Department of Transportation April 2012 – Federal Register Recent Federal Regulation Documents
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Transportation of Household Goods in Interstate Commerce; Consumer Protection Regulations: Released Rates of Motor Carriers of Household Goods
FMCSA harmonizes its regulations with a recent Surface Transportation Board (STB) order that requires certain information about household goods motor carrier liability to appear on the estimates and bills of lading that carriers must provide to individual shippers.
Over-the-Road Bus Accessibility Program Grants
The U.S. Department of Transportation's (DOT) Federal Transit Administration (FTA) announces the availability of funds in Fiscal Year (FY) 2012 for the Over-the-Road Bus Accessibility (OTRB) Program, initially authorized by Section 3038 of the Transportation Equity Act for the 21st Century (TEA-21). The OTRB program makes funds available to private operators of over-the-road buses to finance the incremental capital and training costs of complying with DOT's over-the-road bus accessibility regulation. The authorizing legislation calls for national solicitation of proposals, with grantees to be selected on a competitive basis. Program funds are available to intercity fixed-route providers and other OTRB providers at up to 90 percent of the project cost. The Surface and Air Transportation Programs Extension Act of 2011, Public Law 112-30, continues the authorization of the Federal transit programs of the U.S. Department of Transportation (DOT) through March 31, 2012, and provides contract authority for this program equal to approximately one half of the amounts available in FY 2011. Approximately $8.8 million is expected to be available for the OTRB program discretionary allocation and may include other discretionary program funds that become available. The total amount of funding available will be contingent on Congressional authorization and appropriation prior to the selection of awardees, and based on the timing of such funding becoming available, may also include funding appropriated for Fiscal Year 2013.
Sixth Meeting: RTCA, NextGen Advisory Committee
The FAA is issuing this notice to advise the public of the sixth meeting of RTCA, NextGen Advisory Committee.
Thirteenth Meeting: RTCA Special Committee 224, Airport Security Access Control Systems.
The FAA is issuing this notice to advise the public of the thirteenth meeting of RTCA Special Committee 224, Airport Security Access Control Systems
Requirements and Registration for the U.S. DOT Motorcoach Safety Data Utilization Student Challenge
FMCSA announces the U.S. DOT Motorcoach Safety Data Utilization Student Challenge. The purpose of the Challenge is to facilitate the development of mobile Web sites and applications to make FMCSA's motorcoach safety data more accessible and user-friendly. The Challenge is open to students currently enrolled at a fully-accredited higher education institution, or who plan to enroll in the fall of 2012 or the winter of 2013. The eligibility requirements and rules can be found below.
Petition for Exemption From the Federal Motor Vehicle Motor Theft Prevention Standard; General Motors Corporation
This document grants in full the petition of General Motors Corporation (GM) for an exemption of the Buick Verano vehicle line in accordance with 49 CFR part 543, Exemption from the Theft Prevention Standard. This petition is granted, because the agency has determined that the antitheft device to be placed on the line as standard equipment is likely to be as effective in reducing and deterring motor vehicle theft as compliance with the parts-marking requirements of the Theft Prevention Standard (49 CFR part 541).
Agency Requests for Approval of a New Information Collection(s): Human Subjects Experiments Related to Keyless Ignition Controls, Gear Selection Controls, and Audible Warnings
The Department of Transportation (DOT) invites public comments about our intention to request Office of Management and Budget (OMB) approval for a new information collection. The collection involves recruitment of participants, balancing the subject sample and debriefing questionnaires. The information to be collected will be used to balance the participants between younger and older age groups, genders and previous driving experience with keyless ignition, or lack thereof. These observational experiments are being conducted in support of current agency regulatory efforts that contemplate revising Federal Motor Vehicle Safety Standard No. 114 (Docket No. NHTSA-2011-0174 RIN 2127-AK88). We are required to publish this notice in the Federal Register by the Paperwork Reduction Act of 1995, Public Law 104-13.
Semi-Annual Workforce Management Conference
The Department of Transportation, Office of the Secretary, announces the second Semi-Annual Workforce Management Conference. The Conference will be hosted by the Secretary of Transportation, Ray LaHood. It will be held in Washington, DC. This conference was recommended by the former Future of Aviation Advisory Committee (FAAC).
Reporting of Ancillary Airline Passenger Revenues
This document announces a public meeting on a Notice of Proposed Rulemaking (NPRM) issued on July 15, 2011. The NPRM proposed changes regarding reporting of airline ancillary passenger revenues, computation of mishandled baggage rates, and collection of separate statistics for mishandled wheelchairs and scooters used by passengers with disabilities. During the public meeting, DOT staff will provide a summary of the proposals in the NPRM and seek input on costs and benefits associated with the implementation of the proposals.
Proposed Recommendations on Obstructive Sleep Apnea
FMCSA is withdrawing its proposed regulatory guidance for obstructive sleep apnea (OSA) and request for comment as published on April 20, 2012. The Agency is still in the process of carefully reviewing the recommendations submitted by the Motor Carrier Safety Advisory Committee and Medical Review Board. The initial publication was a clerical error. We anticipate requesting public comment on the recommendations later this year.
Qualification of Drivers; Exemption Applications; Diabetes Mellitus
FMCSA announces its decision to exempt seventeen individuals from its rule prohibiting persons with insulin-treated diabetes mellitus (ITDM) from operating commercial motor vehicles (CMVs) in interstate commerce. The exemptions will enable these individuals to operate CMVs in interstate commerce.
Airworthiness Directives; The Boeing Company Airplanes
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 767 airplanes. This AD was prompted by reports of cracking in the upper wing skin at the fastener holes common to the pitch load fittings of the inboard and outboard front spar, which could result in the loss of the strut-to-wing upper link load path and possible separation of a strut and engine from the airplane during flight. This AD requires repetitive inspections to detect fatigue cracking in the wing skin, and corrective actions if necessary. We are issuing this AD to correct the unsafe condition on these products.
Hazardous Materials; Miscellaneous Amendments (RRR)
PHMSA proposes to make miscellaneous amendments to the Hazardous Materials Regulations to update and clarify certain regulatory requirements. These proposed amendments are designed to promote safer transportation practices; eliminate unnecessary regulatory requirements; address a petition for rulemaking; incorporate a special permit into the Hazardous Materials Regulations; facilitate international commerce; and simplify the regulations. Among other provisions, PHMSA is proposing to update various entries in the Hazardous Materials Table and corresponding special provisions, clarify the lab pack requirements for temperature-controlled materials, and revise the training requirements to require that a hazardous material employer must make hazardous materials employee training records available upon request to an authorized official of the Department of Transportation (DOT) or the Department of Homeland Security (DHS).
Requested Administrative Waiver of the Coastwise Trade Laws: Vessel MARIE ELENA; Invitation for Public Comments
As authorized by 46 U.S.C. 12121, the Secretary of Transportation, as represented by the Maritime Administration (MARAD), is authorized to grant waivers of the U.S.-build requirement of the coastwise laws under certain circumstances. A request for such a waiver has been received by MARAD. The vessel, and a brief description of the proposed service, is listed below.
Notice of Intent To Rule on Request To Release Airport Property at the South Texas Regional Airport at Hondo (formerly Hondo Municipal Airport), Hondo, TX
The FAA proposes to rule and invite public comment on the release of land at the South Texas Regional Airport at Hondo under the provisions of Section 125 of the Wendell H. Ford Aviation Investment Reform Act for the 21st Century (AIR 21).
Airworthiness Directives; The Boeing Company Airplanes
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes equipped with analog transient suppression devices (ATSDs) installed in accordance with Supplemental Type Certificate ST00146BO. This AD was prompted by multiple reports of corrosion on ATSDs. This AD requires revising the maintenance program to incorporate certain limitations. We are issuing this AD to detect and correct corrosion on ATSDs, which could result in the loss of high voltage transient protection (e.g., lightning protection) in the fuel tanks and consequent fuel tank explosion and loss of the airplane.
