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2021-17-13: The FAA is adopting a new airworthiness directive (AD) for certain PZL Swidnik S.A. Model PZL W-3A helicopters. This AD was prompted by a report of a damaged wheel braking system pneumatic line fitting installed on the left-hand (LH) main landing gear (MLG) leg. This AD requires modifying the LH MLG leg. The FAA is issuing this AD to address the unsafe condition on these products.
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2008-12-17: The FAA is superseding an existing airworthiness directive (AD), which applies to all Lockheed Model L-1011 series airplanes. That AD currently requires an inspection of the fuel level control switch, the fuel level control switch wiring harness, and the wiring harness conduit for damage, wear or chafing, broken or missing O-rings, or indications of electrical arcing. That AD also requires replacement of a certain conduit in the fuel level control switch wiring harness, installation of electrical sleeving over the fuel level control switch wiring harness, and installation of the fuel level control switch that has been so modified. This new AD requires an inspection of the fuel level control switch, wiring harnesses, and harness conduit for any visible damage, wear or chafing, broken or missing O-rings, or indications of electrical arcing; an inspection to determine the part number of the wiring harness conduit; and corrective actions if necessary. This new AD also requires replacing certain sleeving with new, improved sleeving over the wiring harness of the fuel level control switch. This AD results from a design review of the fuel tank systems. We are issuing this AD to prevent chafing of the fuel level control switch wiring harness, which could cause arcing and result in a fire in the fuel tank.
DATES: This AD becomes effective July 23, 2008.
The Director of the Federal Register approved the incorporation by reference of a certain other publication listed in the AD as of July 23, 2008.
On June 1, 2001 (66 FR 21072, April 27, 2001), the Director of the Federal Register approved the incorporation by reference of a certain service bulletin.
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2020-18-13: The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. This AD was prompted by the FAA's analysis of the Model 737 fuel system reviews conducted by the manufacturer. This AD requires modifying the fuel quantity indicating system (FQIS) to prevent development of an ignition source inside the center fuel tank due to electrical fault conditions. This AD also provides alternative actions for cargo airplanes. \n\n((Page 60049)) \n\nThe FAA is issuing this AD to address the unsafe condition on these products.
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95-17-01: This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing Model 707 and 720 series airplanes, that currently requires repetitive visual and dye penetrant inspections to detect cracks in areas of the upper forward skin panels of the wing center section, and repair, if necessary. It also provides an optional terminating modification for the repetitive inspections. This amendment requires repetitive visual and eddy current inspections to detect cracks in areas of the upper forward skin panels of the wing center section, and repair, if necessary. This amendment is prompted by reports indicating that the inspections required by the existing AD are not effective in detecting fatigue cracks in a timely manner. The actions specified by this AD are intended to prevent fatigue cracking and subsequent failure of the upper forward skin panels of the wing center section.
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95-12-20: This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A330 and A340 series airplanes. This action requires a one-time inspection to determine the torque value of all wing slat track stop pins, and correction of discrepancies. This amendment is prompted by a report of a fuel leak that was caused by an incorrectly torqued slat track stop pin that punctured the slat canister. The actions specified in this AD are intended to prevent such fuel leakage conditions, which could result in inadequate fuel for completing a flight and could pose a fire hazard.
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2008-11-11: We are superseding an existing 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:
Cracks have been reported in the front spar center web of the tailplane at the pick-up bracket and at lightening holes. If not detected early and repaired, these cracks may lead to failure of the tailplane.
We are issuing this AD to require actions to correct the unsafe condition on these products.
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2005-06-02: The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 757-200 series airplanes. This AD requires modifying the wiring of the test ground signal for the master dim and test system circuit in the flight compartment. This AD is prompted by a report that the master dim and test system circuit does not have wiring separation of the test ground signal for redundant equipment in the flight compartment. We are issuing this AD to prevent a single fault failure during flight, which could result in test patterns instead of the selected radio frequencies showing on the communications panel. These conditions could adversely affect voice and transponder communication capability between the flightcrew and air traffic control, which could result in increased pilot workload.
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95-16-07: This amendment supersedes an existing airworthiness directive (AD), applicable to Pratt & Whitney JT8D series turbofan engines, that currently requires initial and repetitive inspections of 9th through 12th stage high pressure compressor (HPC) disks at the tierod holes. This amendment eliminates an optional on-wing ultrasonic inspection of the 10th stage high pressure compressor (HPC) disk. This amendment is prompted by a report of an uncontained failure of a 10th stage HPC disk that was previously inspected using the on-wing ultrasonic inspection method. The actions specified by this AD are intended to prevent uncontained fractures of 9th through 12th stage HPC disks and engine failure.
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2008-12-18: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated 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:
During a flight test performed on an EASy aircraft, subsequently to an air data probe failure, the crew realized that the Flight path vectors and the Vertical speeds that were displayed on pilot's and co-pilot's PDU (primary display unit) were identically wrong.
A review of the EASy architecture reveals that * * * One single ADS (air data system) unflagged air data error may lead to the computation and display on both pilot's and co-pilot's display units of unnoticed and misleading flight information.
At take-off or during go-around this situation might considerably reduce flight safety.
We are issuing this AD to require actions to correctthe unsafe condition on these products.
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2001-19-03: This amendment adopts a new airworthiness directive (AD), that is applicable to Rolls-Royce Corporation (formerly Allison Engine Company) Model AE 3007A and AE 3007C turbofan engines with a certain part number high pressure turbine (HPT) 1st to 2nd stage turbine spacer installed. This amendment requires removal and replacement of that HPT 1st to 2nd stage turbine spacer before it reaches its new reduced engine cycle life limit.This amendment is prompted by the results of a detailed component analysis that indicates that the HPT 1st to 2nd stage turbine spacer stresses are higher than predicted. The actions specified by this AD are intended to prevent HPT 1st to 2nd stage turbine spacer failure which could result in an uncontained engine failure and damage to the airplane.
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