Federal Aviation Administration April 2012 – Federal Register Recent Federal Regulation Documents
Results 51 - 100 of 118
Second Meeting: RTCA Special Committee 227, Standards of Navigation Performance
The FAA is issuing this notice to advise the public of the second meeting of RTCA Special Committee 227, Standards of Navigation Performance.
Amendment of Restricted Area R-2917, De Funiak Springs, FL
This action modifies restricted area R-2917 by reducing the lateral and vertical dimensions of the area. The U.S. Air Force has determined that a smaller restricted area is needed to ensure that aircraft carrying certain electro-explosive devices remain a safe distance from an FPS-85 radar site.
Airworthiness Directives; The Boeing Company Airplanes
We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737-500 series airplanes. This proposed AD was prompted by reports of chem-mill step cracking on the aft lower lobe fuselage skins. This proposed AD would require inspections of the fuselage skin at the chem-mill steps, and repair if necessary. We are proposing this AD to detect and correct cracking on the aft lower lobe fuselage skins, which could result in decompression of the airplane.
Notice of Passenger Facility Charge (PFC) Approvals and Disapprovals
The FAA publishes a monthly notice, as appropriate, of PFC approvals and disapprovals under the provisions of the Aviation Safety and Capacity Expansion Act of 1990 (Title IX of the Omnibus Budget Reconciliation Act of 1990) (Pub. L. 101-508) and Part 158 of the Federal Aviation Regulations (14 CFR Part 158). This notice is published pursuant to paragraph d of Sec. 158.29.
Establishment of Area Navigation (RNAV) Routes; Seattle, WA
This action establishes nine new RNAV routes originating within Seattle Air Route Traffic Control Center's (ARTCC) airspace. The routes extend generally east-west providing connection between the Seattle, WA terminal area and destinations east and southeast of Seattle. This action enhances the navigation routes within the National Airspace System (NAS).
Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures; Miscellaneous Amendments
This rule establishes, amends, suspends, or revokes Standard Instrument Approach Procedures (SIAPs) and associated Takeoff Minimums and Obstacle Departure Procedures for operations at certain airports. These regulatory actions are needed because of the adoption of new or revised criteria, or because of changes occurring in the National Airspace System, such as the commissioning of new navigational facilities, adding new obstacles, or changing air traffic requirements. These changes are designed to provide safe and efficient use of the navigable airspace and to promote safe flight operations under instrument flight rules at the affected airports.
Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures; Miscellaneous Amendments
This rule establishes, amends, suspends, or revokes Standard Instrument Approach Procedures (SIAPs) and associated Takeoff Minimums and Obstacle Departure Procedures for operations at certain airports. These regulatory actions are needed because of the adoption of new or revised criteria, or because of changes occurring in the National Airspace System, such as the commissioning of new navigational facilities, adding new obstacles, or changing air traffic requirements. These changes are designed to provide safe and efficient use of the navigable airspace and to promote safe flight operations under instrument flight rules at the affected airports.
Petition for Exemption; Summary of Petition Received
This notice contains a summary of a petition seeking relief from specified requirements of 14 CFR. The purpose of this notice is to improve the public's awareness of, and participation in, this aspect of FAA's regulatory activities. Neither publication of this notice nor the inclusion or omission of information in the summary is intended to affect the legal status of the petition or its final disposition.
Technical Amendment; Airworthiness Standards-Aircraft Engines
This amendment corrects a number of errors in the airworthiness standards for aircraft engine endurance tests. None of the changes are substantive in nature, and none will impose any additional burden on any person.
Petition for Exemption; Summary of Petition Received
This notice contains a summary of a petition seeking relief from specified requirements of 14 CFR. The purpose of this notice is to improve the public's awareness of, and participation in, this aspect of FAA's regulatory activities. Neither publication of this notice nor the inclusion or omission of information in the summary is intended to affect the legal status of the petition or its final disposition.
