Results
94-20-09: This amendment supersedes an existing airworthiness directive (AD), applicable to certain Pratt & Whitney (PW) JT8D series turbofan engines, that currently requires initial and repetitive inspections of installed third and fourth stage low pressure turbine (LPT) blade sets for blade shroud crossnotch wear, and removal of blade sets found with excessively worn blade shroud crossnotches. This amendment continues to require inspections, and removal, if necessary, of blade sets, but also requires, as a terminating action to the inspections: installation of improved LPT containment hardware, installation of an improved No. 6 bearing scavenge pump bracket bushing, and modification and remarking with a new identification number third and fourth stage LPT vanes with a reduced platform leading edge dimension. This amendment is prompted by reports of additional uncontained engine failures since publication of the current AD, and the availability of improved LPT containment hardware.The actions specified by this AD are intended to prevent damage to the aircraft resulting from engine debris following an LPT blade or shaft failure.
2008-04-14: The FAA is superseding an existing airworthiness directive (AD), which applies to all Dassault Model Falcon 2000, Mystere-Falcon 900, Falcon 900EX, Fan Jet Falcon, Mystere-Falcon 50, Mystere-Falcon 20, Mystere-Falcon 200, and Falcon 10 series airplanes. That AD currently requires repetitive tests and inspections to detect discrepancies of the overwing emergency exit, and corrective action if necessary. This new AD expands the applicability of the existing AD and extends the repetitive test and inspection intervals for all airplanes. This AD results from reports of incorrect operation of the overwing emergency exit due to interference between the emergency exit and the interior accommodation. We are issuing this AD to prevent failure of the overwing emergency exits to open, and consequent injury to passengers or crewmembers during an emergency evacuation.
94-20-10: This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-10-10, -15, -30, and -40 series airplanes and KC-10A (military) airplanes, that requires inspections to detect fatigue-related cracking in certain areas of the horizontal stabilizer; and repair of cracked parts. It also requires installation of terminating modifications, which, when accomplished, would eliminate the repetitive inspections. This amendment is prompted by reports of fatigue-related cracks found on the horizontal stabilizer. The actions specified by this AD are intended to prevent loss of the load carrying and fail safe capability of the horizontal stabilizer, damage to the adjacent structure, and subsequent reduced structural integrity of the airplane, due to the problems associated with fatigue cracking.
2001-14-12: This amendment adopts a new airworthiness directive (AD), applicable to all Boeing Model 737-700IGW series airplanes modified by Supplemental Type Certificate (STC) ST09100AC-D, ST09104AC-D, ST09105AC-D, or ST09106AC-D. This AD requires modifying the passenger entertainment system (PES) installed by those STC's and revising the Airplane Flight Manual. This action is necessary to ensure that the flight crew is able to remove electrical power from the PES when necessary and is advised of appropriate procedures for such action. Inability to remove power from the PES during a non-normal or emergency situation could result in inability to control smoke or fumes in the airplane flight deck or cabin. This action is intended to address the identified unsafe condition.
2020-07-16: The FAA is superseding Airworthiness Directive (AD) 2016-16-09 and AD 2019-03-20, which applied to Dassault Aviation Model FALCON 7X airplanes. Those ADs required revising the existing maintenance or inspection program, as applicable, to incorporate new and more restrictive maintenance requirements and airworthiness limitations for airplane structures and systems. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations; as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. This AD was prompted by the FAA's determination that new or more restrictive airworthiness limitations are necessary. The FAA is issuing this AD to address the unsafe condition on these products.
2004-07-22 R1: The FAA is revising an existing airworthiness directive (AD) that applies to all Boeing Model 747 series airplanes. That AD currently requires that the FAA-approved maintenance inspection program be revised to include inspections that will give no less than the required damage tolerance rating for each structural significant item, and repair of cracked structure. We issued that AD to ensure the continued structural integrity of the entire fleet of Model 747 series airplanes. This new AD clarifies the applicability of the existing AD by specifying which Boeing Model 747 airplanes are affected by this AD because we have determined that certain new variants that have not yet been certified will not be subject to the requirements of this AD. This AD results from a report of incidents involving fatigue cracking in transport category airplanes that are approaching or have exceeded their design service objective. We are issuing this AD to ensure the continued structural integrity ofall Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes.
2017-20-06: We are adopting a new airworthiness directive (AD) for certain Honeywell International Inc. (Honeywell) AS907-1-1A turbofan engines. This AD was prompted by reports of loss of power due to failure of the second stage low-pressure turbine (LPT2) blade. This AD requires a one- time inspection of the LPT2 blades and, if the blades fail the inspection, the replacement of the blades with a part eligible for installation. We are issuing this AD to address the unsafe condition on these products.
2001-14-02: This amendment adopts a new airworthiness directive (AD), applicable to all McDonnell Douglas Model DC-9-51 and DC-9-83 series airplanes modified by Supplemental Type Certificate SA8026NM, that requires deactivation of the in-flight entertainment (IFE) system and removal of the system from the airplane. This action is necessary to prevent the inability of the flight crew to remove power from the IFE system when necessary. Inability to remove power from the IFE system during a non-normal or emergency situation could result in inability to control smoke or fumes in the airplane flight deck or cabin. This action is intended to address the identified unsafe condition.
94-20-05: This amendment adopts a new airworthiness directive (AD) that applies to certain Beech Aircraft Corporation (Beech) 1900 series airplanes. This action requires inspecting the hot battery bus fuse assembly for proper wiring, correcting the wiring if incorrect, and modifying the wiring to add a redundant power source for the hot battery bus. This action results from a report of the hot battery bus bar wrongly installed on the lower (load) side of the hot battery bus fuse assembly on one of the affected airplanes. Correct installation is the upper (power) side of the circuit. The actions specified by this AD are intended to protect from overloads to either circuit connected to the hot battery bus from overloads, which, if not protected, could result in loss of certain emergency equipment.
94-19-04: This amendment adopts a new airworthiness directive (AD), applicable to certain Raytheon Corporate Jets Model BAe 125-1000A series airplanes, that requires modification of the control circuit wiring for the engine thrust reversers and of the wiring for annunciation of rudder bias status. This amendment is prompted by a report that a single dormant electrical fault in the control circuit of the thrust reversers could cause a thrust reverser to deploy if the pilot selects reverse thrust during the approach phase of flight; and by reports that if an asymmetric thrust reverser condition occurs, the correct rudder bias may not be annunciated before the flight crew applies high reverse thrust. The actions specified by this AD are intended to prevent adversely affected controllability of the airplane.