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Federal Register / Vol. 86, No. 107 / Monday, June 7, 2021 / Rules and Regulations p.m., Monday through Friday, except Federal holidays.
For service information identified in this final rule, contact Leonardo S.p.A.
Helicopters, Emanuele Bufano, Head of Airworthiness, Viale G.Agusta 520, 21017 C.Costa di Samarate Va Italy;
telephone +390331225074; fax +39
0331229046; or at https
www.leonardocompany.com/en/home.
You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101
Hillwood Pkwy., Room 6N321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 817 2225110. It is also available at https www.regulations.gov by searching for and locating Docket No.
FAA20210378.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210378; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the European Aviation Safety Agency now European Union Aviation Safety Agency EASA AD, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Anthony Kenward, Aerospace Engineer, AIR7F1, Fort Worth ACO Branch, FAA, 10101 Hillwood Parkway, Fort Worth, TX 78101; telephone 817 222
5152; email Anthony.Kenward@faa.gov.
SUPPLEMENTARY INFORMATION:

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Background The EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20170164, dated September 4, 2017
EASA AD 20170164, to correct an unsafe condition for certain Leonardo S.p.a. Model AW169 helicopters. The EASA advises that there were reports of failed NLG retraction actuators during the acceptance test procedures on the ground on the final assembly line. The EASA stated the NLG got stuck at approximately a 45 angle half of the full stroke regardless of the selected extension mode normal or emergency.
Investigation revealed that excessive friction inside the NLG retraction actuator caused internal damage, resulting in mechanical jam of the actuator rotary shaft. The EASA advised that due to similarity of design, the same failure mode can affect the MLG
retraction actuators. This condition, if not addressed, could result in a partially
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locked or unlocked NLG or MLG upon landing, possibly resulting in damage to the helicopter and injury to the occupants.
Accordingly, the EASA AD requires, depending on the helicopter configuration, various modifications, installation checks, inspections of the plungers of the NLG and MLG up down lock actuators, and corrective actions if necessary.
FAAs Determination This product has been approved by the aviation authority of another country and is approved for operation in the United States. Pursuant to the FAAs bilateral agreement with the State of Design Authority, the FAA has been notified of the unsafe condition described in the MCAI referenced above. The FAA is issuing this AD after evaluating all pertinent information and determining that the unsafe condition exists and is likely to exist or develop on other products of the same type design.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Leonardo Helicopters Alert Service Bulletin 169
023, Revision B, dated April 16, 2018
ASB 169023, Revision B. This service information specifies procedures for, depending on the helicopter configuration, various modifications, installation checks which include measurements, inspections of the plungers of the NLG and MLG up down lock actuators, and corrective actions if necessary. The modifications include replacing the actuators, installing enhanced landing gear retracting actuators, modifying the landing gear actuator control box, improving the landing gear proximity switch, and doing checks and measurements.
Corrective actions include replacing the NLG and MLG lock support buffer, reinstalling the NLG and MLG retracting electrical actuator, shimming gaps, adjusting the position of the NLG
retracting lever, applying lubricant, installing a pin, replacing washers, and reinstalling the NLG assembly.
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.
AD Requirements This AD requires accomplishing the actions specified in the service information already described, except as discussed under Differences Between this AD and the MCAI.

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Differences Between This AD and the MCAI
EASA AD 20170164 requires modifications and installation checks within 200 hours time-in-service TIS
or 6 months, whichever occurs first; this AD requires those actions within 200
hours TIS.
EASA AD 20170164 requires, for certain helicopters, an inspection of the plungers of the NLG and MLG up down lock actuators within 50 hours TIS or 30
days, whichever occurs first; this AD
requires that action within 30 days.
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 is one helicopter with this type certificate on the U.S. Register. The FAA
has confirmed that the identified unsafe condition has been addressed on that helicopter. Accordingly, notice and opportunity for prior public comment are unnecessary, pursuant to 5 U.S.C.
553b3B.
In addition, for the foregoing reasons, 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. FAA20210378;
Project Identifier 2017SW122AD 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
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