Petition for Exemption; Summary of Petition Received
This notice contains a summary of a petition seeking relief from specified requirements of 14 CFR. The purpose of this notice is to improve the public's awareness of, and participation in, this aspect of FAA's regulatory activities. Neither publication of this notice nor the inclusion or omission of information in the summary is intended to affect the legal status of the petition or its final disposition.
Noise Exposure Map Notice; Lafayette Regional Airport, Lafayette, LA
The Federal Aviation Administration (FAA) announces its determination that the noise exposure maps submitted by Lafayette Airport Commission for Lafayette Regional Airport under the provisions of 49 U.S.C. 47501 et seq. (Aviation Safety and Noise Abatement Act) and 14 CFR Part 150 are in compliance with applicable requirements.
Airport Improvement Program (AIP) Grant Assurances
On February 14, 2012, the FAA Modernization and Reform Act of 2012 was signed into law (Pub. L. 112-95). Provisions contained in this law necessitate modifications to five grant assurances.
Removal of Category IIIa, IIIb, and IIIc Definitions; Delay of Effective Date and Reopening of Comment Period
This action delays the effective date and reopens the comment period for a Direct Final Rule that was published on February 16, 2012 (77 FR 9163). In that document, the FAA published amendments to remove the definitions of Category IIIa, IIIb, and IIIc operations because the definitions are outdated and no longer used for aircraft certification or operational authorization. The International Aviation Civil Organization (ICAO) has requested additional time to adequately analyze the Direct Final Rule and prepare comments.
Amendment of Class E Airspace; Columbia, SC, and Establishment of Class E Airspace; Pelion, SC
This action amends Class E Airspace at Columbia, SC, by removing Corporate Airport from the airspace designation, and establishes Class E Airspace at Pelion, SC, using the new airport name, as new Standard Instrument Approach Procedures have been developed at Lexington County Airport at Pelion. This action enhances the safety and airspace management of Instrument Flight Rules (IFR) operations within the National Airspace System. This action also updates the geographic coordinates of the airport.
Airworthiness Directives; Airbus Airplanes
We are adopting a new airworthiness directive (AD) for certain Airbus Model A330-201, -202, -203, -223, -243, -301, -302, -303, -321, -322, -323, -341, -342, and -343 airplanes; and Model A340-200 and -300 series airplanes. This AD requires repetitive inspections of the main fitting and sliding tube of the nose landing gear (NLG) for defects, damage, and cracks, and corrective actions if necessary. This AD was prompted by reports of a cracked main fitting and sliding tube during overhaul of NLGs. We are issuing this AD to detect and correct cracks, defects, or damage of the main fitting and sliding tube of the NLG, which could result in failure of the main fitting or sliding tube, and consequent NLG collapse.
Special Conditions: Boeing, Model 777F; Enhanced Flight Vision System
These special conditions are issued for the Boeing Model 777F airplane. This airplane, as modified by the FedEx Express Corporation, will have a novel or unusual design feature associated with an advanced, enhanced flight vision system (EFVS). The EFVS consists of a head-up display (HUD) system modified to display forward-looking infrared (FLIR) imagery. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.
Airborne Radar Altimeter Equipment (For Air Carrier Aircraft)
This is a confirmation notice of the cancellation of TSO-C67, Airborne Radar Altimeter Equipment (For Air Carrier Aircraft). The effect of the cancelled TSO will result in no new TSO-C67 design or production approvals. However, cancellation will not affect any current production of an existing TSO authorization (TSOA). Articles produced under an existing TSOA can still be installed per the existing airworthiness approvals, and all applications for new airworthiness approvals will still be processed.
Amendment of Class D Airspace; Cocoa Beach, FL
This action amends Class D airspace at Cape Canaveral Skid Strip, Cocoa Beach, FL, by correcting the geographic coordinates of the airport to aid in the navigation of our National Airspace System and by removing the reference of St. Petersburg Automated Flight Service Station from the descriptor. This action enhances the safety and management of Instrument Flight Rules (IFR) operations for standard instrument approach procedures at the airport.
