Federal Aviation Administration February 25, 2021 – Federal Register Recent Federal Regulation Documents

Amendment of Restricted Area R-4305; Lake Superior, MN
Document Number: 2021-03878
Type: Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
This action amends the using agency listed for Restricted Area R-4305, Lake Superior, MN. Specifically, this action changes the using agency from ``USAF, 55th Wing, Offutt AFB, NE'' (55th Wing), to ``U.S. Air Force, 148th Fighter Wing, Duluth International Airport, MN'' (148th Fighter Wing). There are no changes to the boundaries, designated altitudes, time of designation, or activities conducted within the restricted area.
Airworthiness Directives; Airbus Helicopters
Document Number: 2021-03664
Type: Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model SA-365N, SA-365N1, AS-365N2, AS 365 N3, EC 155B, and EC155B1 helicopters. This AD was prompted by the FAA's determination that to improve the process and performance in collecting metal particles in the main gear box (MGB) certain existing magnetic plugs (electrical and nonelectrical) installed in the MGB pump intake must be replaced with improved non-electrical magnetic plugs. This AD requires replacing the existing magnetic plug with an improved non- electrical magnetic plug, as specified in a European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; Leonardo S.p.a. Helicopters
Document Number: 2021-03663
Type: Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
The FAA is superseding Airworthiness Directive (AD) 2020-13-02 for Leonardo S.p.A. (Leonardo) Model A119 and AW119 MKII helicopters. AD 2020-13-02 required inspecting for movement and the tightening torque of the tail rotor (T/R) plug, the installation of the outboard and inboard faces of the T/R duplex bearing, and the condition of the T/R duplex bearing, T/R plug threads, and nut threads. Depending on the inspection results, AD 2020-13-02 required corrective actions and reporting information. This new AD retains the requirements of AD 2020- 13-02 except the reporting requirement, updates the service information, and requires repeating the inspection. This AD was prompted by Leonardo's update to the service information. The actions of this AD are intended to address an unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters
Document Number: 2021-03662
Type: Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
The FAA is superseding Airworthiness Directive (AD) 2018-05- 09, which applied to all Airbus Helicopters Model AS332C, AS332C1, AS332L, and AS332L1 helicopters. AD 2018-05-09 required inspecting the tail rotor (T/R) flapping hinge link (hinge) and reporting the results. This AD requires repetitive inspections of the spindle bolts and the inner ring and needle bearings of each flapping hinge, corrective actions if necessary, and repetitive replacements of affected flapping hinge components, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. Replacement of all affected flapping hinge components on each flapping hinge is terminating action for the repetitive inspections. This AD also expands the applicability. This AD was prompted by a report of a damaged flapping hinge on a T/R blade. The FAA is issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; AgustaWestland S.p.A. (Type Certificate Formerly Held by Agusta S.p.A) (Agusta) Helicopters
Document Number: 2021-03661
Type: Proposed Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
The FAA is withdrawing a notice of proposed rulemaking (NPRM) that proposed to supersede Airworthiness Directive (AD) 2011-18-52, which applies to certain Agusta Model AB139 and AW139 helicopters. AD 2011-18-52 requires establishing a revised life limit for each tail rotor blade (blade), updating the existing historical records for your helicopter, repetitively inspecting each blade for a crack, and replacing certain blades. The NPRM was prompted by the manufacturer developing an improved blade using different materials and establishing life limits for those newly-designed blades. The NPRM proposed to require expanding the applicability to include the newly-designed blades and establish their life limits, and proposed to retain the requirement to inspect each blade for a crack and, if there is a crack, replace each blade with an airworthy blade. Since issuance of the NPRM, the FAA has determined that the NPRM does not adequately address the identified unsafe condition. Accordingly, the NPRM is withdrawn.
Airworthiness Directives; Leonardo S.p.a. Helicopters
Document Number: 2021-03660
Type: Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. (Leonardo) Model AB139 and AW139 helicopters. This AD requires removing certain engine mounting rods from service and prohibits their installation on any helicopter. This AD was prompted by a report of non-conforming engine mounting rods. The actions of this AD are intended to address an unsafe condition on these products.
Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters
Document Number: 2021-03659
Type: Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited (type certificate previously held by Bell Helicopter Textron Canada Limited) Model 429 helicopters. This AD was prompted by the introduction of a new life limit for the centrifugal force bearing (CFB). This AD requires determining the accumulated retirement index number (RIN) and removing each affected CFB from service before it accumulates 8,000 total RIN. The FAA is issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; Leonardo S.p.a. Helicopters
Document Number: 2021-03658
Type: Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. (Leonardo) Model AW189 helicopters. This AD requires various repetitive inspections of the main rotor (MR) damper. This AD was prompted by reports of in-service MR damper failures and the development of an improved MR damper. This condition, if not corrected, could lead to loss of the lead-lag damping function of the MR blade, possibly resulting in damage to adjacent critical rotor components and subsequent loss control of the helicopter. The actions of this AD are intended to address the unsafe condition on these products.
Airworthiness Directives; Airbus Helicopters
Document Number: 2021-03657
Type: Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
The FAA is adopting a new airworthiness directive (AD) for Airbus Helicopters Model AS350B3 helicopters. This AD requires modifying the electrical system of the throttle twist grip, inspecting the routing of a microswitch electrical harness, and correcting the electrical harness routing if it is incorrect. This AD was prompted by reports of the engine remaining in idle when the twist grip was turned from the ``forced idle'' position to the ``flight'' position. The actions of this AD are intended to address an unsafe condition on these products.
Airworthiness Directives; Robinson Helicopter Company Model R22 Series Helicopters
Document Number: 2021-03655
Type: Proposed Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
The FAA is withdrawing a notice of proposed rulemaking (NPRM) that proposed to adopt a new airworthiness directive (AD) that would have applied to Robinson Helicopter Company (RHC) Model R22 series helicopters. The NPRM was prompted by an in-flight break up of a helicopter on which both teeter stop brackets (brackets) failed. The NPRM would have required replacing each main rotor blade (blade) droop and teeter stop (stop) and bracket and associated hardware with redesigned and improved airworthy parts. Since issuance of the NPRM, the FAA has determined that failure of the brackets was caused by turbulence and other factors that are addressed in AD 95-26-04. Accordingly, the NPRM is withdrawn.
Airworthiness Directives; Hamilton Sundstrand Corporation Propellers
Document Number: 2021-03607
Type: Proposed Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
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. Since the FAA issued AD 2020-12-07, the manufacturer determined that all propeller blades installed on Hamilton Sundstrand 54H model propellers with a 54H60 model propeller hub are susceptible to intergranular corrosion cracking in the blade taper bore. This proposed AD would require initial and repetitive ECI of all propeller blades installed on Hamilton Sundstrand 54H60 propeller hubs and replacement of any propeller blade that fails inspection. The FAA is proposing this AD to address the unsafe condition on these products.
Amendment of Restricted Areas R-3008A, R-3008B, R-3008C, and R-3008D; Grand Bay Weapons Range, GA
Document Number: 2021-01021
Type: Rule
Date: 2021-02-25
Agency: Federal Aviation Administration, Department of Transportation
This action amends the time of designation for restricted areas R-3008A, R-3008B, R-3008C, and R-3008D; Grand Bay Weapons Range, GA, by expanding the timeframe during which the areas may be activated without prior issuance of a Notice to Airmen (NOTAM). The expansion of the published designated times for these restricted areas reflects their routine actual use. This change better informs the flying public of actual routine use periods of the restricted areas and reduces NOTAM System workload.