Federal Register - February 23, 2021
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Source: Federal Register
Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations
10779
ESTIMATED COSTS FOR REQUIRED ACTIONS: OPTION 1
Action
Labor cost
Internal general visual inspection
External general visual inspection
Internal Surface HFEC inspections
11 work-hours $85 per hour = $935
1 work-hour $85 per hour = $85
3 work-hours $85 per hour = $255
per inspection cycle.
Cost per product
Cost on U.S.
operators
$935
85
255 per inspection cycle.
$703,120.
63,920.
191,760 per inspection cycle.
Parts cost $0
0
0
ESTIMATED COSTS FOR REQUIRED ACTIONS: OPTION 2
Action
Labor cost
External general visual inspection
External LFEC and HFEC inspections
1 work-hour $85 per hour = $85
18 work-hours $85 per hour = $1,530
per inspection cycle.
Cost per product
Parts cost $0
0
$85
1,530 per inspection cycle.
Cost on U.S.
operators $63,920.
1,150,560 per inspection cycle.
The FAA has received no definitive data that would enable the agency to provide cost estimates for the oncondition actions specified in this AD.
under the criteria of the Regulatory Flexibility Act.
comply with the requirements of 14 CFR
39.17.
List of Subjects in 14 CFR Part 39
Authority for This Rulemaking
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
d Subject Air Transport Association ATA of America Code 53, Fuselage.
Title 49 of the United States Code specifies the FAAs 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 Agencys authority.
The FAA is 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.
Regulatory Findings 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 Will not affect intrastate aviation in Alaska, and 3 Will not have a significant economic impact, positive or negative, on a substantial number of small entities
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Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106g, 40113, 44701.
39.13
Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:
20210213 The Boeing Company:
Amendment 3921396; Docket No.
FAA20190705; Product Identifier 2019NM098AD.
a Effective Date This airworthiness directive AD is effective March 30, 2021.
b Affected ADs None.
c Applicability 1 This AD applies to The Boeing Company Model 737600, 700, 700C, 800, and 900 series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 73753A1383 RB, Revision 1, dated February 19, 2020.
2 Installation of Supplemental Type Certificate STC ST00830SE does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST00830SE is installed, a change in product alternative method of compliance AMOC approval request is not necessary to
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e Unsafe Condition This AD was prompted by reports of cracks in the bear strap from station STA 290 to STA 296, and between stringers S8R and S
9R, sometimes common to fasteners in the gap cover and emanating from rough sanding marks found on the surface of the bear strap.
The FAA is issuing this AD to address cracking of the bear strap, which could result in severing of the bear strap, possibly leading to uncontrolled decompression and loss of structural integrity of the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Except as specified by paragraph h of this AD: At the applicable times specified in the Compliance paragraph of Boeing Alert Requirements Bulletin 73753A1383 RB, Revision 1, dated February 19, 2020, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 73753A1383 RB, Revision 1, dated February 19, 2020.
Note 1 to paragraph g: Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 73753A1383, Revision 1, dated February 19, 2020, which is referred to in Boeing Alert Requirements Bulletin 737
53A1383 RB, Revision 1, dated February 19, 2020.
h Exceptions to Service Information Specifications 1 Where Boeing Alert Requirements Bulletin 73753A1383 RB, Revision 1, dated February 19, 2020, uses the phrase the original issue date of Requirements Bulletin 73753A1383 RB, this AD requires using the effective date of this AD, except where Boeing Alert Requirements Bulletin 737
53A1383 RB, Revision 1, dated February 19,
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