Airworthiness Directives; Airbus Airplanes
We are adopting a new airworthiness directive (AD) for all Airbus Model A310 series airplanes. This AD was prompted by a report of an electrical arc and hydraulic haze in the wheel bay of the left-hand main landing gear (MLG) possibly resulting from chafing between the hydraulic high pressure hose and electrical wiring of the green electrical motor pump (EMP). This AD requires temporarily prohibiting in-flight use of the green EMPs; temporarily revising the airplane flight manual (AFM) limitations section; temporarily installing a placard in the cockpit overhead panel; doing a one-time general visual inspection for correct condition and installation of hydraulic pressure hoses, electrical conduits, feeder cables, and associated clamping devices; and corrective action if necessary. We are issuing this AD to detect and correct chafing of hydraulic pressure hoses and electrical wiring of the green EMPs, which in combination with a system failure, could cause an uncontrolled and undetected fire in the MLG bay.
Amendment to Agency Rules of Practice
The Federal Motor Carrier Safety Administration (FMCSA) amends its Rules of Practice for Motor Carrier, Intermodal Equipment Provider, Broker, Freight Forwarder, and Hazardous Materials proceedings. The Agency clarifies that paying the full proposed civil penalty in an enforcement proceeding, either in response to a Notice of Claim (NOC) or later in the proceeding, does not allow respondents to unilaterally avoid an admission of liability for the violations charged. Additionally, the Agency establishes procedures for issuing out-of- service orders to motor carriers, intermodal equipment providers, brokers, and freight forwarders it determines are reincarnations of other entities with a history of failing to comply with statutory or regulatory requirements; these procedures will provide for an administrative review before the out-of-service order takes effect. Finally, the Agency establishes a process for consolidating Agency records of reincarnated companies with their predecessor entities.
Airworthiness Directives; Airbus Airplanes
We are adopting a new airworthiness directive (AD) for all Model A330-200 and -300 series airplanes; Model A330-223F and -243F airplanes; and Model A340-200, -300, -500, and -600 series airplanes. This AD was prompted by a report that during the evaluation of engine failures at take-off on Airbus flight simulators, it has been shown that with flight control primary computer (FCPC) 1 inoperative, in worst case scenario when FCPC2 and FCPC3 resets occur during rotation at take off, a transient loss of elevator control associated with a temporary incorrect flight control law reconfiguration could occur. This AD requires revising the Limitations section of the applicable airplane flight manual. We are issuing this AD to prevent movement of the elevators to zero position, which could result in inducing a pitch down movement instead of a pitch up movement needed for lift off, resulting in loss of controllability of the airplane.
Notice To Rescind Notice of Intent To Prepare an Environmental Impact Statement; Mahoning and Trumbull Counties, OH
The FHWA is issuing this notice to advise the public that we are rescinding the NOI published on November 5, 2004 to prepare an EIS for improvements that were proposed to the transportation system on US 62 in the cities of Youngstown and Hubbard in Mahoning and Trumbull Counties, Ohio.
Aviation Rulemaking Advisory Committee Meeting on Transport Airplane and Engine Issues
This notice announces a public meeting of the FAA's Aviation Rulemaking Advisory Committee (ARAC) to discuss transport airplane and engine (TAE) issues.
Visual-Manual NHTSA Driver Distraction Guidelines for In-Vehicle Electronic Devices
On February 24, 2012, NHTSA published proposed voluntary NHTSA Driver Distraction Guidelines for in-vehicle electronic devices. The agency provided a 60-day comment period. We received a petition from the Alliance of Automobile Manufacturers requesting an extension of the comment period. The petitioner argued that additional time was needed to review information that was not placed in the docket when the proposed NHTSA Guidelines were published. After considering the petition, we are extending the comment period by 24 days, from April 24, 2012, to May 18, 2012.
