Federal Aviation Administration March 23, 2021 – Federal Register Recent Federal Regulation Documents

Airworthiness Directives; Airbus Helicopters
Document Number: 2021-05883
Type: Proposed Rule
Date: 2021-03-23
Agency: Federal Aviation Administration, Department of Transportation
The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Helicopters Model SA-365N, SA-365N1, AS-365N2, and AS 365 N3 helicopters. This proposed AD was prompted by a report that damage (scorch marks) was found on an internal life raft installation that contained a half rescue kit. This proposed AD would require identifying the part number and serial number of each half rescue kit located in the internal life raft installation and, depending on the findings, inspecting the life raft for damage, inspecting the condition of the flashlight battery, testing the flashlight battery, and replacing the life raft or flashlight battery (including the leak test) as applicable, as specified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.
Proposed Amendment of Class D and E Airspace; Sioux City, IA
Document Number: 2021-05854
Type: Proposed Rule
Date: 2021-03-23
Agency: Federal Aviation Administration, Department of Transportation
This action proposes to amend the Class D and Class E airspace at Sioux Gateway Airport/Brigadier General Bud Day Field, Sioux City, IA. The FAA is proposing this action as the result of an airspace review caused by the decommissioning of the Sioux City VHF omnidirectional range (VOR) navigation aid as part of the VOR Minimum Operational Network (MON) Program. The name and geographic coordinates of the airport would also be updated to coincide with the FAA's aeronautical database.
Proposed Amendment of Class E Airspace; Neosho, MO
Document Number: 2021-05853
Type: Proposed Rule
Date: 2021-03-23
Agency: Federal Aviation Administration, Department of Transportation
This action proposes to amend the Class E airspace at Neosho Hugh Robinson Airport, Neosho, MO. The FAA is proposing this action as the result of an airspace review caused by the decommissioning of the Neosho VHF omnidirectional range (VOR) navigation aid as part of the VOR Minimum Operational Network (MON) Program.
Revocation of Class E Airspace; Kayenta, AZ
Document Number: 2021-05601
Type: Rule
Date: 2021-03-23
Agency: Federal Aviation Administration, Department of Transportation
This action revokes the Class E airspace established for Bedard Field Airport, Kayenta, AZ. The special instrument procedures that were developed for the private airport have been canceled. The Class E airspace is no longer required.
Airworthiness Directives; CFM International, S.A. Turbofan Engines
Document Number: 2021-05600
Type: Proposed Rule
Date: 2021-03-23
Agency: Federal Aviation Administration, Department of Transportation
The FAA is revising a notice of proposed rulemaking (NPRM) that applied to certain CFM International, S.A. (CFM) CFM56-5B, CFM56- 5C, and CFM56-7B model turbofan engines with a certain rotating air high-pressure turbine (HPT) front seal. This action revises the NPRM by requiring CFM56-5B or CFM56-7B model turbofan engines with an installed reconfigured rotating air HPT front seal, which was previously installed and operated in a CFM56-5C model turbofan engine, to follow the removal requirements for the CFM56-5C model turbofan engine. The FAA is proposing this airworthiness directive (AD) to address the unsafe condition on these products. Since these actions would impose an additional burden over those in the NPRM the agency is requesting comments on this SNPRM.
Amendment of Class E Airspace; Buena Vista, CO
Document Number: 2021-05599
Type: Rule
Date: 2021-03-23
Agency: Federal Aviation Administration, Department of Transportation
This action modifies the Class E airspace extending upward from 700 feet above the surface at Central Colorado Regional Airport, Buena Vista, CO. This action modifies the airspace to properly contain instrument flight rules (IFR) aircraft departing and arriving at the airport. Additionally, this action removes the Class E airspace extending upward from 1,200 feet above the surface. This airspace is wholly contained within the Denver en route airspace area and duplication is not necessary. Lastly, this action implements an administrative update to the airport's name.
Airworthiness Directives; CFM International, S.A. Turbofan Engines
Document Number: 2021-05591
Type: Proposed Rule
Date: 2021-03-23
Agency: Federal Aviation Administration, Department of Transportation
The FAA proposes to adopt a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) LEAP-1A23, LEAP-1A24, LEAP- 1A24E1, LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2, and LEAP-1A35A model turbofan engines. This proposed AD was prompted by a report of a manufacturing quality escape found during an inspection of a high- pressure turbine (HPT) case. This proposed AD would require the removal from service of the affected HPT case. The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; Piper Aircraft, Inc. Airplanes
Document Number: 2021-05584
Type: Proposed Rule
Date: 2021-03-23
Agency: Federal Aviation Administration, Department of Transportation
The FAA proposes to supersede Airworthiness Directive (AD) 79- 01-03, which applies to certain Piper Aircraft, Inc. (Piper) Model PA- 36-285 airplanes, and AD 83-20-03, which applies to Piper Models PA-36- 285, PA-36-300, and PA-36-375 airplanes. AD 79-01-03 requires repetitive inspections of the spar carry through assembly until it is replaced with a different part numbered spar carry through assembly. AD 83-20-03 establishes life limits for the wing spar structural components. Since the FAA issued AD 79-01-03 and AD 83-20-03, the FAA identified inspection and life limit requirements that were inadvertently omitted from those ADs. This proposed AD would retain the requirements in AD 79-01-03 and AD 83-20-03 and require the spar carry through assembly inspection from AD 79-01-03 for additional airplanes and add life limits for certain wing structural components previously omitted from AD 83-20-03 for certain serial numbered airplanes. The FAA is proposing this AD to address the unsafe condition on these products.
Airworthiness Directives; Bell Textron Canada Limited Helicopters
Document Number: 2021-04200
Type: Proposed Rule
Date: 2021-03-23
Agency: Federal Aviation Administration, Department of Transportation
The FAA proposes to adopt a new airworthiness directive (AD) for Bell Textron Canada Limited (Bell) Model 429 helicopters. This proposed AD would require inspecting certain serial-numbered Emergency Flotation System (EFS) inflation hoses and depending on the results of those inspections, marking certain parts or removing certain parts from service. This proposed AD was prompted by a report that a float compartment on an EFS did not inflate. The actions of this proposed AD are intended to address an unsafe condition on these products.