Proposed Revocation of Class D Airspace; Andalusia, AL and Proposed Amendment of Class E Airspace; Fort Rucker, AL
This action proposes to remove Class D Airspace at Andalusia, AL, as the Air Traffic Control Tower at South Alabama Regional Airport at Bill Benton Field has closed, and amend Class E Airspace at Fort Rucker, AL, by recognizing the airport's name change to South Alabama Regional Airport at Bill Benton Field. This action also would update the geographic coordinates of the two listed Class E airports.
Proposed Amendment of Class E Airspace; Tallahassee, FL
This action proposes to amend Class E Airspace in the Tallahassee, FL area. Tallahassee Commercial Airport has been abandoned and controlled airspace is no longer needed. Airspace reconfiguration is necessary for the continued safety and management of instrument flight rules (IFR) operations within the Tallahassee, FL airspace area.
Office of Commercial Space Transportation; Notice of Intent To Prepare an Environmental Impact Statement (EIS), Open a Public Scoping Period, and Conduct a Public Scoping Meeting
This Notice provides information to Federal, State, and local agencies, Native American tribes, and other interested persons regarding the FAA's intent to prepare an EIS for Space Exploration Technologies' (SpaceX's) proposal to launch the Falcon 9 and Falcon Heavy orbital vertical launch vehicles from a private site located in Cameron County, Texas. Under the Proposed Action, SpaceX proposes to construct a vertical launch area and a control center area to support up to 12 commercial launches per year. The vehicles to be launched include the Falcon 9, Falcon Heavy (up to two per year), and a variety of smaller reusable suborbital launch vehicles. SpaceX would be required to apply for the appropriate launch licenses and/or experimental permits to be issued by the FAA. The FAA will prepare the EIS in accordance with the National Environmental Policy Act of 1969 (NEPA; 42 United States Code [U.S.C.] 4321 et seq.), the Council on Environmental Quality Regulations for Implementing the Procedural Provisions of NEPA (40 Code of Federal Regulations [CFR] parts 1500- 1508), and FAA Order 1050.1E, Change 1, Environmental Impacts: Policies and Procedures, as part of its licensing and permitting process.
Proposed Amendment of Class E Airspace; Augusta, GA
This action proposes to amend Class E Airspace in Augusta, GA. The Bushe Non-Directional Beacon (NDB) and the Burke County NDB have been decommissioned and new Standard Instrument Approach Procedures have been developed at Augusta Regional Airport at Bush Field, and Burke County Airport, Waynesboro, GA, respectively. Airspace reconfiguration is necessary for the continued safety and management of instrument flight rules (IFR) operations within the Augusta, GA, airspace area. This action also would update the geographic coordinates of Burke County Airport.
Proposed Establishment of Class E Airspace; Eureka, NV
This action proposes to establish Class E airspace at Eureka, NV. Controlled airspace is necessary to accommodate aircraft using a new Area Navigation (RNAV) Global Positioning System (GPS) standard instrument approach procedures at Eureka Airport, Eureka, NV. The FAA is proposing this action to enhance the safety and management of aircraft operations at the airport.
Proposed Amendment of Class D and E Airspace; Blountville, TN, and Revocation of Class E Airspace; Tri-City, TN
This action proposes to amend Class D and Class E surface airspace at Blountville, TN, and remove Class E airspace at Tri-City, TN, as new Standard Instrument Approach Procedures have been developed at Tri-Cities Regional Airport. This action would enhance the safety and airspace management of Instrument Flight Rules (IFR) operations for SIAPs at the airport. This action would also update the geographic coordinates, airport name, and airspace designation.
