Department of Transportation April 24, 2008 – Federal Register Recent Federal Regulation Documents
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Airworthiness Directives; Boeing Model 737-300, -400, and -500 Series Airplanes
The FAA proposes to supersede an existing airworthiness directive (AD) that applies to all Boeing Model 737-300, -400, and -500 series airplanes. The existing AD currently requires repetitive inspections for discrepancies of the fuselage skin under the dorsal fin assembly, and repairing if necessary. This proposed AD would require an inspection for any chafing or crack in the fuselage skin and abrasion resistant coating at the dorsal fin landing, an inspection for damage to the dorsal fin seals, attach clip, and seal retainer, and other specified and corrective actions as necessary. The new proposed requirements would end the need for the existing repetitive inspections. This proposed AD results from a report of an 18-inch crack found in the fuselage skin area under the blade seals of the nose cap of the dorsal fin due to previous wear damage, and additional reports of fuselage skin wear. We are proposing this AD to prevent discrepancies of the fuselage skin, which could result in fatigue cracking due to cabin pressurization and consequent rapid in-flight decompression of the airplane fuselage.
Airworthiness Directives; Boeing Model 737-600, -700, -700C, -800, -900, and 900ER Series Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Boeing Model 737-600, -700, -700C, -800, -900, and 900ER series airplanes. This proposed AD would require replacing the pushrods for the left and right elevator tab control mechanisms with new, improved pushrods. This proposed AD results from a report of a rod end fracture on a rudder Power Control Unit (PCU) control rod, which is similar to the ones used for the elevator tab pushrods. Analysis revealed that the fractured rod end had an incorrect hardness, which had probably occurred during the manufacture of the control rod. We are proposing this AD to prevent fracture of the elevator tab pushrod ends, which could result in excessive in-flight vibrations of the elevator tab, possible loss of the elevator tab, and consequent loss of controllability of the airplane.
Reports, Forms and Record Keeping Requirements; Agency Information Collection Activity Under OMB Review
In compliance with the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.), this notice announces that the Information Collection Request (ICR) abstracted below regarding motorcycle helmet labels has been forwarded to the Office of Management and Budget (OMB) for review and comment. The ICR describes the nature of the information collections and their expected burden. The Federal Register Notice with a 60-day comment period was published on February 1, 2008 [73 FR 6554]. The docket number is NHTSA-2008-0023. The agency received eight comments on this collection item. Two comments questioned the effectiveness of motorcycle helmet laws. This notice is not intended to address state or local helmet laws and therefore the comments are not relevant to this notice. Three comments were related to testing specifications of FMVSS No. 218. This notice does not change FMVSS No. 218 testing specifications. Consequently these comments are outside the scope of this notice. One comment recommended doing away with motorcycle helmet labels and two other comments suggested that collection of this information by NHTSA was unnecessary. The agency does not agree that motorcycle helmet labels or the information collection should be eliminated. These labels provide consumers with the assurance that the helmet meets FMVSS No. 218 minimum performance requirements. Assurance that a helmet meets FMVSS No. 218 is important to consumers because the standard specifies minimum performance requirements that are designed to reduce deaths and injuries to motorcyclists. The agency believes that it is important for consumers to be able to distinguish between helmets that meet FMVSS No. 218 requirements and those that do not.
Highway Safety Improvement Program
The purpose of this notice of proposed amendments is to revise Part 924 to incorporate changes to the Highway Safety Improvement Program (HSIP) that resulted from the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU), as well as to reflect changes in the overall program that have evolved since 23 CFR part 924 was originally written.
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