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Federal Register / Vol. 86, No. 171 / Wednesday, September 8, 2021 / Rules and Regulations
the initiating event may be the activation of the engine chip detector.
Accordingly, Canadian AD CF2017
36 requires replacing relay panel assembly P/N SLS075002107 with relay panel assembly P/N SLS075
002109.
Discussion of Final Airworthiness Directive Comments The FAA received no comments on the NPRM or on the determination of the costs.
Conclusion These helicopters have been approved by the aviation authority of Canada and are approved for operation in the United States. Pursuant to the FAAs bilateral agreement with Canada, Transport Canada, its technical representative, has notified the FAA of the unsafe condition described in its AD. The FAA reviewed the relevant data and determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these helicopters. Except for minor editorial changes and updating the email and website addresses for Bell Textron Canada Limited throughout this document, this AD is adopted as proposed in the NPRM.

jbell on DSKJLSW7X2PROD with RULES

Related Service Information Under 1
CFR Part 51
The FAA reviewed Bell Helicopter Alert Service Bulletin 5051704, dated December 6, 2017 ASB 5051704.
ASB 5051704 specifies procedures for replacing relay panel assembly P/N
SLS075002107 with relay panel assembly P/N SLS075002109. ASB
5051704 also specifies procedures for accomplishing a functional test of the two engine electrical magnetic plugs and provides a notice to ensure 505
FM1 TR2 is inserted into the flight manual.
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.
Differences Between This AD and the Transport Canada AD
Canadian AD CF201736 requires replacing the relay panel assembly within 25 hours air time or 30 days, whichever occurs first, whereas this AD
requires that replacement within 25
hours time-in-service instead. Canadian AD CF201736 applies to certain serial-numbered Model 505 helicopters, whereas this AD applies to certain serial-numbered Model 505 helicopters
VerDate Sep<11>2014

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with relay panel assembly P/N SLS
075002107 installed instead.
Costs of Compliance The FAA estimates that this AD
affects 3 helicopters of U.S. Registry.
The FAA estimates that operators may incur the following costs in order to comply with this AD. Labor costs are estimated at $85 per work-hour.
Replacing each relay panel assembly takes about 3 work-hours and parts cost $7,079 for an estimated cost of $7,334
per helicopter and $22,002 for the U.S.
fleet.
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 helicopters 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, 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.

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The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
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:

20211612 Bell Textron Canada Limited:
Amendment 3921674; Docket No.
FAA20210377; Project Identifier MCAI202100380R.
a Effective Date This airworthiness directive AD is effective October 13, 2021.
b Affected ADs None.
c Applicability This AD applies to Bell Textron Canada Limited Model 505 helicopters, certificated in any category, with serial numbers S/Ns 65011 through 65023 inclusive, 65025
through 65028 inclusive, 65030 through 65032 inclusive, 65034, and 65036 with relay panel assembly part number P/N SLS075
002107 installed.
Note 1 to paragraph c: Helicopters with S/Ns 65011 through 65023 inclusive, 65025
through 65028 inclusive, 65030 through 65032 inclusive, 65034, and 65036 are known to have had relay panel assembly P/
N SLS075002107 installed during production.
d Subject Joint Aircraft Service Component JASC
Code: 3110, Instrument Panel.
e Unsafe Condition This AD was prompted by three occurrences of metallic debris in the engine oil lubrication system causing a short to ground within the engine chip detector. The FAA is issuing this AD to prevent failure of the 12 volts direct current VDC reference voltage, loss of display of important flight information to the pilot including the main rotor rotations per minute Nr, fuel quantity, and transmission oil pressure and temperature, and the generator voltage and ammeter parameters as marked invalid with a red X on the primary flight display PFD
and the multi-function display MFD. The unsafe condition, if not addressed, could result in simultaneous loss of caution, advisory, and system performance indicators for multiple systems.
f Compliance Comply with this AD within the compliance times specified, unless already done.

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