IFR Altitudes; Miscellaneous Amendments
This amendment adopts miscellaneous amendments to the required IFR (instrument flight rules) altitudes and changeover points for certain Federal airways, jet routes, or direct routes for which a minimum or maximum en route authorized IFR altitude is prescribed. This regulatory action is needed because of changes occurring in the National Airspace System. These changes are designed to provide for the safe and efficient use of the navigable airspace under instrument conditions in the affected areas.
Proposed Amendment of Class E Airspace; Taos, NM
This action proposes to modify Class E airspace extending upward from 700 feet above the surface at Taos Regional Airport, Taos, NM. Decommissioning of non-directional radio beacon (NDB) and cancellation of the NDB approaches due to advances in Global Positioning System (GPS) capabilities have made this action necessary for the safety and management of Instrument Flight Rules (IFR) operations at Taos Regional Airport.
Proposed Amendment of Class E Airspace; Little Rock, AR
This action proposes to amend Class E airspace at Little Rock Air Force Base (AFB), Little Rock, AR. Airspace reconfiguration is necessary due to closure of the air traffic control tower and associated approaches at Dennis F. Cantrell Field, Conway, AR. Dennis F. Cantrell Field would be removed from the airspace designation and legal description as it is no longer needed to describe the boundaries of Little Rock AFB. The FAA is proposing this action for continued safety within the National Airspace System (NAS). Additionally, the geographic coordinates for Little Rock AFB and Saline County Airport, Benton, AR, would be adjusted.
Proposed Modification of Federal Airway V-506; Kotzebue, AK
This action proposes to modify Alaskan VOR Federal airway V- 506 by lowering the floor of class E controlled airspace due to the establishment of a lower global navigation satellite system (GNSS) minimum enroute altitude (MEA). This action would allow maximum use of the airspace.
Airworthiness Directives; The Boeing Company Airplanes
We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 787-8 airplanes. This proposed AD was prompted by a report that a captain's seat moved uncommanded during a landing rollout due to a failure in the seat horizontal actuator. This proposed AD would require repetitive tests of the captain and first officer seat assemblies for proper operation, and corrective action if necessary. This proposed AD would also require installing new captain and first officer seat assemblies, which would terminate the repetitive tests. We are proposing this AD to prevent a seat actuator clutch failure, which could result in a loss of seat locking and uncommanded motion of the captain's or first officer's seat; uncommanded seat movement could result in reduced controllability of the airplane.
Airworthiness Directives; Airbus Airplanes
We propose to adopt a new airworthiness directive (AD) for all Airbus Model A300 series airplanes; Model A300 B4-600, B4-600R, F4-600R series airplanes, and Model A300 C4-605R Variant F airplanes (collectively called Model A300-600 series airplanes); and Model A310 series airplanes. This proposed AD was prompted by reports of partial loss of no-back brake (NBB) efficiency on the trimmable horizontal stabilizer actuator (THSA). This proposed AD would require an inspection to determine THSA part number, serial numbers, and flight cycles on certain THSAs; and repetitive replacement for certain THSAs. We are proposing this AD to prevent loss of THSA NBB efficiency, which in conjunction with the power gear not able to keep the ball screw in its last commanded position, could lead to an uncommanded movement of the horizontal stabilizer, possibly resulting in loss of control of the airplane.