghai during which the airplane veered off the left side of the runway and onto a taxiway.
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Federal Aviation Administration (FAA) in late January, the NTSB said the FAA should require operators of EMB-135s, EMB-140s and EMB-145s to incorporate the training into initial and recurrent simulator training. National Transportation Safety Board (NTSB) is calling for new simulator training for uncommanded swerving during landing.
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Uncommanded Swerving © kabantsev | iStockphotoĬiting several runway excursions associated with nosewheel steering problems during the landing of Embraer EMB-145 regional jets, the U.S.