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Federal Register / Vol. 86, No. 157 / Wednesday, August 18, 2021 / Proposed Rules For the reasons described above, this EASA AD requires modification of the oil cooler air induction duct.

You may examine the MCAI in the AD docket at https
www.regulations.gov by searching for and locating Docket No. FAA2020
1069.
Although the unsafe condition statement in the MCAI identifies the cause as ice accumulation on the engine air induction fin, the FAA has determined that this does not accurately identify the affected air path. The affected area is the oil cooler air inlet duct fin.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Daher Aerospace Service Bulletin SB 70254, dated April 2018. The service information specifies procedures for removing the four upper fins of the oil cooler air induction duct and for re-identifying the oil cooler air induction duct with a new part number.
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.
Other Related Service Information The FAA also reviewed Daher Aerospace Service Bulletin SB 70231, Revision 1, dated July 2018; and Daher Aerospace Service Bulletin SB 70219, Revision 2, dated July 2018. The service information identifies the kit number and installation procedures for replacing the oil cooler air induction duct.

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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.

also estimates that it would take about 3 work-hours per product to comply with the requirements of this proposed AD. The average labor rate is $85 per work-hour. Required parts would cost about $50 per product.
Based on these figures, the FAA
estimates the total cost of the proposed AD on U.S. operators to be up to $246,135 at $305 per product.
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 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:
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.

Proposed AD Requirements in This NPRM
This AD requires accomplishing the actions specified in the service information already described.

List of Subjects in 14 CFR Part 39

Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect up to 807 products of U.S. registry. The FAA

Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

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Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Proposed Amendment
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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:

Daher Aerospace Type Certificate Previously Held by SOCATA: Docket No. FAA20201069; Project Identifier 2018CE039AD.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by October 4, 2021.
b Affected ADs None.
c Applicability This AD applies to Daher Aerospace type certificate previously held by SOCATA
Model TBM 700 airplanes, all serial numbers, certificated in any category, with an oil cooler air induction duct part number P/N
T700A7920040001, T700H792000900000, T700H792001900000, T700H792001900200, T700H792001900400, or T700H792001900600 installed.
Note 1 to paragraph c of this AD: The applicable oil cooler air induction duct P/Ns may be installed in accordance with modification 70043579; Daher Aerospace Service Bulletin SB 70231, Revision 1, dated July 2018; or Daher Aerospace Service Bulletin SB 70219, Revision 2, dated July 18, 2018.
d Subject Joint Aircraft System Component JASC
Code 7900, Engine Oil System Airframe.
e Unsafe Condition This AD was prompted by mandatory continuing airworthiness information MCAI
originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The unsafe condition that is the subject of the MCAI is ice accumulation on the oil cooler air inlet duct fin. The FAA is issuing this AD to prevent ice from accumulating on the oil cooler air induction duct fins, which could lead to an increase in oil temperature, uncommanded engine inflight shutdown, and reduced airplane control.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Modify the Oil Cooler Air Induction Duct 1 Within 3 months after the effective date of this AD, remove the four upper fins of the oil cooler air induction duct and re-identify the oil cooler air induction duct in accordance with the Description of Accomplishment Instructions in Daher Aerospace Service Bulletin SB 70254, dated April 2018.

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