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Federal Register / Vol. 86, No. 12 / Thursday, January 21, 2021 / Proposed Rules 900ER series airplanes with certain line numbers. However, the applicability of this proposed AD includes all Boeing Model 737600, 700, 700C, 800, 900, and 900ER series airplanes and Model 7378 and 7379 airplanes.
Because the affected captains and first officers rudder pedal cover and shroud assemblies are rotable parts, the FAA
has determined that these parts could later be installed on airplanes that were
initially delivered with acceptable rudder pedal cover and shroud assemblies, thereby subjecting those airplanes to the unsafe condition. The agency has confirmed with Boeing that the Accomplishment Instructions in Boeing Alert Requirements Bulletin 73727A1313 RB, Revision 1, dated June 24, 2020, and Boeing Alert Requirements Bulletin 73727A1314
RB, Revision 1, dated June 24, 2020, are
applicable to the expanded group of airplanes.
Costs of Compliance The FAA estimates that this proposed AD affects 2,048 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Up to 13 work-hours $85 per hour = Up to $1,105

$5,560

Up to $6,665

Action Modifying rudder pedal shroud assemblies.

The FAA has included all costs in its cost estimate. According to the manufacturer, however, some or all of the costs of this proposed AD may be covered under warranty, thereby reducing the cost impact on affected operators.

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 under the criteria of the Regulatory Flexibility Act.

Authority for This Rulemaking
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

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.

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Regulatory Findings The FAA has 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 that the proposed regulation:
1 Is not a significant regulatory action under Executive Order 12866,
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15:58 Jan 19, 2021

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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:
a. Removing Airworthiness Directive 20171413, Amendment 3918957 82
FR 33007, July 19, 2017, and b. Adding the following new airworthiness directive:

The Boeing Company: Docket No. FAA
20201140; Project Identifier AD2020
01009T.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD action by March 8, 2021.
b Affected ADs This AD replaces AD 20171413, Amendment 3918957 82 FR 33007, July 19, 2017 AD 20171413.
c Applicability This AD applies to all The Boeing Company airplanes specified in paragraphs c1 and 2 of this AD, certificated in any category.

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Cost on U.S.
operators Up to $13,649,920.

1 Model 737600, 700, 700C, 800, 900, and 900ER series airplanes.
2 Model 7378 and 7379 airplanes.
d Subject Air Transport Association ATA of America Code 27, Flight controls.
e Unsafe Condition This AD was prompted by a report of an aborted takeoff because the rudder pedals were not operating correctly, and by additional reports of loose rudder pedal cover fasteners on previously inspected airplanes and on additional airplanes that were not included in the applicability of AD
20171413. The FAA is issuing this AD to address incorrectly installed cover assembly fasteners from interfering with the operation of a rudder pedal. An incorrectly installed fastener could restrict rudder pedal motion and reduce differential braking control during takeoff or landing, which could cause a high-speed runway excursion.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Determination of Modification Status For airplanes with an original airworthiness certificate or original export certificate of airworthiness issued before the effective date of this AD: Within 27 months after the date of issuance of the original airworthiness certificate or original export certificate of airworthiness, or within 27
months after the effective date of this AD, whichever occurs later, determine whether the captains and first officers rudder pedal cover and shroud assemblies have been modified as specified in Boeing Alert Requirements Bulletin 73727A1313 RB, Revision 1, dated June 24, 2020, or 737
27A1314 RB, Revision 1, dated June 24, 2020, as applicable, or by production equivalent. A
review of airplane maintenance records is acceptable for this requirement if the modification status can be conclusively determined from that review.
h Modification For airplanes that have not been modified as determined by paragraph g of this AD: At
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