Airworthiness Directives; The Boeing Company Airplanes
We are superseding an existing airworthiness directive (AD) for all The Boeing Company 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. That AD currently requires an inspection of the No. 2 and No. 3 windows on the left and right sides of the airplane to determine their part numbers, related investigative and corrective actions if necessary, and repetitive inspections of single pane windows. This new AD requires installing dual pane No. 2 and No. 3 windows. This new AD also removes certain airplanes from the applicability. This AD was prompted by loss of a No. 3 window in flight, which could result in consequent rapid loss of cabin pressure. Loss of the window could also result in crew communication difficulties or incapacitation of the crew. We are issuing this AD to correct the unsafe condition on these products.
Airworthiness Directives; Lockheed Martin Corporation/Lockheed Martin Aeronautics Company Airplanes
We are adopting a new airworthiness directive (AD) for all Lockheed Martin Corporation/Lockheed Martin Aeronautics Company Model 382, 382B, 382E, 382F, and 382G airplanes. This AD was prompted by a report of incidents involving fatigue cracking and corrosion in transport category airplanes that are approaching or have exceeded their design service objective. This AD requires revising the maintenance inspection program to include inspections that will give no less than the required damage tolerance analysis for each principal structural element (PSE), doing repetitive inspections to detect cracks of all PSEs, and repairing cracked structure. We are issuing this AD to maintain the continued structural integrity of the fleet.
Airworthiness Directives; The Boeing Company Airplanes
We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 747 airplanes. This AD was prompted by reports of fractured latch pins found in service; investigation revealed that the cracking and subsequent fracture were initiated by fatigue and propagated by a combination of fatigue and stress corrosion. This AD requires repetitive general visual inspections for broken or missing latch pins of the lower sills of the forward and aft lower lobe cargo doors; repetitive detailed inspections for cracking of the latch pins; and corrective actions if necessary. We are issuing this AD to detect and correct fractured or broken latch pins, which could result in a forward or aft lower lobe cargo door opening and detaching during flight, and consequent rapid decompression of the airplane.
Airworthiness Directives; The Boeing Company Airplanes
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777 airplanes. This AD was prompted by a new revision to the airworthiness limitations of the maintenance planning document. This AD requires revising the maintenance program to update inspection requirements to detect fatigue cracking of principal structural elements (PSEs). We are issuing this AD to ensure that fatigue cracking of various PSEs is detected and corrected; such fatigue cracking could adversely affect the structural integrity of these airplanes.
Airworthiness Directives; Airbus Airplanes
We are superseding an existing airworthiness directive (AD) for certain Airbus Model A310 series airplanes. That AD currently requires, for certain airplanes, modifying the wire routing and installing additional protective sleeves. This new AD adds, for certain airplanes, modifying wire routings and installing a modified bracket. This AD was prompted by analyses of the wire routing showing that the route of the fuel electrical circuit in the right-hand wing must be modified in order to ensure better segregation between fuel quantity indication wires and the 115-volt alternating current wires. We are issuing this AD to prevent short circuits leading to arcing, and possible fuel tank explosion.
Airworthiness Directives; Fokker Services B.V. Airplanes
We are adopting a new airworthiness directive (AD) for certain Fokker Services B.V. Model F.27 Mark 050 airplanes. This proposed AD would require performing a low frequency eddy current inspection for cracks of the lap joint of the rear fuselage, and repair if necessary. This AD was prompted by reports of cracking in the fuselage lap joint. We are issuing this AD to detect and correct exponential crack growth, which could lead to failure of the lap joint over a certain length and consequent in-flight decompression of the airplane.
Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters
We are adopting a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters. This AD was prompted by the discovery of tail rotor blade assemblies (blades) manufactured with mislocated aluminum wire mesh, leaving portions of the graphite torque tube (spar) region unprotected from a lightning strike. The actions are intended to detect mislocated blade wire mesh and to prevent spar delamination, loss of the blade tip cap during a lightning strike, blade imbalance, loss of a blade, and subsequent loss of control of the helicopter.
