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Federal Register / Vol. 86, No. 184 / Monday, September 27, 2021 / Rules and Regulations COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 1600
Stewart Ave., Suite 410, Westbury, NY
11590; telephone 516 2287330; email andrea.jimenez@faa.gov.
SUPPLEMENTARY INFORMATION:
Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20190202, dated August 19, 2019 EASA AD 2019
0202, to correct an unsafe condition for PZL Swidnik S.A. Model PZL W3A
and PZL W3AS helicopters all manufacturer serial numbers. Model PZL W3AS helicopters are not certificated by the FAA and are not included on the U.S. type certificate data sheet; this AD therefore does not include those helicopters in the applicability.
EASA advises that an occurrence was reported where displaced teeth were detected on the moveable assemblies of an MR blade droop stop part number P/
N 37.21.800.00.00. This condition, if not addressed, could result in erroneous operation of MR blade droop stop teeth during engine start-up or shut-down, or dynamic drop-down of an MR blade, resulting in contact of the affected MR
blade with the tail boom, and possibly resulting in injury of occupants or persons on the ground.
Accordingly, EASA AD 20190202
requires removal of each affected part from any helicopter on which it is installed and prohibits installation of any affected MR blade droop stop or any moveable assembly of an affected MR
blade droop stop on any helicopter.

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FAAs Determination These helicopters have been approved by EASA and are approved for operation in the United States. Pursuant to the FAAs bilateral agreement with the European Union, EASA has notified the FAA about the unsafe condition described in its AD. The FAA is issuing this AD after evaluating all known relevant information and determining that the unsafe condition described previously is likely to exist or develop on other helicopters of the same type design.
Related Service Information Under 1
CFR Part 51
RNIA
The FAA reviewed WYTWO
SPRZETU KOMUNIKACYJNEGO PZLSwidnik Spo5ka Akcyjna Mandatory Bulletin No. BO3718302, Revision 1, dated July 11, 2019. This service information specifies procedures for removing the moveable assemblies of the MR blade droop stops. The service
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information specifies that the MR blade droop stop consists of four retaining washers that are installed on the MR
hub flapping hinges and four moveable MR blade droop stop assemblies installed on the retaining washers.
This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section.
Other Related Service Information The FAA also reviewed RNIA SPRZETU
WYTWO
KOMUNIKACYJNEGO PZL-Swidnik Spo5ka Akcyjna Mandatory Bulletin No.
BO3718302, dated June 19, 2019.
This service information also specifies procedures for removing the moveable assemblies of the MR blade droop stops but does not include the detailed effectivity and scope of compliance that RNIA SPRZETU
is included in WYTWO
KOMUNIKACYJNEGO PZL-Swidnik Spo5ka Akcyjna Mandatory Bulletin No.
BO3718302, Revision 1, dated July 11, 2019.
AD Requirements This AD requires accomplishing the actions specified in the service information already described.
Justification for Immediate Adoption and Determination of the Effective Date Section 553b3B of the Administrative Procedure Act APA 5
U.S.C. 551 et seq. authorizes agencies to dispense with notice and comment procedures for rules when the agency, for good cause, finds that those procedures are impracticable, unnecessary, or contrary to the public interest. Under this section, an agency, upon finding good cause, may issue a final rule without providing notice and seeking comment prior to issuance.
Further, section 553d of the APA
authorizes agencies to make rules effective in less than thirty days, upon a finding of good cause.
There are no helicopters with this type certificate on the U.S. Registry.
Accordingly, notice and opportunity for prior public comment are unnecessary, pursuant to 5 U.S.C. 553b3B. In addition, for the foregoing reason, the FAA finds that good cause exists pursuant to 5 U.S.C. 553d for making this amendment effective in less than 30
days.
Comments Invited The FAA invites you to send any written data, views, or arguments about this final rule. Send your comments to an address listed under ADDRESSES.
Include Docket No. FAA20210723;

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at the beginning of your comments. The most helpful comments reference a specific portion of the final rule, explain the reason for any recommended change, and include supporting data.
The FAA will consider all comments received by the closing date and may amend this final rule because of those comments.
Except for Confidential Business Information CBI as described in the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to https
www.regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this final rule.
Confidential Business Information CBI is commercial or financial information that is both customarily and actually treated as private by its owner.
Under the Freedom of Information Act FOIA 5 U.S.C. 552, CBI is exempt from public disclosure. If your comments responsive to this AD contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this AD, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as PROPIN. The FAA
will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this AD. Submissions containing CBI
should be sent to Andrea Jimenez, Aerospace Engineer, COS Program Management Section, Operational Safety Branch, Compliance &
Airworthiness Division, FAA, 1600
Stewart Ave., Suite 410, Westbury, NY
11590; telephone 516 2287330; email andrea.jimenez@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.
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 There are no costs of compliance with this AD because there are no helicopters
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