Safety Advisory 2012-02; Restricted Speed
FRA is issuing Safety Advisory 2012-02 to remind railroads and their employees of the importance of compliance with relevant railroad operating rules when trains and locomotives are to be operated at restricted speed. This safety advisory contains a preliminary discussion of recent train accidents involving a failure to operate at restricted speed and makes recommendations to railroads to ensure employee compliance with the requirements of restricted speed operating rules.
Mitsubishi Motors North America, Inc., Grant of Petition for Decision of Inconsequential Noncompliance
Mitsubishi Motors North America, Inc. (Mitsubishi) \1\ has determined that an unknown number of replacement seat belts that it imported do not include the installation, usage and maintenance instructions required by paragraphs S4.1(k) and S4.1(l) of Federal Motor Vehicle Safety Standard (FMVSS) No. 209, Seat Belt Assemblies. Mitsubishi filed an appropriate report dated October 25, 2010, pursuant to 49 CFR Part 573 Defect and Noncompliance Responsibility and Reports.
Airworthiness Directives; The Boeing Company Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Boeing Company Model 757 airplanes. This proposed AD was prompted by a report of in-flight fracture of the right windshield (window 1) on the flight deck and multiple reports of electrical arcs at the terminal blocks of the flight deck windshields resulting in smoke and fire. This proposed AD would require repetitive inspections of electrical heat terminals on the left and right windshields for damage, and corrective actions if necessary. This proposed AD would also allow for replacing an affected windshield with a windshield equipped with different electrical connections, which would terminate the repetitive inspections for that windshield. We are proposing this AD to prevent smoke and fire in the flight deck, which can lead to loss of visibility, and injuries to or incapacitation of the flight crew.
Buy America Waiver Notification
This notice provides information regarding the FHWA's finding that a Buy America waiver is appropriate for the use of non-domestic 45' and 55' Pre-stressed Spun Concrete Transmission and Distribution Power Poles in the Territory of Guam for synchronization of the existing system.
Airworthiness Directives; Turbomeca S.A. Turboshaft Engines
We are adopting a new airworthiness directive (AD) for all Turbomeca S.A. Arriel 2B and 2B1 turboshaft engines. This AD was prompted by the discovery of non-conformities of certain power turbine (PT) blade fir-tree roots. This AD requires removing the affected PT blades from service on or before reaching a new reduced life limit for those certain PT blades. We are issuing this AD to prevent PT blade rupture, which could result in an uncommanded in-flight engine shutdown, forced autorotation landing, or accident.
Requested Administrative Waiver of the Coastwise Trade Laws: Vessel STEPPIN UP; Invitation for Public Comments
As authorized by 46 U.S.C. 12121, the Secretary of Transportation, as represented by the Maritime Administration (MARAD), is authorized to grant waivers of the U.S.-build requirement of the coastwise laws under certain circumstances. A request for such a waiver has been received by MARAD. The vessel, and a brief description of the proposed service, is listed below.
Requested Administrative Waiver of the Coastwise Trade Laws: Vessel JOJO MARIA; Invitation for Public Comments
As authorized by 46 U.S.C. 12121, the Secretary of Transportation, as represented by the Maritime Administration (MARAD), is authorized to grant waivers of the U.S.-build requirement of the coastwise laws under certain circumstances. A request for such a waiver has been received by MARAD. The vessel, and a brief description of the proposed service, is listed below.
Marine Transportation System National Advisory Council
The Maritime Administration announces that the Marine Transportation System National Advisory Council (MTSNAC) will hold a meeting to discuss recommendations to the Secretary on the integration of marine highways into the national transportation system and the development of a steady and reliable funding mechanism for port infrastructure development. A public comment period will commence at 1:30 p.m. on May 8, 2012. To provide time for as many people to speak as possible, speaking time for each individual will be limited to three minutes. Members of the public who would like to speak are asked to contact Richard J. Lolich by May 1, 2012. Commenters will be placed on the agenda in the order in which notifications are received. If time allows, additional comments will be permitted. Copies of oral comments must be submitted in writing at the meeting. Additional written comments are welcome and must be filed by May 11, 2012.
