Je veux savoir à propos de…

Federal Register / Vol. 86, No. 36 / Thursday, February 25, 2021 / Proposed Rules 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 that the 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 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:

VerDate Sep<11>2014

16:43 Feb 24, 2021

Jkt 253001

a. Removing Airworthiness Directive 20201207, Amendment 3921142 85
FR 36145, June 15, 2020; and b. Adding the following new airworthiness directive:

Hamilton Sundstrand Corporation: Docket No. FAA20210032; Project Identifier AD202001314P.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD action by April 12, 2021.
b Affected ADs This AD replaces AD 20201207, Amendment 3921142 85 FR 36145, June 15, 2020.
c Applicability This AD applies to all Hamilton Sundstrand Corporation Hamilton Sundstrand 54H model propellers with a propeller hub, model 54H60, installed.
Note to paragraph c: Hamilton Sundstrand references propeller model 54H60 in Hamilton Sundstrand Alert Service Bulletin ASB 54H6061A154, Revision 1, dated May 29, 2020. These are model 54H
propellers with a 54H60 model propeller hub.
d Subject Joint Aircraft System Component JASC
Code 6111, Propeller Blade Section.
e Unsafe Condition This AD was prompted by the separation of a propeller blade that resulted in the loss of an airplane and 17 fatalities. The FAA is issuing this AD to detect cracking in the propeller blade taper bore. The unsafe condition, if not addressed, could result in failure of the propeller blade, blade separation, and loss of the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 For propellers with an installed propeller blade having a blade serial number S/N below 813320, that has not been overhauled within the past sixty 60 months, within one year or 500 flight hours FHs after July 20, 2020 the effective date of AD
20201207, whichever occurs first, perform an eddy current inspection ECI of all blades installed on the propeller.
2 For propellers with an installed propeller blade having a blade S/N below 813320, that has been overhauled within the past sixty 60 months, within two years or 1,000 FHs after July 20, 2020 the effective date of AD 20201207, whichever occurs first, perform an ECI of all blades installed on the propeller.
3 For propellers with an installed propeller blade, blade S/N 813320 and above, that has not been overhauled within ten years since new or since last overhaul, within one year or 500 FHs after the effective date of this AD, whichever occurs first, perform an ECI
of all blades installed on the propeller.

PO 00000

Frm 00003

Fmt 4702

Sfmt 4702

11475

4 Perform the ECI of the propeller blades required by paragraphs g1 through 3 of this AD in accordance with the Accomplishment Instructions, paragraph 3.C.5, of both Hamilton Sundstrand ASB
54H6061A154, Revision 1, dated May 29, 2020, and of Hamilton Sundstrand ASB
54H6061A155, dated May 29, 2020.
5 For all propellers identified in paragraphs g1 through 3 of this AD, repeat the inspection required by paragraphs g1 through 4 of this AD at intervals not exceeding 3 years or 1,500 FHs, whichever comes first, from the previous inspection.
6 If a propeller blade fails any inspection required by this AD, based on the criteria in Accomplishment Instructions, paragraph 3.C.5g of Hamilton Sundstrand ASB
54H6061A154, Revision 1, dated May 29, 2020, and paragraph 3.C.5j of Hamilton Sundstrand ASB 54H6061A155, dated May 29, 2020, remove the blade from service before further flight and replace with a blade eligible for installation.
7 Report the results of the ECI required by paragraphs g1 through 5 of this AD in accordance with the Accomplishment Instructions, paragraph 3.C.6, of Hamilton Sundstrand ASB 54H6061A154, Revision 1, dated May 29, 2020.
h Installation Prohibition 1 After the effective date of this AD, do not install onto any propeller a Hamilton Sundstrand propeller blade identified in paragraphs g1 through 4 of this AD, unless the blade has first passed the initial inspection required by paragraphs g1
through 4 of this AD.
2 After the effective date of this AD, do not install any propeller assembly with a propeller blade identified in paragraphs g1
through 4 of this AD onto any aircraft unless the propeller blades have passed the initial inspection required by paragraphs g1 through 4 of this AD.
i Credit for Previous Actions You may take credit for the initial ECI of a propeller blade required by paragraphs g1 and 2 of this AD and the replacement of a propeller blade required by paragraph g6 of this AD if the actions were completed before the effective date of this AD
using Hamilton Sundstrand ASB 54H6061
A154, dated August 26, 2019.
j Alternative Methods of Compliance AMOCs 1 The Manager, Boston ACO Branch, 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 certification office, send it to the attention of the person identified in Related Information.
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.

E:FRFM25FEP1.SGM

25FEP1