Results
94-04-02: This amendment adopts a new airworthiness directive (AD), applicable to certain Canadair Model CL-215-6B11 series airplanes, that requires inspections to detect cracking in the rear engine mount struts, and replacement of struts with new struts, if necessary; and the eventual replacement of all struts with new struts. This amendment is prompted by reports of failures of these rear engine mount struts due to cracking that was caused by rosette welds on the shank of the struts not achieving full weld penetration during manufacture. The actions specified by this AD are intended to prevent failure of the rear engine mount struts, which could subsequently result in reduced structural integrity of the nacelle and engine support structure.
2007-10-08: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: * * *failure of the Autopilot System Computer resulting in the possibility of an out of trim condition, which may lead to loss of aircraft control * * * This AD requires actions that are intended to address the unsafe condition described in the MCAI.
2000-26-13: This amendment adopts a new airworthiness directive (AD) that is applicable to all Dornier Model 328-300 series airplanes. This action requires inspections of all three hydraulic accumulators for signs of leaks, corrective actions if necessary, and eventual installation of an additional locking device to secure the nuts in the hydraulic accumulators, which will terminate the repetitive inspections. This action is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. This action is necessary to prevent possible loss of one or more of the hydraulic accumulators, which could result in a complete loss of the hydraulic system and consequent reduced controllability of the airplane. This action is intended to address the identified unsafe condition.
2018-02-06: We are adopting a new airworthiness directive (AD) for certain Dassault Aviation Model FALCON 7X, FALCON 2000EX, and FALCON 900EX airplanes. This AD requires revising the airplane flight manual (AFM) and minimum equipment list (MEL) to incorporate new limitations. This AD also provides an optional terminating action that removes the AFM and MEL limitations. This AD was prompted by a report indicating that, during approach, an airplane had an unexpected change of barometric settings on both the pilot and co-pilot sides, which also impacted certain display and navigational systems. We are issuing this AD to address the unsafe condition on these products.
96-18-18: This amendment adopts a new airworthiness directive (AD), applicable to all Airbus Model A300-600 series airplanes, that requires inspections to detect cracking of the upper radius of the forward fitting of frame 47, and repair, if necessary. This amendment is prompted by results of full-scale fatigue testing, which revealed cracking in the upper radius of frame 47. The actions specified by this AD are intended to prevent such fatigue cracking, which could result in reduced structural integrity of frame 47 of the fuselage.
2007-10-06: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Two cases of flameout have been reported on Arriel 2B1 engines: One when lowering collective pitch on ground at landing and one when switching from Flight Position to idle Position on ground. Both flameout events are explained as follows: In case of stepper motor loss of steps to a value below the "level 1 failure'' detection threshold, the fuel flow of the anti- flameout limit can be reduced. The reduction can be sufficient to cause an engine flameout when decreasing rapidly the demand for power (it can therefore also happen in-flight). This condition may lead to an uncommanded in-flight shutdown. On a single-engine helicopter, the result may be an emergency autorotation landing or, at worst, an accident. To prevent this, software version 5.02 (TU 144C) increases the anti-flameout limit in the event of small stepper motor loss of steps (below the "level 1 failure'' detection threshold). This AD requires actions that are intended to address the unsafe condition described in the MCAI.
2018-02-03: We are adopting a new airworthiness directive (AD) for all Fokker Services B.V. Model F28 Mark 0070 and Mark 0100 series airplanes. This AD requires contacting the FAA to obtain instructions for addressing the unsafe condition on these products, and doing the actions specified in those instructions. This AD was prompted by an erroneous radio altimeter reading, which caused certain systems to respond in a way that led to loss of speed. We are issuing this AD to address the unsafe condition on these products.
2007-10-02: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: * * * Corrosion on the bearings with propagation to the bracket- hinge of the rudder. This corrosion has been discovered after rudder removals. This condition, if left uncorrected, could result in the loss of the rudder control on the airplane. We are issuing this AD to require actions to correct the unsafe condition on these products.
2018-02-08: We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron (Bell) Model 204B, 205A, and 205A-1 helicopters with a Helicopter Technology Company (HTC) main rotor (M/R) blade installed. This AD requires cleaning and visually inspecting the M/R blades, and depending on the outcome of the inspection, repairing or replacing the M/R blades. This AD is prompted by a report of an M/R blade with a fatigue crack in the grip plate and doublers at the blade retention bolt hole. The actions of this AD are intended to correct an unsafe condition on these products.
98-16-24: This amendment adopts a new airworthiness directive (AD), applicable to all British Aerospace Model BAe 146 and certain Model Avro 146-RJ series airplanes, that requires a one-time inspection for "drill marks" and corrosion on the underside of the wing top skin, and corrective actions, if necessary. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent corrosion from developing on the underside of the top skin of the center wing, which could result in reduced structural integrity of the airplane.