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Rescission of the Source-Specific Federal Implementation Plan for Navajo Generating Station, Navajo Nation
The Environmental Protection Agency (EPA) is proposing to rescind the federal implementation plan (FIP) that regulates emissions from the Navajo Generating Station (NGS), a coal-fired power plant that was located on the reservation lands of the Navajo Nation near Page, Arizona. NGS permanently ceased operations on November 18, 2019, and the...
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Air Plan Approval; Texas; Revisions to the Texas Diesel Emissions Reduction Incentive Program
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve a revision to the Texas State Implementation Plan (SIP) that pertains to the Texas Diesel Emissions Reduction Incentive Program, submitted on August 13, 2020.
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Approval and Promulgation of Implementation Plans; Utah; Source Category Exemptions Revisions
The Environmental Protection Agency (EPA) is proposing to approve the State of Utah's Source Category Exemptions Revisions as submitted on November 5, 2019. The EPA is taking this action pursuant to the Clean Air Act (CAA).
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Air Plan Approval; Connecticut; Definitions of Emergency and Emergency Engine
The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Connecticut on December 20, 2019. This revision amends the State's definitions of ``emergency'' and ``emergency engine'' in its air quality regulations. The intended effect of this action is to propose approval...
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Air Plan Approval; Ohio; Lead
The Environmental Protection Agency (EPA) is proposing to approve revisions to the Ohio State Implementation Plan (SIP). Ohio removed its Ohio Administrative Code (OAC) rules that apply to a secondary lead smelter, which has permanently shut down. EPA is proposing approval of revisions that will remove those OAC rules from the Ohio SIP. The...
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Approval and Promulgation of Air Quality Implementation Plans; District of Columbia; Emissions Statement Certification for the 2015 Ozone National Ambient Air Quality Standard
The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision formally submitted by the District of Columbia Department of Energy and the Environment (DOEE). Under the Clean Air Act (CAA), a state's SIP must include an emission statement regulation that requires stationary sources in ozone...
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Air Plan Approval; Ohio; Infrastructure SIP Requirements for the 2015 Ozone NAAQS
The Environmental Protection Agency (EPA) is proposing to approve elements of a state implementation plan (SIP) submission from Ohio regarding the infrastructure requirements of section 110 of the Clean Air Act (CAA) for the 2015 ozone National Ambient Air Quality Standards (NAAQS). The infrastructure requirements are designed to ensure that the...
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Air Approval Plans; Texas; Reasonably Available Control Technology in the Houston-Galveston-Brazoria Ozone Nonattainment Area
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve the May 13, 2020 revisions to the Texas State Implementation Plan (SIP) concerning Reasonably Available Control Technology (RACT) requirement for the Houston-Galveston-Brazoria (HGB), 2008 8-hour ozone National Air Quality...
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Air Plan Approval; Pennsylvania; Regulatory Updates to Nonattainment New Source Review (NNSR) Permitting Requirements for 2012 PM2.5
The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the Commonwealth of Pennsylvania, on March 10, 2020. This revision pertains to the Pennsylvania Department of Environmental Protection Agency's (PADEP) amendments to 25 Pa. Code Chapters 121 (General Provisions) and 127...
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Air Plan Approval; California; El Dorado County Air Quality Management District; South Coast Air Quality Management District
The Environmental Protection Agency (EPA) is proposing to approve revisions to the El Dorado County Air Quality Management District (EDCAQMD) and the South Coast Air Quality Management District (SCAQMD) portions of the California State Implementation Plan (SIP). These revisions concern emissions of volatile organic compounds (VOC) from...
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Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines
The FAA proposes to adopt a new airworthiness directive (AD) for all Pratt & Whitney Canada Corp. (P&WC) PW210A and PW210S model turboshaft engines. This proposed AD was prompted by a report from the manufacturer that the Automated Damage Tracking System (ADTS) may under-count the number of cycles accrued by the impeller and the high- pressure...
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Airworthiness Directives; The Boeing Company Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 767-200, -300, -300F, and -400ER series airplanes. This proposed AD was prompted by significant changes made to the airworthiness limitations (AWLs) related to fuel tank ignition prevention and the nitrogen generation system. This proposed AD would...
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Airworthiness Directives; Airbus Helicopters
The FAA proposes to supersede Airworthiness Directive (AD) 2019-03-12, which applies to certain Airbus Helicopters Model EC225LP helicopters. AD 2019-03-12 requires repetitively inspecting, cleaning, and lubricating each life raft inflation cylinder percussion system bellcrank (bellcrank). Since the FAA issued AD 2019-03-12, the FAA determined...
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Airworthiness Directives; Safran Helicopter Engines, S.A. (Type Certificate Previously Held by Turbomeca, S.A.) Turboshaft Engines
The FAA proposes to adopt a new airworthiness directive (AD) for all Safran Helicopter Engines, S.A. Arriel 2C and Arriel 2S1 model turboshaft engines. This proposed AD was prompted by reports of error messages on the full authority digital engine control (FADEC) B digital engine control unit (DECU), caused by blistering of the varnish on the...
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Airworthiness Directives; Airbus SAS Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus SAS Model A350-941 and -1041 airplanes. This proposed AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This proposed AD would require revising the existing maintenance or inspection program, as applicable, to...
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Airworthiness Directives; Bombardier, Inc., Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This proposed AD was prompted by a report that the inboard multi-function spoiler (MFS) surfaces failed to deploy, which was caused by missing notches on the piston seal of the MFS power control units (PCUs). This proposed AD...
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Airworthiness Directives; General Electric Company Turbofan Engines
The FAA proposes to adopt a new airworthiness directive (AD) for certain General Electric Company (GE) GEnx-2B67, GEnx-2B67/P, and GEnx-2B67B model turbofan engines. This proposed AD was prompted by a report of a crack in the lower fuel manifold causing fuel leakage. This proposed AD would require an ultrasonic inspection (USI) or a fluorescent...
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Airworthiness Directives; Airbus Helicopters (Type Certificate Previously Held by Eurocopter France) Helicopters
The FAA proposes to supersede Airworthiness Directive (AD) 2010-16-51, which applies to certain Eurocopter France (now Airbus Helicopters (Airbus)) Model SA330J helicopters. AD 2010-16-51 requires inspecting for a gap between the main gearbox (MGB) oil cooling fan assembly (fan) rotor blade and the upper section of the guide vane bearing housing...
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Airworthiness Directives; Hamilton Sundstrand Corporation Propellers
The FAA proposes to supersede Airworthiness Directive (AD) 2020-12-07, which applies to certain Hamilton Sundstrand Corporation (Hamilton Sundstrand) 54H model propellers. AD 2020-12-07 requires initial and repetitive eddy current inspections (ECI) of certain propeller blades and replacement of the propeller blades that fail the inspection....
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Airworthiness Directives; Airbus SAS Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus SAS Model A319-171N airplanes, Model A320-271N, -272N, and -273N airplanes, and Model A321-271N, -272N, -271NX, and -272NX airplanes. This proposed AD was prompted by a report indicating that during a full scale fatigue test of the forward engine mounts, premature wear...