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Federal Register / Vol. 86, No. 28 / Friday, February 12, 2021 / Rules and Regulations CBI will be placed in the public docket for this rulemaking.
Regulatory Flexibility Act The requirements of the Regulatory Flexibility Act RFA do not apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt a rule without prior notice and comment. Because the FAA has determined that it has good cause to adopt this rule without prior notice and comment, RFA analysis is not required.
Costs of Compliance The FAA estimates that this AD
affects 17 helicopters of U.S. Registry.
Labor rates are estimated at $85 per work-hour. Based on these numbers, the FAA estimates the following costs to comply with this AD.
Inspecting the T/R blades for debonding takes about 0.75 work-hour for an estimated cost of $64 per helicopter and $1,088 for the U.S. fleet, per inspection cycle. Eddy current inspecting the T/R blades for a crack takes about 1.75 work-hours for an estimated cost of $149 per helicopter and $2,533 for the U.S. fleet, per inspection cycle.
If required, replacing a T/R blade takes about 4 work-hours and parts cost about $19,000, for an estimated cost of $19,340.
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 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
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responsibilities among the various levels of government.
For the reasons discussed, I certify that this AD:
1 Is not a significant regulatory action under Executive Order 12866, and 2 Will not affect intrastate aviation in Alaska.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
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:
a. Removing Airworthiness Directive 20201902, Amendment 3921243 85
FR 59416, September 22, 2020; and b. Adding the following new airworthiness directive:

20210404 Airbus Helicopters:
Amendment 3921425; Docket No.
FAA20210027; Project Identifier MCAI202100048R.
a Effective Date This airworthiness directive AD is effective March 1, 2021.
b Affected ADs This AD replaces AD 20201902, Amendment 3921243 85 FR 59416, September 22, 2020 AD 20201902.
c Applicability This AD applies to Airbus Helicopters Model SA330J helicopters, certificated in any category, with a tail rotor T/R blade part number P/N 330A120005all dash numbers without a de-icing system or 330A120006all dash numbers with a deicing system, installed.
d Subject Joint Aircraft Service Component JASC
Code: 6410, Tail Rotor Blades.
e Unsafe Condition This AD was prompted by two reports of cracked metal T/R blade skin. The FAA is issuing this AD to address fatigue cracking of a T/R blade. The unsafe condition, if not addressed, could result in failure of a T/R
blade and subsequent loss of control of the helicopter.

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f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 For T/R blade P/N 330A120006all dash numbers with a de-icing system, within 15 hours time-in-service TIS after the effective date of this AD or within 15
hours TIS after last inspecting the T/R blade as required by paragraph f1 of AD 2020
1902, whichever occurs first, and thereafter at intervals not to exceed 15 hours TIS; and for T/R blade P/N 330A120005all dash numbers without a de-icing system, within 30 hours TIS after the effective date of this AD, or within 30 hours TIS after last inspecting the T/R blade as required by paragraph f1 of AD 20201902, whichever occurs first, and thereafter at intervals not to exceed 30 hours TIS:
i Inspect each T/R blade for debonding by following the visual and in-depth inspection procedures in the Accomplishment Instructions, paragraph 3.B.2., of Airbus Helicopters Emergency Alert Service Bulletin No. 05.101, Revision 0, dated March 21, 2016
EASB 05.101. If there is debonding within allowable limits, before further flight, repair or replace the T/R blade. If there is debonding that exceeds allowable limits, before further flight, replace the T/R blade.
ii Eddy current inspect each T/R blade for a crack by following the Accomplishment Instructions, paragraph 3.B.3.a. of EASB
05.101, then either paragraph 3.B.3.b.1. or 3.B.3.b.2. of EASB 05.101 depending on your crack detector, and paragraph 3.B.3.c. of EASB 05.101 except the if there are no cracks and if there are one or several cracks steps. Instead of the if there are no cracks and if there are one or several cracks steps, if there is a crack, before further flight, replace the T/R blade.
2 As of the effective date of this AD, do not install a T/R blade identified in paragraph c of this AD on any helicopter unless the actions of paragraphs g1i and ii of this AD have been accomplished.
h Alternative Methods of Compliance AMOCs 1 The Manager, Strategic Policy Rotorcraft Section, 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 paragraph i1 of this AD.
Information may be emailed to: 9-ASW-FTWAMOC-Requests@faa.gov.
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.
i Related Information 1 For more information about this AD, contact Matt Fuller, AD Program Manager, General Aviation & Rotorcraft Unit,
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