Airworthiness Directives; Cessna Aircraft Company Airplanes
We are adopting a new airworthiness directive (AD) for certain Cessna Aircraft Company Model 680 airplanes. This AD was prompted by a false cross-feed command to the right-hand fuel control card, due to the cross-feed inputs on the left- and right-hand fuel control cards being connected together and causing an imbalance of fuel between the left and right wing tanks. This AD requires adding diodes to the fuel cross-feed wiring, and revising the airplane flight manual to include procedures to use when the left or right generator is selected OFF. We are issuing this AD to prevent lateral imbalance of the airplane, resulting from uncontrolled fuel cross-feed, which can be corrected by deflecting the aileron trim; deflecting the aileron trim increases the pilot's workload and could exceed the airplane's limitation in a short period of time, resulting in reduced controllability of the airplane.
Airworthiness Directives; DG Flugzeugbau GmbH Sailplanes
We are adopting a new airworthiness directive (AD) for DG Flugzeugbau GmbH Models DG-500 Elan Orion, DG-500 Elan Trainer, DG-500/ 20 Elan, and DG-500/22 Elan sailplanes and Models DG-500M and DG-500MB powered sailplanes. 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 incorrect re-installation of the rear cockpit securing rope for the headrest of the rear seat during maintenance, which could cause the rear seat to interfere with the control stick of the sailplane. We are issuing this AD to require actions to address the unsafe condition on these products.
Policy and Procedures Concerning the Use of Airport Revenue: Petition of the Clark County Department of Aviation to Use a Weight-Based Air Service Incentive Program
On April 14, 2011, the FAA issued a Notice in the Federal Register (76 FR 21,420, April 15, 2011) seeking comment on a petition submitted by Clark County Department of Aviation (CCDOA), owner and operator of Las Vegas McCarran International Airport (Airport). The petition requested a determination by the Federal Aviation Administration (``FAA'') that its proposed air service incentives program (``Incentives Program''), intended to induce increases in landed weight by air carriers at McCarran International Airport (the ``Airport'' or ``LAS'') in Las Vegas, is consistent with Federal law and policies on the use of airport revenue and on airport rates and charges. In its petition, CCDOA proposed the FAA amend its interpretation of ``new air service'' to include ``increases in landed weight.'' The FAA has interpreted these policies, and the underlying Federal statutes, to permit a temporary waiver of standard airport fees for carriers that provide new air service at an airport, as an incentive to begin or expand air service. In September 2010, the agency issued the Air Carrier Incentive Program Guidebook to provide specific guidance to airport operators on the use of air service incentive programs. That guidance restates FAA's previously issued opinions regarding what constitutes new service as characterized in the FAA's Policy and Procedures Concerning the Use of Airport Revenue (Revenue Use Policy) (64 FR 7,696 (Feb. 16, 1999)). Since the inception of the Revenue Use Policy in 1999, the FAA has defined new air service as: (a) Service to an airport destination not currently served, (b) nonstop service where no nonstop service is currently offered, (c) new entrant carrier, and/ or (d) increased frequency of flights to a specific destination. The FAA's interpretation has not permitted an airport operator to offer an incentive program that provides discounts based on increased aircraft weight or an increased number of seats on existing flights. CCDOA proposes an incentive program that would reward air carriers for an increase in landed weight. An increase in landed weight could result from an increase in the size of aircraft used, or ``upgauging,'' on existing flights, consolidation of existing flights, and/or added flights. CCDOA requests that the FAA amend existing guidance to make clear that its proposed incentive plan is consistent with Federal law and existing agency policies on the use of airport revenue and on airport rates and charges. This notice responds to the comments received and grants a portion of the petition as written.
Airworthiness Directives; Rolls-Royce plc Turbofan Engines
The FAA is correcting an airworthiness directive (AD) that published in the Federal Register. That AD applies to RB211-Trent 800 series turbofan engines. The last comment response in the preamble and the first sentence of regulatory text paragraph (g)(1) are incorrect. The repetitive inspection interval should be 2,000 flight cycles, not 1,000 flight cycles. This document corrects those errors. In all other respects, the original document remains the same.
