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Federal Register / Vol. 86, No. 241 / Monday, December 20, 2021 / Rules and Regulations
an agency finds good cause pursuant to 5 U.S.C. 553 to adopt a rule without prior notice and comment. Because 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 74 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.
Removing and reinstalling both LCTAs on each helicopter will take about 4 work-hours, with no parts costs, for an estimated cost of about $340 per helicopter or $25,160 for the U.S. fleet.
Overhauling both LCTAs on each helicopter will take about 56 workhours, and parts costs will be about $200, for an estimated cost of about $4,960 per overhaul.
Reporting information to the FAA will take about 1 work hour per helicopter, for an estimated cost of about $85 per report.

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Paperwork Reduction Act A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a currently valid OMB Control Number. The OMB
Control Number for this information collection is 21200056. Public reporting for this collection of information is estimated to be approximately 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information.
All responses to this collection of information are mandatory. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to:
Information Collection Clearance Officer, Federal Aviation Administration, 10101 Hillwood Parkway, Fort Worth, TX 761771524.
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.

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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, 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.
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 adding the following new airworthiness directive:

20212306 Various Model 234 and Model CH47D Helicopters: Amendment 39
21804; Docket No. FAA20210951;
Project Identifier AD202101047R.
a Effective Date This airworthiness directive AD is effective January 4, 2022.
b Affected ADs None.
c Applicability This AD applies to Model 234 and Model CH47D helicopters, regardless of type
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certificate holder, certificated in any category. Type certificate holders include, but are not limited to:
1 Columbia Helicopters, Inc., 2 Billings Flying Service, Inc., 3 Tandem Rotor, LLC, and 4 Unical Aviation, Inc.
d Subject Joint Aircraft System Component JASC
Code/Air Transport Association ATA of America Code: 6710, Rotor flight controls.
e Unsafe Condition This AD was prompted by inadequate maintenance, which resulted in mechanical failure of the longitudinal cyclic trim actuator LCTA. The FAA is issuing this AD
to correct this unsafe condition, which if not addressed, could result in loss of control of the rotor blades and subsequent loss of control of the helicopter or the rotor blades striking the fuselage.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 Within 3 calendar days after the effective date of this AD, determine the hours time-in-service TIS and lift cycles since last overhaul for each LCTA on your helicopter.
If lift cycles cannot be determined, count 6
lift cycles for each hour TIS for each LCTA.
For purposes of this AD, a lift cycle is defined as any of the following:
i Takeoff from ground for flight;
ii Lift of a new external load while in flight; or iii Lift of a new internal load while in flight e.g., fluid drawn into an internal tank.
2 If the last overhaul of any LCTA was not approved for return to service by a person that meets the requirements of 14 CFR part 43, or, if you are unable to establish hours TIS and lift cycles since last overhaul of an LCTA e.g., hours TIS and lift cycles for each LCTA were not tracked, within 10 calendar days after the effective date of this AD, and thereafter at intervals not to exceed 3,000
hours TIS or 18,000 lift cycles, whichever occurs first, overhaul that LCTA. For purposes of any overhaul required by this AD, the overhaul must include:
i An inspection of each acme screw for wear and cracking;
ii Lubricating all drive threads and gears;
and iii A test to ensure proper operation of the extend and retract travel limit switches.
3 If the last overhaul of an LCTA was approved for return to service by a person that meets the requirements of 14 CFR part 43, overhaul the LCTA to include the overhaul requirements specified in paragraphs g2i through iii of this AD
within 500 hours TIS or 3,000 lift cycles since last overhaul, whichever occurs first; or within 90 days after the effective date of this AD, whichever occurs later. Thereafter, overhaul each LCTA at intervals not to exceed 3,000 hours TIS or 18,000 lift cycles, whichever occurs first.
4 As of the effective date of this AD, do not install any LCTA on any helicopter
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