Federal Aviation Administration December 2, 2011 – Federal Register Recent Federal Regulation Documents

This rule amends the airworthiness standards for fatigue tolerance evaluation (FTE) of transport category rotorcraft metallic structures. This revises the FTE safety requirements to address advances in structural fatigue substantiation technology for metallic structures. This provides an increased level of safety by avoiding or reducing the likelihood of the catastrophic fatigue failure of a metallic structure. These increased safety requirements will help ensure that should serious accidental damage occur during manufacturing or within the operational life of the rotorcraft, the remaining structure could withstand, without failure, any fatigue loads that are likely to occur, until the damage is detected or the part is replaced. Besides improving the safety standards for FTE of all principal structural elements (PSEs), the amendment is harmonized with international standards.

This action modifies Class E airspace at Emmonak, AK. The revision of two standard instrument approach procedures at the Emmonak Airport has made this action necessary to enhance safety and management of Instrument Flight Rules (IFR) operations.

We are adopting a new airworthiness directive (AD) for certain Quest Aircraft Design, LLC (Quest) Model Kodiak 100 airplanes. This AD requires you to inspect the torque of the inertial particle separator (IPS) bolts; correct the torque, if necessary; replace the IPS bolts with new IPS bolts within a certain time; and install safety wire around the new IPS bolts. This AD was prompted by five instances where a loose IPS bolt was found on the right-hand side of the engine bypass door attachment. This condition, if not corrected, could lead to an inoperable bypass door, which could result in engine inlet icing with consequent loss of engine power and forced landing. We are issuing this AD to correct the unsafe condition on these products.

This action establishes Class E airspace for Stuart, IA, to accommodate new COPTER area navigation (RNAV) Standard Instrument Approach Procedures at the City of Stuart Helistop. The FAA is taking this action to enhance the safety and management of Instrument Flight Rule (IFR) operations at the heliport.

This action enhances safety by amending the applicable standards for part 23 turbofan- and turbojet-powered airplaneswhich are commonly referred to as ``part 23 jets,'' or ``jets''as well as turbopropeller-driven and reciprocating-engine airplanes, to reflect the current needs of industry, accommodate future trends, address emerging technologies, and provide for future airplane operations. This action is necessary to eliminate the current workload of processing exemptions, special conditions, and equivalent level of safety findings necessary to certificate jets. The effect of the changes will: Enhance safety by requiring additional battery endurance requirements; increase the climb gradient performance for certain part 23 airplanes; standardize and simplify the certification of jets; clarify areas of frequent non-standardization and misinterpretation, particularly for electronic equipment and system certification; and codify existing certification requirements in special conditions for jets that incorporate new technologies.