Noise Exposure Map Notice, Laredo International Airport, Laredo, Texas
The Federal Aviation Administration (FAA) announces its determination that the noise exposure maps submitted by the City of Laredo for Laredo International Airport under the provisions of 49 U.S.C. 47501 et Seq. (Aviation Safety and Noise Abatement Act) and 14 CFR Part 150 are in compliance with applicable requirements.
First Meeting: RTCA Special Committee 231, Special Committee 231 TAWS-GPWS
The FAA is issuing this notice to advise the public of the first meeting of the RTCA Special Committee 231, TAWS- GPWS.
Airworthiness Directives; Learjet Inc. Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Learjet Inc. Model 45 airplanes. This proposed AD was prompted by reports of non-conforming windshield supports (coupe rails). This proposed AD would require a general visual inspection to detect gouging and scratches and to determine if a radius has been removed; an ultrasound inspection to measure the dimensions of the lower coupe rails; an eddy current inspection to detect cracks of the lower coupe rails; replacement of the lower coupe rails if necessary; and revision of the maintenance or inspection program, as applicable. We are proposing this AD to detect and correct non-conforming windshield supports, which could result in uncontrolled cabin depressurization. Non-conforming windshield supports could also compromise the capability of the windshield to withstand a bird strike.
Airworthiness Directives; Airbus Airplanes
We propose to adopt a new airworthiness directive (AD) for all Airbus Model A300 and A310 series airplanes, and certain Model A300-600 series airplanes. This proposed AD was prompted by a review of certain repairs, which revealed that the structural integrity of the airplane could be affected if those repairs are not re-worked. This proposed AD would require an inspection to identify certain repairs, and corrective action if necessary. We are proposing this AD to detect and correct certain repairs on the floor cross beams flange. If those repairs are not reworked, the structural integrity of the airplane could be negatively affected.
Petition for Exemption; Summary of Petition Received
This notice contains a summary of a petition seeking relief from specified requirements of 14 CFR. The purpose of this notice is to improve the public's awareness of, and participation in, this aspect of FAA's regulatory activities. Neither publication of this notice nor the inclusion or omission of information in the summary is intended to affect the legal status of the petition or its final disposition.
Harmonization of Airworthiness Standards-Miscellaneous Structures Requirements and Harmonization of Airworthiness Standards-Gust and Maneuver Load Requirements; Corrections
The Federal Aviation Administration (FAA) is correcting notice numbers that appear in the heading of two notices of proposed rulemakings published in the Federal Register. The publications are ``Harmonization of Airworthiness StandardsMiscellaneous Structures Requirements'' (78 FR 13835, March 1, 2013) and ``Harmonization of Airworthiness StandardsGust and Maneuver Load Requirements'' (78 FR 31851, May 28, 2013). These actions address regulatory differences between the airworthiness standards of the FAA and the European Aviation Safety Agency, without affecting current industry design practices.
Airworthiness Directives; Airbus Airplanes
We are adopting a new airworthiness directive (AD) for certain Airbus Model A300 B4-600 and A300 B4-600R series airplanes. This AD was prompted by reports of cracks found in certain bottom wing skin stringers during full-scale fatigue testing and in service. This AD requires modifying the profile of stringer run-outs of both wings, including a high frequency eddy current inspection of the fastener holes for defects and, if necessary, repairs. We are issuing this AD to prevent cracking in the bottom wing skin stringers, 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-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, Model CL-600-2D24 (Regional Jet Series 900) airplanes, and Model CL- 600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by a determination that for certain slat system failure cases, the resulting slat skew could lead to failure of the slat system. This AD requires replacing certain locking plates with certain anti-migration assemblies on certain left and right wing slats. We are issuing this AD to prevent failure of the eccentric pins at the slat track attachment, and slat panels consequently disconnecting from the wing, leading to the loss of the airplane.
Airworthiness Directives; Fokker Services B.V. Airplanes
We are adopting a new airworthiness directive (AD) for certain Fokker Services B.V. Model F.28 Mark 0070 and 0100 airplanes. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the butt-joints on the forward fuselage above the passenger door are subject to widespread fatigue damage (WFD). This AD requires inspecting the forward fuselage butt-joints for cracking, repairing any crack, and eventually doing a terminating repair. We are issuing this AD to prevent fatigue cracking of such butt-joints, which could result in reduced structural integrity of the airplane and in- flight decompression of the airplane.
Airworthiness Directives; Sikorsky Aircraft Corporation (Sikorsky) Helicopters
We are adopting a new airworthiness directive (AD) for Sikorsky Model S-92A helicopters. This AD requires, initially and each time the clamps are removed, inspecting for chafing between the electrical wires and the hydraulic lines and, if there is chafing between the wires or lines, before further flight, replacing the unairworthy wires or lines with airworthy wires or lines. Also, this AD requires inspecting each clamp for correct installation, and if a clamp is incorrectly installed or missing, before further flight, correctly installing the clamps. This AD is prompted by chafing between high voltage electrical wiring and hydraulic lines that led to two fires in the top deck of the helicopter, which does not have fire detection nor extinguishing capability. The actions specified by this AD are intended to detect any chafing between the electrical wires and the hydraulic lines that could result in a fire and subsequent loss of control of the helicopter.