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Federal Register / Vol. 86, No. 225 / Friday, November 26, 2021 / Rules and Regulations
Since that EASA AD was issued, inservice occurrences of smoke and burning smell in the cockpit have been reported on F 406 aeroplanes. Technical investigations revealed that these were due to failure of CB
switches P/N CM358920, which are used to control the propeller de-icing circuit.
Prompted by these events, ASI Aviation issued the applicable SB as defined in this EASA AD to provide instructions to replace the affected parts with serviceable parts.
For the reasons described above, this EASA AD retains the requirements of EASA
AD 20060134, which is superseded, expands the range of affected parts, and requires replacement of P/N CM358920 CB
switches with improved design CB switches P/N 406E245000000100. This EASA AD
also replaces the previous life limit, 1 000
flight hours FH for certain P/N CM358950
CB switches, with a 6 year calendar time life limit, and also imposes that limit on the improved design CB switches.

You may examine the MCAI in the AD docket at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0714.
Discussion of Final Airworthiness Directive Comments The FAA received no comments on the NPRM or on the determination of the costs.

jspears on DSK121TN23PROD with RULES1

Related Service Information Under 1
CFR Part 51
The FAA reviewed ASI Aviation Service Bulletin No. F40662, Revision 01, dated December 14, 2018, which specifies inspecting the CB switches to determine the date code, replacing CB
switches with certain date codes, and establishing a life limit of 6 years for the new CB switches. The FAA also reviewed ASI Aviation Service Bulletin No. F40690, dated December 14, 2018, which specifies replacing the CB
switches and establishing a life limit of 6 years for the new CB switches. This service information is reasonably available because the interested parties have access to it through their normal
16:31 Nov 24, 2021

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Differences Between This AD and the MCAI
The MCAI allows installation of an affected CB switch until the airplane is modified. This AD prohibits installation of an affected CB switch as of the effective date of this AD.
Costs of Compliance The FAA estimates that this AD
affects 4 airplanes of U.S. registry.
The FAA also estimates that it would take about 5 work-hours per airplane to comply with the inspection required by this AD. The average labor rate is $85
per work-hour.
Based on these figures, the FAA
estimates the inspection cost of this AD
on U.S. operators to be $1,700 or $425
per airplane.
In addition, the FAA estimates that each replacement required by this AD
would take about 1 work-hour and require parts costing $350. Based on these figures, the FAA estimates the replacement cost of this AD on U.S.
operators to be $435 per airplane.
Authority for This Rulemaking
Conclusion 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 determined that air safety requires adopting this AD
as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these products. This AD is adopted as proposed in the NPRM.

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course of business or by the means identified in ADDRESSES.

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 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,
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2 Will not affect intrastate aviation in Alaska, and 3 Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.
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
DIRECTIVE
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:

20212221 ASI Aviation Type Certificate Previously Held by Reims Aviation S.A.: Amendment 3921794; Docket No.
FAA20210714; Project Identifier 2019CE016AD.
a Effective Date This airworthiness directive AD is effective January 3, 2022.
b Affected ADs None.
c Applicability This AD applies to ASI Aviation type certificate previously held by Reims Aviation S.A. Model F406 airplanes, all serial numbers, certificated in any category.
d Subject Joint Aircraft System Component JASC
Code 2400, Electrical Power System.
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 MCAI
describes the unsafe condition as failure of a circuit breaker CB switch. The FAA is issuing this AD to prevent smoke and burning smell in the cockpit caused by failure of CB switches. The unsafe condition, if not addressed, could result in reduced controllability of the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.

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