Airworthiness Directives; Lycoming Engines Reciprocating Engines
We are revising an earlier proposed airworthiness directive (AD) for certain Lycoming Engines (L)O-360, (L)IO-360, AEIO-360, O-540, IO-540, AEIO-540, (L)TIO-540, IO-580, and IO-720 series reciprocating engines. That NPRM proposed to require replacing certain crankshafts of affected engine models. This action revises that NPRM by including the IO-390, AEIO-390, and AEIO-580 series engine models having affected crankshafts. We are proposing this supplemental NPRM to prevent failure of the crankshaft, which will result in total engine power loss, in- flight engine failure, and possible loss of the aircraft. Since these actions impose an additional burden over that proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on these proposed changes.
Proposed Amendment of Class E Airspace; Billings, MT
This action proposes to modify Class E airspace at Billings Logan International Airport, Billings, MT, to accommodate aircraft using Area Navigation (RNAV) Global Positioning System (GPS) standard instrument approach procedures at Billings Logan International Airport. This action also would make a minor adjustment to the geographic coordinates of the airport. The FAA is proposing this action to enhance the safety and management of Instrument Flight Rules (IFR) operations at the airport.
Airworthiness Directives; Bombardier, Inc. Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This proposed AD was prompted by reports of jamming/ malfunctioning of the left-hand engine thrust control mechanism. This proposed AD would require modifying the left-hand engine upper core- cowl. We are proposing this AD to prevent jamming/malfunctioning of the left-hand engine thrust control mechanism, which could lead to loss of control of the airplane.
Correction of Authority Citations for Commercial Space Transportation
In 2010, Congress transferred the statute authorizing the FAA's commercial space transportation regulations. This action is necessary to correct affected citations in the Code of Federal Regulations to reflect this transfer of authority. The intended effect of this action is to make the affected regulations comply with the statute.
Seventh Meeting: RTCA Special Committee 225, Rechargeable Lithium Batteries and Battery Systems, Small and Medium Size
The FAA is issuing this notice to advise the public of the seventh meeting of RTCA Special Committee 225, Rechargeable Lithium Batteries and Battery Systems, Small and Medium Size.
29th Meeting: RTCA Special Committee 206, Aeronautical Information and Meteorological Data Link Services
The FAA is issuing this notice to advise the public of the twenty-ninth meeting of RTCA Special Committee 206, Aeronautical Information and Meteorological Data Link Services.
Modification, Revocation and Establishment of Air Traffic Service Routes; Windsor Locks Area; CT
This action modifies four VOR Federal airways, revokes one VOR Federal airway, and establishes three area navigation (RNAV) routes in the vicinity of Windsor Locks, CT. The FAA is taking this action to adjust the airway route structure due to the planned decommissioning of the Bradley VHF omnirange/tactical air navigation (VORTAC) aid located on Bradley International Airport, Windsor Locks, CT. This action also adjusts the termination point of V-203 due to Canadian airspace reconfiguration.
Airworthiness Directives; Rolls-Royce plc Turbofan Engines
We are superseding an existing airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211-Trent 875-17, RB211-Trent 877-17, RB211-Trent 884-17, RB211-Trent 884B-17, RB211-Trent 892-17, RB211- Trent 892B-17, and RB211-Trent 895-17 turbofan engines. That AD currently requires initial and repetitive ultrasonic inspections (UIs) of certain low-pressure (LP) compressor blades identified by serial number (S/N). This AD requires the same actions but expands the population of blades. This AD was prompted by RR concluding that additional blades affected must be inspected. We are issuing this AD to prevent LP compressor blades from failing due to blade root cracks, which could lead to uncontained engine failure and damage to the airplane.
