Noise Certification Standards for Tiltrotors
This rule amends the regulations governing noise certification standards for issuing type and airworthiness certificates for a new civil, hybrid airplane-rotorcraft known as the tiltrotor. This noise standard establishes new noise limits and procedures as the basis to ensure consistent aviation noise reduction technology is incorporated in tiltrotors for environmental protection. It provides uniform noise certification standards for tiltrotors certificated in the United States and harmonizes the U.S. regulations with the standards of the International Civil Aviation Organization's (ICAO) Annex 16.
Explosive Siting Requirements; Correction
The FAA is correcting a final rule published on September 7, 2012 (77 FR 55108). In that rule, the FAA amended its regulations to the requirements for siting explosives under a license to operate a launch site. The rule increases flexibility for launch site operators in site planning for the storage and handling of energetic liquids and explosives. The FAA inadvertently did not correctly identify the Department of Defense Explosives Safety Board. This document corrects the error.
Airworthiness Directives; Cessna Aircraft Company Airplanes
We propose to revise an existing airworthiness directive (AD) that applies to all Cessna Aircraft Company (Cessna) Models 190, 195 (L-126A,B,C), 195A, and 195B airplanes that are equipped with certain inboard aileron hinge brackets. The existing AD currently requires you to repetitively inspect the affected inboard aileron hinge brackets for cracks or corrosion and replace them if cracks or corrosion is found. Replacement with aluminum brackets would terminate the need for the repetitive inspections. Since we issued AD 2004-21-08, the FAA, in recent months, has received reports of confusion between the casting number on the aileron hinge bracket and the part number (P/N) called out in the AD. This proposed AD would retain the actions of AD 2004-21- 08 while requiring future compliance following a revised service bulletin that clarifies the casting numbers and part numbers to be inspected. We are proposing this AD to correct the unsafe condition on these products.