FAA 2008-09-15

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Costs of ComplianceThere are about 2,685 airplanes of the affected design in the worldwide fleet. This AD affectsabout 799 airplanes of U.S. registry. The required inspections take about 2 work hours per airplane, atan average labor rate of $80 per work hour. Based on these figures, the estimated cost of the AD forU.S. operators is $127,840, or $160 per airplane, per inspection cycle.Authority for This RulemakingTitle 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety.Subtitle I, section 106, describes the authority of the FAA Administrator. ''Subtitle VII: AviationPrograms,'' describes in more detail the scope of the Agency's authority.We are issuing this rulemaking under the authority described in ''Subtitle VII, Part A, Subpart III,Section 44701: General requirements.'' Under that section, Congress charges the FAA with promotingsafe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, andprocedures the Administrator finds necessary for safety in air commerce. This regulation is within thescope of that authority because it addresses an unsafe condition that is likely to exist or develop onproducts identified in this rulemaking action.Regulatory FindingsThis AD will not have federalism implications under Executive Order 13132. This AD will nothave a substantial direct effect on the States, on the relationship between the national government andthe States, or on the distribution of power and responsibilities among the various levels ofgovernment.For the reasons discussed above, I certify that this AD:(1) Is not a ''significant regulatory action'' under Executive Order 12866,(2) Is not a ''significant rule'' under DOT Regulatory Policies and Procedures (44 FR 11034,February 26, 1979), and(3) Will not have a significant economic impact, positive or negative, on a substantial number ofsmall entities under the criteria of the Regulatory Flexibility Act.You can find our regulatory evaluation and the estimated costs of compliance in the AD Docket.List of Subjects in 14 CFR Part 39Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.Adoption of the AmendmentAccordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part39 as follows:PART 39–AIRWORTHINESS DIRECTIVES1. The authority citation for part 39 continues to read as follows:Authority: 49 U.S.C. 106(g), 40113, 44701.§ 39.13 [Amended]2. The FAA amends § 39.13 by adding the following new AD:4
FAAAircraft Certification ServiceAIRWORTHINESS DIRECTIVEwww.faa.gov/aircraft/safety/alerts/www.gpoaccess.gov/fr/advanced.html2008-09-15 Boeing: Amendment 39-15496. Docket No. FAA-2007-0046; Directorate Identifier2007-NM-173-AD.Effective Date(a) This airworthiness directive (AD) is effective June 6, 2008.Affected ADs(b) None.Applicability(c) This AD applies to all Boeing Model 737-100, -200, -200C, -300, -400, and -500 seriesairplanes, certificated in any category.Unsafe Condition(d) This AD results from reports of in-flight departure and separation of flight deck windows.We are issuing this AD to detect and correct cracking in the vinyl interlayer or damage to thestructural inner glass panes of the flight deck No. 2, No. 4, and No. 5 windows, which could result inloss of a window and rapid loss of cabin pressure. Loss of cabin pressure could cause crewcommunication difficulties or crew incapacitation.Compliance(e) You are responsible for having the actions required by this AD performed within thecompliance times specified, unless the actions have already been done.Repetitive Inspections and Replacement(f) At the applicable times specified in Tables 1, 2, and 3 of paragraph 1.E. of Boeing AlertService Bulletin 737-56A1023, dated May 24, 2007, except as provided by paragraph (g) of this AD:Do the internal and external detailed inspections for any cracking of or damage to the left side andright side flight deck No. 2, No. 4, and No. 5 windows and do the applicable corrective actions beforefurther flight, by accomplishing all of the applicable actions specified in the AccomplishmentInstructions of the service bulletin. Repeat the inspections thereafter at the applicable intervalspecified in paragraph 1.E. of the service bulletin.Exception to Compliance Times(g) Where Tables 1, 2, and 3 of paragraph 1.E. of Boeing Alert Service Bulletin 737-56A1023,dated May 24, 2007, specify counting the compliance time from ''* * * the date on this servicebulletin,'' this AD requires counting the compliance time from the effective date of this AD.5
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FAA 2008-09-15

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