Airworthiness Directives; Empresa Brasileria de Aeronáutica S.A. (EMBRAER) Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Empresa Brasileria de Aeron[aacute]utica S.A. (EMBRAER) Model EMB-505 airplanes. This proposed 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 an inadequate amount of drain holes in the primary control surfaces (rudder, elevator, and aileron) and their tab surfaces may allow water to accumulate in the control surfaces. This condition could cause unbalanced flight control surfaces and reduced flutter margins, which could result in loss of control of the airplane. We are issuing this proposed AD to require actions to address the unsafe condition on these products.
Airworthiness Directives; Sicma Aero Seat Passenger Seat Assemblies, Installed on, But Not Limited to, ATR-GIE Avions de Transport Régional Airplanes
We are superseding an existing airworthiness directive (AD) for certain Sicma Aero Seat Model 9401, 9402, 9404, 9505, 9406, 9407, 9408, and 9409 series passenger seat assemblies, installed on, but not limited to, ATRGIE Avions de Transport R[eacute]gional Model ATR42 and ATR72 airplanes. That AD currently requires repetitive detailed inspections for cracking of the central and lateral spreaders of the affected seats, and repair or replacement of the spreader if necessary. This AD was prompted by a determination that the existing AD included Model 9505 series passenger seat assemblies in the applicability instead of Model 9405 series passenger seat assemblies. We are issuing this AD to detect and correct cracking of the central and lateral spreaders, which could lead to further cracking of the seat spreaders, causing injury to passengers or crew members during heavy turbulence in flight or in the event of an emergency landing.
National Highway Traffic Safety Administration Electric Vehicle Safety Technical Symposium
The National Highway Traffic Safety Administration (NHTSA) is announcing a technical symposium that will be held in Washington, DC on May 18, 2012 to discuss safety considerations for electric vehicles powered by lithium-ion (Li-ion) batteries. The symposium will include brief NHTSA presentations outlining current agency research and activities related to Li-ion batteries and Li-ion battery-powered vehicles, as well as presentations by the Department of Energy, voluntary standards bodies, and automotive and battery manufacturers. Information on the date, time, location, and framework for this public event is included in this notice. Because of space limitations, registration by May 11, 2012 is highly recommended. There are no fees to register or to attend this event.
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.
Waiver of Acceptable Risk Restriction for Launch and Reentry
This notice concerns two petitions for waiver submitted to the FAA by Space Exploration Technologies Corp. (SpaceX): a petition to waive the restriction that the risk to the public from the launch of an expendable launch vehicle not exceed an expected average number of 0.00003 casualties (Ec
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.
Inflation Adjustment of the Aggravated Maximum Civil Monetary Penalty for a Violation of a Federal Railroad Safety Law or Federal Railroad Administration Safety Regulation or Order
To comply with the Federal Civil Penalties Inflation Adjustment Act of 1990, FRA is adjusting the aggravated maximum penalty that it will apply when assessing a civil penalty for a violation of a railroad safety statute, regulation, or order under its authority. In particular, FRA is increasing the aggravated maximum civil penalty (i.e., the maximum civil penalty per violation where a grossly negligent violation or a pattern of repeated violations has created an imminent hazard of death or injury or has caused death or injury) from $100,000 to $105,000. The current minimum civil penalty per violation of $650 and the current ordinary maximum civil penalty per violation of $25,000 remain the same.
Airworthiness Directives; Bombardier, Inc. Airplanes
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes. This AD was prompted by multiple reports of short circuit events during pre- delivery inspections and test flights, one of which resulted in smoke in the cockpit. This AD requires replacing or relocating of certain circuit breaker panel (CBP) bus bars on certain airplanes, inspecting for any loose or improperly crimped lugs in certain electrical panel locations and replacement if necessary, and inspection for foreign object damage in certain areas and removal if necessary. We are issuing this AD to prevent arcing, damage to adjacent structure, smoke in the cockpit, or loss of system redundancies.
