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Federal Register / Vol. 86, No. 54 / Tuesday, March 23, 2021 / Proposed Rules
15441

ESTIMATED COSTSContinued Cost per product
Action
Labor cost
Parts cost
Replacement of Piper Kit 764
393 Left and Piper Kit 764-394
Right.

20 work-hours $85 per hour =
$1,700.

$26,867 both kits

28,567

Cost on U.S.
operators 3,513,741

The wing carry through spar fitting, P/N 9771303, is included in the wing carry through spar assembly, P/N 7682402.
The replacement for the wing spar fitting P/N 9771200 and the replacement for spar assembly P/Ns 9770100 and 9770101 are included in Piper Kit 764393 and Piper Kit 764394.

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 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, 2 Would not affect intrastate aviation in Alaska to the extent that it justifies making a regulatory distinction, and 3 Would not have a significant economic impact, positive or negative, on a substantial number of small entities 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.

VerDate Sep<11>2014

17:08 Mar 22, 2021

Jkt 253001

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 790103, Amendment 393383 44 FR
36, January 2, 1979, Docket No. 78EA
69; and Airworthiness Directive 8320
03, Amendment 394739 48 FR 45535, October 6, 1983, Docket No. 83CE23
AD; and b. Adding the following new airworthiness directive:

Piper Aircraft, Inc.: Docket No. FAA2020
0881; Project Identifier 2018CE024
AD.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD action by May 7, 2021.
b Affected ADs This AD replaces AD 790103, Amendment 393383 44 FR 36, January 2, 1979, Docket No. 78EA69 AD 790103;
and AD 832003, Amendment 394739 48
FR 45535, October 6, 1983, Docket No. 83
CE23AD 832003.
c Applicability This AD applies to Piper Aircraft, Inc.
Models PA36285, PA36300, and PA36
375 airplanes, certificated in any category.
d Subject Joint Aircraft System Component JASC
Code 5700, Wings.
e Unsafe Condition This AD was prompted by a review of AD
832003 and AD 790103 and the determination that the requirements of those ADs did not address all of the affected airplanes. The FAA is issuing this AD to prevent fatigue damage to the wing structural components. The unsafe condition, if not addressed, could result in failure of the wing structure with consequent loss of control.

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f Compliance Comply with this AD within the compliance times specified, unless already done.
g Inspection of the Wing Spar Carry Through Assembly 1 For Models PA36285 and PA36300
airplanes, serial numbers 367360001
through 367560003, with a wing spar carry through assembly part number P/N 97370
00 installed, before the airplane accumulates a total of 2,000 hours time-in-service TIS or within 25 hours TIS after the effective date of this AD, whichever occurs later, and thereafter at intervals not to exceed 100 hours TIS, inspect the wing spar carry through assembly by following the Instructions, section 1, of Piper Aircraft, Inc., Service Bulletin No. 552A, dated August 3, 2018, Piper SB No. 552A.
2 If any damage is found during any inspection required by paragraph g1 of this AD, before further flight, repair or replace the wing spar carry through assembly by following the Instructions, section 2, of Piper SB No. 552A.
3 Replacing wing spar carry through assembly P/N 9737000 with wing spar carry through assembly P/N 7682402 terminates the repetitive inspections required by paragraph g1 of this AD.
h Life Limit Replacement of Wing Structural Components Remove from service the wing structural components specified in paragraphs h1
through 8 of this AD before the part accumulates the life limit hours TIS set forth in table 1 to paragraph h of this AD. If, on the effective date of this AD, the component will reach its life limit within 100 hours TIS
or has already reached its life limit, remove the part from service within 100 hours TIS
after the effective date of this AD.
1 Remove from service wing attachment upper bolt P/N 7724500 and replace with an unused zero hours TIS wing attachment upper bolt P/N 7724500.
2 Remove from service any wing carry through spar fitting P/Ns 9771300, 97713
02, or 9771303 and replace with an unused zero hours TIS wing carry through spar fitting P/N 9771303.
Note 1 to paragraph h2: Wing carry through spar fitting P/N 9771303 is included as part of spar carry through assembly P/N 7682402.
3 Remove from service wing spar fitting P/N 9771200 and replace with an unused zero hours TIS wing spar fitting P/N 97712
00 by following steps D1a through D1c
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