Federal Aviation Administration April 16, 2013 – Federal Register Recent Federal Regulation Documents

We propose to supersede two existing airworthiness directives (ADs) that apply to certain Airbus Model A330-200, A330-200 Freighter, A300-300, A340-200, A340-300, A340-500, and A340-600 series airplanes. One existing AD currently requires revising the airplane flight manual (AFM) to include appropriate operational procedures to prevent the air data inertial reference unit (ADIRU) from providing erroneous data to other airplane systems. The other existing AD currently requires revising the AFM to provide appropriate operational procedures to prevent the airplane flight directors (FDs), autopilot (AP), and auto- thrust re-engagement in the event of airspeed sources providing similar but erroneous data. Since we issued that AD, we have determined that new software standards for the flight control primary computers (FCPCs) are necessary to inhibit autopilot re-engagement under unreliable airspeed conditions. This proposed AD would require that operators modify or replace all three FCPCs with new software standards. This proposed AD would also remove certain airplanes from the applicability. We are proposing this AD to prevent autopilot engagement under unreliable airspeed conditions, which could result in reduced controllability of the airplane.

We propose to supersede an existing airworthiness directive (AD) that applies to certain The Boeing Company Model 747-400 and -400D series airplanes. The existing AD currently requires repetitive inspections to detect cracks in the floor panel attachment fastener holes of the Section 41 upper deck floor beam upper chords, and corrective actions if necessary; and repetitive post-repair and post- modification inspections, and corrective actions if necessary. Since we issued that AD, an evaluation by the design approval holder (DAH) indicated that certain upper chords of the upper deck floor beam are subject to widespread fatigue damage (WFD). A replacement was developed to support the airplane's limit of validity (LOV) of the engineering data that support the established structural maintenance program. This proposed AD would add repetitive inspections of Section 44 upper deck floor beam upper chords, and corrective actions if necessary; repetitive post-repair and post-modification inspections, and corrective actions if necessary; and replacing the upper deck floor beam upper chords. We are proposing this AD to detect and correct fatigue cracking in certain upper chords of the upper deck floor beam, which could become large and cause the floor beams to become severed and result in rapid decompression or reduced controllability of the airplane.

This action changes the name of the heliport listed in the Class E airspace for St. Helena, CA. St. Helena Fire Department Heliport has been changed to Napa County Fire Department Heliport, St. Helena, CA. This action does not change the boundaries of the airspace.

The FAA is considering a proposal to change a portion of the airport from aeronautical use to non-aeronautical use at the Freeman Municipal Airport in Seymour, Indiana. The proposal consists of approximately 2.14 acres located outside the fenced in portion of airport property. The property contains a single building that is currently unoccupied, but has been used for residential and business purposes in the past. It is the intent of the Seymour Airport Authority, as owner and operator of the Freeman Municipal Airport (SER) to sell the entire 2.14 acres, including the building. The land is not needed for aeronautical use, and will be sold for use as an aviation related business office.

This action modifies Class E airspace at Lakeview, OR, to accommodate aircraft using Area Navigation (RNAV) Global Positioning System (GPS) standard instrument approach procedures at Lakeview County Airport. This improves the safety and management of Instrument Flight Rules (IFR) operations at the airport. This action also corrects the airport name.