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Federal Register / Vol. 86, No. 44 / Tuesday, March 9, 2021 / Rules and Regulations
updating the helicopter records takes about 1 work-hour for each T/R blade, for an estimated cost of $170 per helicopter and $340 for the U.S fleet.
Replacing a T/R blade takes about 8
work-hours and parts cost about $29,110
for an estimated cost of $29,790 per T/
R blade.
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 responsibilities among the various levels of government.
For the reasons discussed above, I
certify that this AD:
1 Is not a significant regulatory action under Executive Order 12866, 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.

khammond on DSKJM1Z7X2PROD with RULES

List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:

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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:

20210419 Amendment 3921441; Docket No. FAA20200270; Product Identifier 2019SW018AD.
a Effective Date This airworthiness directive AD is effective April 13, 2021.
b Affected ADs None.
c Applicability This AD applies to Bell Textron Inc. Bell Model 205B helicopters, certificated in any category, with a tail rotor T/R blade part number P/N 212010750009, 212010
750105, 212010750109, 212010750
111, 212010750113, 212010750117, 212010750133, 212010750135, 212
010750117FM, or 212010750135FM
installed.
d Subject Joint Aircraft System Component JASC
Code: 6410, Tail Rotor Blades.
e Unsafe Condition This AD was prompted by flight testing and fatigue analysis that indicates that these part-numbered T/R blades sustain greater loads when used on Bell Model 205B
helicopters compared to their use on other model helicopters. The FAA is issuing this AD to prevent a T/R blade from remaining in service beyond its fatigue life, resulting in failure of the T/R blade and subsequent loss control of the helicopter.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 Before further flight:
i Determine the total hours time-inservice TIS of each T/R blade and remove from service each T/R blade that has accumulated 2,500 or more hours TIS. For each T/R blade that has accumulated less than 2,500 hours TIS, do the following:
ii Re-identify the P/N on the T/R blade data plate by vibro-etching to change the last three digits of the existing P/N as follows:
A For T/R blade P/N 212010750009, re-identify the P/N as 212010750111.
B For T/R blade P/N 212010750105, re-identify the P/N as 212010750109.
C For T/R blade P/N 212010750113, re-identify the P/N as 212010750117FM.
D For T/R blade P/N 212010750133, re-identify the P/N as 212010750135FM.
iii Create a component history card or equivalent record to reflect the change in P/

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N for each T/R blade, and establish a life limit of 2,500 hours TIS.
iv Revise the Airworthiness Limitations Section of the existing maintenance manual or the Instructions for Continued Airworthiness for your helicopter to establish a life limit of 2,500 hours TIS for each T/R
blade P/N 212010750109, P/N 212010
750111, P/N 212010750117, P/N 212
010750135, P/N 212010750117FM, and P/N 212010750135FM.
2 Thereafter, except as provided in paragraph i, no alternative life limits may be approved for T/R blade P/N 212010750
009, P/N 212010750105, P/N 212010
750113, or P/N 212010750133.
3 After the effective date of this AD, do not install a T/R blade P/N 212010750
009, P/N 212010750105, P/N 212010
750113, or P/N 212010750133 on any Model 205B helicopter unless the part number has been changed and the life limit reduced in accordance with this AD.
4 After the effective date of this AD do not install a T/R blade P/N 212010750
109, P/N 212010750111, P/N 212010
750117, P/N 212010750135, P/N 212
010750117FM, or P/N 212010750
135FM, on any Model 205B helicopter unless the life limit has been reduced in accordance with this AD.
h Special Flight Permit Special flight permits are prohibited.
i Alternative Methods of Compliance AMOCs 1 The Manager, DSCO 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 paragraph j1 of this AD.
Information may be emailed to: 9-ASW-190COS@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.
j Related Information 1 For more information about this AD, contact Kuethe Harmon, Safety Management Program Manager, DSCO Branch, FAA, 10101
Hillwood Pkwy., Fort Worth, TX 76177;
telephone 8172225198; email Kuethe.harmon@faa.gov.
2 For service information identified in this AD, contact Bell Textron Inc., P.O. Box 482, Fort Worth, TX 76101; telephone 817
2803391; fax 8172806466; or at https
www.bellcustomer.com. You may view service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101
Hillwood Pkwy., Room 6N321, Fort Worth, TX 76177.

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