Results
2007-05-51: This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2007-05-51, which was sent previously to all known U.S. owners and operators of MDHI Model MD600N helicopters by individual letters. This AD requires, before further flight, a visual and eddy current inspection of each lateral mixer output link assembly (mixer link) and replacing any cracked mixer link. This AD also requires performing an eddy current inspection on each mixer link before installing it on any helicopter. This amendment is prompted by the discovery of 3 cracked mixer links. The actions specified by this AD are intended to detect a crack in the mixer link, which could result in failure of the mixer link and subsequent loss of control of the helicopter. \n\nDATES: Effective May 7, 2007, to all persons except those persons to whom it was made immediately effective by Emergency AD 2007-05-51, issued on February 17, 2007, which contained the requirements of this amendment. \n\n\tComments for inclusion in the Rules Docket must be received on or before June 19, 2007.
2019-08-03: We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This AD was prompted by reports that frame web and frame integral inboard chord cracking is occurring on multiple airplanes in multiple locations below the passenger floor. This AD requires repetitive detailed, general visual, and high frequency eddy current (HFEC) inspections of the section 43 lower lobe frames at certain stations; an inspection to determine if certain repairs are installed; and applicable on-condition actions. We are issuing this AD to address the unsafe condition on these products.
2000-26-02: This amendment supersedes an existing airworthiness directive (AD) that applies to Eurocopter Deutschland Model EC135 P1 and T1 helicopters. That AD currently requires visual and dye-penetrant inspections for a cracked stator blade of the fenestron tail rotor (tail rotor). That AD also requires either stop drilling a cracked blade or, as necessary, replacing an unairworthy stator blade with an airworthy stator blade. This amendment requires replacing the existing stator blade assembly with a new stator blade assembly that incorporates a reinforced base and modified riveting and limits the applicability to certain serial numbered tail booms. This amendment is prompted by additional reports of cracked stator blades of the tail rotor. The actions specified by this AD are intended to prevent failure of the tail rotor and subsequent loss of control of the helicopter.
2006-11-05R1: The FAA is revising an existing airworthiness directive (AD) for Rolls-Royce plc (RR) RB211-22B series, RB211-524B, -524C2, -524D4, -524G2, -524G3, and -524H series, and RB211-535C and -535E series turbofan engines with high pressure compressor (HPC) stage 3 disc assemblies, part numbers (P/Ns) LK46210, LK58278, LK67634, LK76036, UL11706, UL15358, UL22577, UL22578, and UL24738 installed. That AD currently requires removing from service certain disc assemblies before they reach their full published life if not modified with anticorrosion protection. This AD requires the same actions but relaxes the removal compliance time for certain disc assemblies that have a record of detailed inspection. This AD results from the FAA allowing certain affected disc assemblies that entered into service before 1990 that have a record of detailed inspections, to remain in service for a longer period than the previous AD allowed. We are issuing this AD to relax the compliance time for certain disc assemblies and track the disc life based on a detailed inspection rather than by its entry into service date, while continuing to prevent corrosion-induced uncontained disc assembly failure, resulting in damage to the airplane. DATES: Effective May 1, 2007. The Director of the Federal Register previously approved the incorporation by reference of certain publications listed in the regulations as of February 24, 2004 (69 FR 2661, January 20, 2004). We must receive any comments on this AD by June 15, 2007.
2018-01-01: We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model MD-11 and MD-11F airplanes. This AD was prompted by fuel system reviews conducted by the manufacturer. This AD requires a one-time inspection of the wire assemblies of the tail fuel tank transfer pumps to determine if metallic transitions are installed at the wire harness breakouts, and corrective actions if necessary. We are issuing this AD to address the unsafe condition on these products.
2018-01-04: We are superseding Airworthiness Directive (AD) 2011-04-05, which applied to all Airbus Model A340-200, -300, -500, and -600 series airplanes. AD 2011-04-05 required revising the maintenance or inspection program to incorporate new airworthiness limitation items (ALIs). This new AD was prompted by the revision of certain ALIs, which specify more restrictive instructions or airworthiness limitations. 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. We are issuing this AD to address the unsafe condition on these products.
2000-26-01: This amendment supersedes an existing airworthiness directive (AD) that applies to Eurocopter Deutschland GMBH (ECD) Model BO-105CB-5 and BO-105CBS-5 helicopters. That AD currently requires, before further flight, creating a component log card or equivalent record and determining the calendar age and number of flights on each tension-torsion (TT) strap. This amendment requires before further flight, establishing a life limit for certain main rotor TT straps. This amendment is prompted by a need to establish a life limit for certain TT straps because of an accident in which a main rotor blade (blade) separated from an ECD Model MBB-BK 117 helicopter due to fatigue failure of a TT strap. The same part-numbered TT strap is used on the ECD Model BO-105 helicopters. The actions specified by this AD are intended to prevent fatigue failure of a TT strap, loss of a blade, and subsequent loss of control of the helicopter.
97-14-02: This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Industrie Model A300-600 series airplanes, that requires repetitive eddy current inspections to detect cracks of the outer skin of the fuselage at certain frames, and repair or reinforcement of the structure at the frames, if necessary. This amendment also requires eventual reinforcement of the structure at certain frames, which, when accomplished, terminates the repetitive inspections. This amendment is prompted by a report indicating that fatigue cracks were found in the area of certain frames. The actions specified by this AD are intended to prevent such fatigue cracking, which could reduce the structural integrity of the airframe and result in rapid decompression of the airplane.
2017-26-07: We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 757-200, -200CB, and -300 series airplanes. This AD was prompted by a report of fatigue cracking found in a certain fuselage frame web. This AD requires inspection of the fuselage frame for existing repairs, repetitive inspections of the frame, and applicable repairs. We are issuing this AD to address the unsafe condition on these products.
2007-08-07: 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 references Latinoamericana de Aviaci[oacute]n S.A. Service Bulletin No. 25/53/03, dated May 10, 2006, which describes the unsafe condition as: REAR AND FORWARD SUPPORTS OF BOTH HORIZONTAL STABILIZER MODIFICATION. It have been found on several of the affected airplanes some severe corrosion and cracks in both supports. The probable cause for those failures is the accumulation of steam or application products vapors. We are issuing this AD to require actions to correct the unsafe condition on these products.