Airworthiness Directives; Learjet Inc. Airplanes
We are adopting a new airworthiness directive (AD) for certain Learjet Inc. Model 60 airplanes. This AD was prompted by two incidents of swapped fire extinguishing wires. This AD requires inspecting the electrical leads routed to the fire extinguishing containers for proper identification and missing labels, and to ensure the electrical leads are connected to the correct squibs; and corrective actions if necessary. We are issuing this AD to prevent the extinguishing agent of the fire extinguishing container from being delivered to the wrong engine in the event of an engine fire, and a consequent uncontrolled fire.
Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Airplanes
We are superseding an existing airworthiness directive (AD) for all EMBRAER Model ERJ 170 airplanes. That AD currently requires revising the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness (ICA) to incorporate new structural inspection requirements. Since we issued that AD, during full scale fatigue testing, cracks were found in certain structural components of the airplane. Analysis of these cracks resulted in the manufacturer modifying the ALS of EMBRAER 170 Maintenance Review Board Report (MRBR), to include new inspections tasks, or modifying the current tasks and their respective thresholds and intervals. This new AD requires revising the maintenance program to incorporate new or revised structural inspection requirements. We are issuing this AD to detect and correct fatigue cracking which could result in the loss of structural integrity of the airplane.
Airworthiness Directives; The Boeing Company Airplanes
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200 and -300 series airplanes. This AD was prompted by reports of two failures of the single-tabbed bracket on the rudder. This AD requires replacing certain single-tabbed bonding brackets in the airplane empennage with two-tabbed bonding brackets. This AD also requires, for certain airplanes, installing new bonding jumpers, and measuring the resistance of the modified installation to verify resistance is within specified limits. We are issuing this AD to prevent failure of the bonding jumper bracket, which could result in loss of lightning protection ground path, which could lead to increased lightning-induced currents and subsequent damage to composite structures, hydraulic tubes, and actuator control electronics. In the event of a lightning strike, loss of lightning ground protection could result in the loss of control of the airplane.
Airworthiness Directives; Bombardier, Inc. Airplanes
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC-8-400 series airplanes. This AD was prompted by test reports that showed that failure of a retract port flexible hose of a main landing gear (MLG) retraction actuator could cause excessive hydraulic fluid leakage. This AD requires a detailed inspection for defects and damage of the retract port flexible hose on the left and right MLG retraction actuator and replacement of the flexible hose if needed. We are issuing this AD to detect and correct defects and damage of the retract port flexible hose which could lead to an undamped extension of the MLG and could result in MLG structural failure, leading to an unsafe asymmetric landing configuration.
Airworthiness Directives; The Boeing Company Airplanes
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes. This AD was prompted by reports of cracks found in the Web pockets of the wing center section (WCS) spanwise beams. This AD requires repetitive detailed inspections and high frequency eddy current inspections for cracks of the WCS spanwise beams, and repair if necessary. We are issuing this AD to detect and correct cracking in the WCS spanwise beams, which could result in reduced structural integrity of the wings.
Airworthiness Directives; Bombardier, Inc. Airplanes
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes. This AD was prompted by reports of the air driven generator (ADG) failing to power essential buses during functional tests, due to the low threshold setting of the circuit protection on the ADG's generator control unit (GCU) preventing the ADG from supplying power to the essential buses. This AD requires installing a new or serviceable ADG GCU. We are issuing this AD to prevent loss of power from the ADG to the essential buses which, in the event of an emergency, could prevent continued safe flight.
Airworthiness Directives; Learjet Inc.
We are adopting a new airworthiness directive (AD) for all Learjet Inc., Model 45 airplanes. This AD was prompted by changes to the Airworthiness Limitations Section (ALS) of the maintenance manual, which adds life-limits, revises life-limits, or adds inspections not previously identified. This AD requires revising the maintenance program to include new or more restrictive life-limits and inspections. We are issuing this AD to limit exposure of flight critical components to corrosion, cracking, or failure due to life-limits, which if not corrected, could result in loss of roll control, fatigue cracking, or loss of structural components.
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