Je veux savoir à propos de…

24553

Federal Register / Vol. 86, No. 87 / Friday, May 7, 2021 / Proposed Rules service information, a joint process improvement initiative was worked between the FAA and Boeing. The initiative resulted in the development of a new process in which the service information more clearly identifies the actions needed to address the unsafe condition in the Accomplishment Instructions. The new process results in a Boeing Requirements Bulletin,
Directive Implementation Aviation Rulemaking Committee AD ARC, to enhance the AD system. One enhancement is a process for annotating which steps in the service information are required for compliance RC with an AD. Boeing has implemented this RC
concept into Boeing service bulletins.
In an effort to further improve the quality of ADs and AD-related Boeing
which contains only the actions needed to address the unsafe condition i.e., only the RC actions.
Costs of Compliance The FAA estimates that this proposed AD affects 79 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Action
Labor cost
Repetitive inspections

14 work-hours $85 per hour = $1,190 per inspection cycle.

The FAA has received no definitive data on which to base the cost estimates for the on-condition repairs specified in this proposed AD.
Authority for This Rulemaking 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 The FAA determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would 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 this proposed regulation:
1 Is not a significant regulatory action under Executive Order 12866, 2 Would not affect intrastate aviation in Alaska, and 3 Would not have a significant economic impact, positive or negative, on a substantial number of small entities
VerDate Sep<11>2014

17:32 May 06, 2021

Jkt 253001

Parts cost
Cost per product $0

$1,190 per inspection cycle.

under the criteria of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 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:

The Boeing Company: Docket No. FAA
20210332; Project Identifier AD2020
01414T.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by June 21, 2021.
b Affected ADs None.
c Applicability This AD applies to The Boeing Company Model 7878 and 7879 airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin B787
81205SB53007500 RB, Issue 001, dated September 8, 2020.
d Subject Air Transport Association ATA of America Code 53, Fuselage.
e Unsafe Condition This AD was prompted by reports that shimming requirements were not met during the assembly of certain areas of the front spar
PO 00000

Frm 00041

Fmt 4702

Sfmt 4702

Cost on U.S. operators $94,010 per inspection cycle.

pickle fork and front spar outer chord structural joints, which can result in reduced fatigue thresholds of the affected structural joints. The FAA is issuing this AD to address undetected fatigue cracking, which could weaken primary structure so it cannot sustain limit load, and could result in reduced 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 Bulletins B78781205
SB53007500 RB and B78781205
SB53007600 RB, both Issue 001, both dated September 8, 2020, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletins B78781205
SB53007500 RB and B78781205
SB53007600 RB, both Issue 001, both dated September 8, 2020.
Note 1 to paragraph g: Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletins B78781205SB53007500 and B78781205SB53007600, both Issue 001, dated both September 8, 2020, which are referred to in Boeing Alert Requirements Bulletins B78781205SB53007500 RB and B78781205SB53007600 RB, both Issue 001, both dated September 8, 2020.
h Exceptions to Service Information Specifications 1 Where Boeing Alert Requirements Bulletin B78781205SB53007600 RB, Issue 001, dated September 8, 2020, uses the phrase the issue 001 date of the Requirements Bulletin B78781205
SB53007600 RB, this AD requires using the effective date of this AD.
2 Where Boeing Alert Requirements Bulletins B78781205SB53007500 RB and B78781205SB53007600 RB, both Issue 001, both dated September 8, 2020, specify contacting Boeing for repair instructions:
This AD requires doing the repair using a method approved in accordance with the
E:FRFM07MYP1.SGM

07MYP1