Daily Rules, Proposed Rules, and Notices of the Federal Government
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD as of January 7, 2013.
You may examine the AD docket on the Internet at
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM published in the
We gave the public the opportunity to participate in developing this AD. The following presents the comment received on the proposal (77 FR 50414, August 21, 2012) and the FAA's response to the comment.
Aviation Partners Boeing (APB) stated that the installation of winglets per Supplemental Type Certificate (STC) ST01219SE does not affect them.
We have added paragraph (c)(2) to this AD to state that installation of STC ST01219SE (
We reviewed the relevant data, considered the comment received, and determined that air safety and the public interest require adopting the AD with the change described previously and minor editorial changes. We have determined that these minor changes:
• Are consistent with the intent that was proposed in the NPRM (77 FR 50414, August 21, 2012) for correcting the unsafe condition; and
• Do not add any additional burden upon the public than was already proposed in the NPRM (77 FR 50414, August 21, 2012).
We also determined that these changes will not increase the economic burden on any operator or increase the scope of the AD.
We estimate that this AD affects 612 airplanes of U.S. registry.
We estimate the following costs to comply with this AD:
We estimate the following costs to do certain necessary conditional actions that would be required based on the results of the inspection. We have no way of determining the number of aircraft that might need these actions:
We have received no definitive data that would enable us to provide a cost estimate for the repair specified in this AD.
Title 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: Aviation Programs, 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 promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.
This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.
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),
(3) Will not affect intrastate aviation in Alaska, and
(4) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
49 U.S.C. 106(g), 40113, 44701.
This AD is effective January 7, 2013.
(1) This AD applies to The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011.
(2) Installation of Supplemental Type Certificate (STC) ST01219SE (
Joint Aircraft System Component (JASC)/Air Transport Association (ATA) of America Code 53, Fuselage.
This AD was prompted by a report of a crack found in the fuselage skin under the aft drain mast. We are issuing this AD to detect and correct cracking in the fuselage skin and internal support structure, which could result in uncontrolled decompression of the airplane.
Comply with this AD within the compliance times specified, unless already done.
(1) For airplanes identified as Group 1 airplanes as specified in Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011: At the times specified in paragraph 1.E. “Compliance,” of Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011, do the actions specified in paragraphs (g)(1)(i), (g)(1)(ii), and (g)(1)(iii) of this AD, and do all related investigative actions and repair, as applicable, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011, except as required by paragraph (h) of this AD. Related investigative actions and repairs must be done before further flight. If the drain mast is found to be installed correctly, no further action is required by this paragraph.
(i) Do a detailed inspection for cracking and signs of corrosion of the channel and the fillers adjacent to the drain mast bolts.
(ii) Inspect the bonding strap for the correct location.
(iii) Measure the diameter and thickness of the washers under the drain mast bolts.
(2) For airplanes identified as Group 2 airplanes as specified in Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011: Within 120 days after the effective date of this AD, inspect and repair, as required, using a method approved in accordance with the procedures specified in paragraph (i) of this AD. Repairs must be done before further flight.
(1) Where Paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011, specifies a compliance time after the original issue date of Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011, this AD requires compliance within the specified compliance time after the effective date of this AD.
(2) For airplanes identified as Group 1 airplanes as specified in Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011: If any cracking or sign of corrosion is found during any inspection required by this AD, and Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011, specifies to contact Boeing for appropriate action, before further flight, repair the crack or sign of corrosion using a method approved in accordance with the procedures specified in paragraph (i) of this AD.
(1) The Manager, Seattle Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the ACO, send it to the attention of the person identified in the Related Information section of this AD. Information may be emailed to:
(2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office.
(3) An AMOC that provides an acceptable level of safety may be used for any repair required by this AD if it is approved by the Boeing Commercial Airplanes Organization Designation Authorization (ODA) that has been authorized by the Manager, Seattle ACO, to make those findings. For a repair method to be approved, the repair must meet the certification basis of the airplane, and the approval must specifically refer to this AD.
For more information about this AD, contact Wayne Lockett, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton, WA 98057-3356; phone: 425-917-6447; fax: 425-917-6590; email:
(1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise.
(i) Boeing Alert Service Bulletin 737-53A1318, dated October 31, 2011.
(3) For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207; telephone 206-544-5000, extension 1; fax 206-766-5680; Internet
(4) You may view this service information at FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425-227-1221.
(5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: