Federal Aviation Administration July 12, 2006 – Federal Register Recent Federal Regulation Documents

The FAA proposes to supersede an existing airworthiness directive (AD) that applies to certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. The existing AD currently requires repetitive inspections for cracks, sealant damage, and corrosion of the main fittings of the main landing gear (MLG), and corrective actions if necessary. This proposed AD would reduce the compliance times for inspecting certain low-utilization airplanes, and provide a terminating action for the repetitive inspections. This proposed AD results from a report of a cracked main fitting of the MLG. We are proposing this AD to detect and correct fatigue cracking of the main fitting of the MLG and consequent failure of the main fitting, which could result in the collapse of the MLG.

This document revises an earlier supplemental notice of proposed rulemaking (NPRM), applicable to all Gulfstream Aerospace Corporation Model G-159 airplanes, that would have required repetitive non-destructive testing inspections to detect corrosion of the skin of certain structural assemblies, and corrective action if necessary. The first supplemental NPRM also would have required x-ray and ultrasonic inspections to detect corrosion and cracking of the splicing of certain structural assemblies, and repair if necessary. This new action revises the proposed rule by limiting the time certain repetitive inspections may be repeated before corrective action must be taken. The actions specified by this new proposed supplemental AD are intended to detect and correct corrosion and cracking of the lower wing plank splices and spot-welded skins of certain structural assemblies, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

On June 16, 2006, we published a document on special conditions for Cessna Aircraft Company on the Model 510 airplane for full authority digital engine control system. There was an error in the background of the document in reference to the future type certificate number. This notice removes that sentence from the background; no change to the special conditions portion is necessary.

The FAA proposes to rule and invites public comment on the release of land at the Aransas County Airport under the provisions of section 125 of the Wendell H. Ford Aviation Investment Reform Act for the 21st Century (AIR 21).

The FAA invites public comments about our intention to request the Office of Management and Budget (OMB) to approve a current information collection. This information is needed to identify and track regulated entities required to implement anti-drug and alcohol misuse prevention programs as well as those companies that opt to implement programs.