Results
2018-17-05: We are adopting a new airworthiness directive (AD) for all Airbus SAS Model A350-941 and -1041 airplanes. This AD was prompted by reports that electro-hydrostatic actuators (EHAs), installed on the inboard ailerons, elevators, and rudder, had degraded insulation resistance in the direct drive solenoid valve (DDSOV), due to incorrect sealing application. This AD requires a check of the insulation resistance of the DDSOV of each affected EHA and applicable corrective actions. We are issuing this AD to address the unsafe condition on these products.
94-18-08: This amendment supersedes an existing airworthiness directive (AD), applicable to McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM series helicopters, that requires daily preflight checks and 100 hours time-in-service (TIS) inspections for tail rotor blade abrasion strip (abrasion strip) debonding until abrasion strip rivets (rivets) are installed. This amendment also supersedes a Priority Letter AD that currently requires installation of rivets, corrects tail rotor blade part numbers listed in the previous AD, and retains the daily preflight checks of the previous AD until rivets are installed to secure the abrasion strip. This AD provides a terminating action for the abrasion strip debonding and also seeks to clear up any confusion among operators caused by having a published AD and a Priority Letter that are applicable to the same helicopter part. This AD replaces both of those documents. Thisamendment is prompted by an accident resulting from the separation of an abrasion strip from a tail rotor blade and subsequent tail rotor separation. The actions specified by this AD are intended to prevent loss of the abrasion strip, separation of the tail rotor, and subsequent loss of control of the helicopter.
2008-03-16: We are adopting a new airworthiness directive (AD) for certain Cirrus Design Corporation (CDC) Models SR20 and SR22 airplanes. This AD requires you to inspect the rudder, aileron, and rudder-aileron interconnect rigging; correct any out-of-rig condition; replace the attaching hardware for the rudder-aileron interconnect arm; and report any out-of-rig condition found. This AD results from a jamming of the aileron and rudder controls on a Model SR20 airplane, which resulted in loss of rudder and aileron flight controls. We are issuing this AD to prevent the possibility of jamming of the rudder-aileron interconnect system, which may result in loss of rudder and aileron flight controls.
2001-13-19: This amendment adopts a new airworthiness directive (AD), applicable to all Bombardier Model DHC-8-102, -103, -106, -201, -202, -301, -311, -314, and -315 series airplanes, that requires revising the Bombardier maintenance program to incorporate repetitive inspections to detect fatigue cracking in certain structures; and corrective actions, if necessary. This amendment is prompted by issuance of mandatory continuing airworthiness information issued by a foreign airworthiness authority. The actions specified by this AD are intended to ensure that fatigue cracking of certain principal structural elements is detected and corrected; such fatigue cracking could adversely affect the structural integrity of these airplanes.
2001-13-24: This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A310 series airplanes and Model A300 B4-600, B4-600R, and F4-600R (collectively called A300-600) series airplanes, that requires revising the Airplane Flight Manual to prohibit the airplane from being moved during inertial reference unit alignment. The actions specified by this AD are intended to prevent a loss of positioning data and a display of incorrect attitude data to the flight crew, which could result in severe consequences to the airworthiness of the airplane if operated under flight conditions with no visual reference. This action is intended to address the identified unsafe condition.
81-19-08: 81-19-08 GENERAL ELECTRIC: Amendment 39-4219. Applies to all General Electric Model CF6-6 series turbofan engines installed in McDonnell Douglas DC10-10 aircraft containing low pressure turbine rotor stage 2 disks, P/Ns 9690M77P03, 9690M77P04, 9690M77P09, 9690M77P11, and 9690M77P13. Compliance required as indicated. To prevent possible low cycle fatigue failure of these disks, the life limits have been reduced below the figures currently approved. Remove from service low pressure turbine rotor stage 2 disks prior to reaching the revised life limits listed below or within the next 25 cycles in service after the effective date of this AD, whichever comes later. Disk Part Number Previous Life Limit/Cycles Revised Life Limit/Cycles 9690M77P03 27,000 11,500 9690M77P04 27,000 11,500 9690M77P09 27,000 11,500 9690M77P11 27,000 11,500 Serial Numbers MP0A0727 through MP0A2215 9690M77P11 27,000 9,300 All other serial numbered disks9690M77P13 27,000 10,000 NOTE: General Electric CF6-6 Service Bulletin 72-786 pertains to this subject. This amendment becomes effective on September 21, 1981.
2018-17-03: We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 787-8 and 787-9 airplanes. This AD was prompted by reports of failures of the lip heater assemblies of the inlet ice protection system of the cabin air compressor (CAC) due to chafing. This AD requires changing the airplane electrical connectors and the routes of certain wire bundles, and installing new or modified left and right CAC inlet duct assemblies. We are issuing this AD to address the unsafe condition on these products.
2008-03-10: We are adopting a new airworthiness directive (AD) for certain Cessna Aircraft Company (Cessna) Models 525, 525A, and 525B airplanes. This AD requires you to inspect the lower wing skin structure, forward wing spar, lower fuselage skin, fairings, and the external fairing frames for corrosion; repair any damage found; apply a corrosion inhibitive sealant to the fuselage fairings before reinstalling; and disable the cockpit mounted pilot relief tube. This AD results from leaking of the cockpit mounted pilot relief tube, which caused corrosion of the airplane structure. We are issuing this AD to detect and correct any damage from corrosion of the airplane structure. Corrosion of the airplane structure could cause structural degradation and lead to structural failure of the airplane with consequent loss of control.
2020-19-04: The FAA is adopting a new airworthiness directive (AD) for Leonardo S.p.a. (Leonardo) Model AB139 and AW139 helicopters. This AD requires removing certain main gearbox (MGB) input modules from service. This AD was prompted by the discovery that a batch of duplex bearings, which are installed on the MGB input modules, are defective. The actions of this AD are intended to address an unsafe condition on these products.
94-17-17: This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747 series airplanes, that requires inspections of the inboard and outboard strut chords, stiffeners, and web to detect cracks and loose fasteners; repair of the chords, stiffeners, or web, if necessary; and replacement of any loose fastener. This amendment is prompted by reports of fatigue cracks and loose fasteners found in the forward lower spar web of the inboard strut on Model 747 series airplanes equipped with Pratt & Whitney JT9D-3 and JT9D-7 series engines. The actions specified by this AD are intended to prevent separation of the strut from the wing of the airplane due to fatigue cracking.