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Federal Register / Vol. 86, No. 162 / Wednesday, August 25, 2021 / Proposed Rules 39 0823 622899; email: airworthiness@
tecnam.com; website: https
www.tecnam.com/us/support/. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call 816 3294148.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210700; 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 NPRM, the MCAI, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Jim Rutherford, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO
64106; phone: 816 3294165; fax: 816
3294090; email: jim.rutherford@
faa.gov.
SUPPLEMENTARY INFORMATION:

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Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under ADDRESSES. Include Docket No.
FAA20210700; Project Identifier 2019CE017AD at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, 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 proposal 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 NPRM.

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 NPRM, 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 NPRM. Submissions containing CBI
should be sent to Jim Rutherford, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO
64106. 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 European Union Aviation Safety Agency EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20190043, dated March 6, 2019
referred to after this as the MCAI, to correct an unsafe condition on Costruzioni Aeronautiche Tecnam S.P.A. Model P2006T airplanes. The MCAI states:
Failures of NLG piston tubes P/N 268
14081 were reported during ground operations. Subsequent investigation determined a deficiency in NLG piston tube manufacturing process. It was also determined that only a specific batch is affected by this defect.
This condition, if not corrected, could lead to failure of the NLG, possibly resulting in loss of control on the ground, during or after landing, with consequent damage to the aeroplane and injury to occupants.
To address this potential unsafe condition, TECNAM issued the service bulletin SB to provide instructions for the replacement of each affected part with a part that was manufactured by an improved process.
For the reasons described above, this EASA AD requires removal from service of the affected parts.

You may examine the MCAI in the AD docket at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0700.

Confidential Business Information
Related Service 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 NPRM

Costruzioni Aeronautiche Tecnam S.P.A. Service Bulletin No. SB 288CSEd 1, Revision 1, dated December 22, 2017, is related to this NPRM and provides information about installing nose landing gear NLG piston tube kit number SB 2881.

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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 this State of Design Authority, it has notified the FAA of the unsafe condition described in the MCAI and service information referenced above. The FAA is issuing this NPRM after determining the unsafe condition described previously is likely to exist or develop on other products of the same type design.
Proposed AD Requirements in This NPRM
This proposed AD would require replacing NLG piston tubes that are not P/N 26814081 and marked rev F00.
Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 59
airplanes of U.S. registry. The FAA also estimates that it would take about 4
work-hours per airplane to comply with the replacement required by this proposed AD. The average labor rate is $85 per work-hour. Required parts would cost about $1,200 per airplane.
Based on these figures, the FAA
estimates the cost of this proposed AD
on U.S. operators to be $90,860, or $1,540 per airplane.
The FAA has included all known costs in its cost estimate. According to the manufacturer, however, some of the costs of this proposed AD may be covered under warranty, thereby reducing the cost impact on affected operators.
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.

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