Airworthiness Directives; BAE Systems (Operations) Limited Airplanes
We propose to adopt a new airworthiness directive (AD) for certain BAE SYSTEMS (OPERATIONS) LIMITED Model BAe 146 and Model Avro 146-RJ airplanes. This proposed AD was prompted by reports of cracking and surface anomalies of the fuselage skin at the water trap/air drier unit of the forward discharge valve due to corrosion. This proposed AD would require repetitive detailed inspections for bulging, surface anomalies, and cracking of the fuselage skin adjacent to the discharge valves, repair if necessary, and application of additional sealant in the affected area if necessary. We are proposing this AD to detect and correct bulging, surface anomalies, and cracking that could propagate towards the forward discharge valve outlet and result in the failure of the fuselage skin, leading to a possible sudden loss of cabin pressure.
Airworthiness Directives; Agusta S.p.A. Helicopters
We are adopting a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model AB412 helicopters with certain tail rotor blades (blades) installed. This AD requires, before further flight, removing and replacing each affected blade with an airworthy blade. This AD is prompted by incidents where a blade tip weight separated from a blade in flight on other model helicopters with common part-numbered blades. It has been determined that this unsafe condition may also exist on the specified Agusta model helicopters. The actions specified in this AD are intended to prevent loss of the blade tip weight, loss of a blade, and subsequent loss of control of the helicopter.
Airworthiness Directives; Bombardier, Inc. Model BD-100-1A10 (Challenger 300) Airplanes
We are adopting a new airworthiness directive (AD) for all Bombardier, Inc. Model BD-100-1A10 (Challenger 300) airplanes. This AD was prompted by reports that the horizontal stabilizer trim actuator (HSTA) no-back and the number 1 motor brake assembly (MBA) can both fail dormant. This AD requires revising the airplane maintenance schedule to include new functional tests of the HSTA no-back and HSTA brake system. We are issuing this AD to prevent dormant failure of the HSTA no-back and the number 1 MBA, which along with additional component failure could result in an uncontrollable horizontal stabilizer surface runaway without the ability to retrim, and consequent loss of the airplane.
Airworthiness Directives; Lockheed Martin Corporation/Lockheed Martin Aeronautics Company Airplanes
We are superseding an existing airworthiness directive (AD) for all Lockheed Martin Corporation/Lockheed Martin Aeronautics Company Model L-1011-385-1, L-1011-385-1-14, and L-1011-385-1-15 airplanes. That AD currently requires implementation of a Supplemental Inspection Document (SID) program of structural inspections to detect fatigue cracking, and repair if necessary, to ensure continued airworthiness of these airplanes as they approach the manufacturer's original fatigue design life goal. This new AD adds Model L-1011-385-3 airplanes to the applicability, changes certain inspection thresholds, adds three new structurally significant details (SSDs), and removes an SSD that has been addressed by a different AD. This AD was prompted by an evaluation by the manufacturer of usage and flight data that provided additional information about certain SSDs where fatigue damage is likely to occur. We are issuing this AD to prevent fatigue cracking that could compromise the structural integrity of these airplanes.
Airworthiness Directives; The Boeing Company Airplanes
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, and -900 series airplanes. This AD was prompted by reports of heat damage to the inner wall of the thrust reversers, which could result in separation of adjacent components and consequent structural damage to the airplane, damage to other airplanes, and injury to people on the ground. This AD requires modifying the thrust reverser inner walls, inspecting for damage of the upper and lower inner wall insulation blankets, measuring the electrical conductivity on the aluminum upper compression pads 2 and 3 as applicable, inspecting for discrepancies of the inner wall of the thrust reverser, and corrective actions if necessary. This AD also requires, for certain airplanes, doing various concurrent actions (including replacing the inner wall blanket insulation, installing updated full-authority digital electronic control software, and modifying the thrust reverser inner wall and insulation blankets). We are issuing this AD to correct the unsafe condition on these products.
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