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Federal Register / Vol. 86, No. 164 / Friday, August 27, 2021 / Proposed Rules placed in the public docket of this NPRM. Submissions containing CBI
should be sent to Haytham Alaidy, Aerospace Engineer, Certification &
Program Management Section, DSCO
Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone 817
2225224; email haytham.alaidy@
faa.gov. Any commentary that the FAA
receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking.
Background The FAA proposes to adopt a new AD
for Bell Textron Inc., Model 412, 412EP, and 412CF helicopters. This proposed AD was prompted by the results of an evaluation of BLR Aerospace Strake and FastFin system part number P/N 412
705040101. During the evaluation, additional flight loads were recorded that impact the collective lever fatigue life. Accordingly, this proposed AD
would require adding a permanent life penalty for affected collective levers and prohibit installing those collective levers unless the permanent life penalty has been added. This condition, if not addressed, could result in fatigue damage and cracking, failure of the collective lever, and subsequent loss of control of the helicopter.
FAAs Determination The FAA is issuing this NPRM after determining that the unsafe condition described previously is likely to exist or develop on other products of the same type design.
Related Service Information The FAA reviewed Bell Helicopter Alert Service Bulletin 41212151, Revision A, dated July 8, 2014. This service information specifies procedures for adding a permanent flight hour penalty for collective levers installed or previously installed on helicopters with a Strake and FastFin system P/N 412
705040101.

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Proposed AD Requirements in This NPRM

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The service information specifies adding the permanent life penalty at the next scheduled inspection, whereas this proposed AD would require that action within 50 hours TIS after the effective date of this AD instead. This proposed AD would require adding the permanent life penalty for helicopters without a Strake and FastFin system P/N 412
705040101 installed, but with a collective lever P/N 412010408101
installed, whereas the service information does not specify this.
Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 96
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 proposed AD.
Replacing a collective lever would take about 2 work-hours and parts would cost about $18,237, for an estimated cost of $18,407 per helicopter and up to $1,767,072 for the U.S. fleet.
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 proposed AD would require, depending on the configuration, adding a permanent life penalty of 5,000 hours time-in-service TIS or 50% of the total hours TIS accumulated by the collective lever on the component history card or equivalent record for the collective lever. This proposed AD would also prohibit installing an affected collective lever unless the permanent life penalty has been added on its component history card or equivalent record.

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Differences Between This Proposed AD
and the Service Information
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 this proposed regulation:

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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 adding the following new airworthiness directive:

Bell Textron Inc.: Docket No. FAA2021
0713; Project Identifier AD202100180
R.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by October 12, 2021.
b Affected ADs None.
c Applicability This AD applies to Bell Textron Inc., Model 412, 412EP, and 412CF helicopters, certificated in any category.
d Subject Joint Aircraft System Component JASC
Code: 2700, Flight Control System.
e Unsafe Condition This AD was prompted by evaluation results showing flight loads that impact the collective lever fatigue life. The FAA is issuing this AD to prevent fatigue damage and cracking, which could result in failure of the collective lever and subsequent loss of control of the helicopter.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 Within 50 hours time-in-service TIS
after the effective date of this AD:
i For helicopters with a Strake and FastFin system part number P/N 412705
040101 installed since initial delivery from the manufacturer, add a permanent penalty
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