Federal Aviation Administration April 16, 2014 – Federal Register Recent Federal Regulation Documents

The FAA is issuing this notice to advise the public of the first meeting of the RTCA Special Committee 231, TAWS- GPWS.

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.

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.

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.

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.