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Federal Register / Vol. 86, No. 103 / Tuesday, June 1, 2021 / Rules and Regulations
and locating Docket No. FAA2021
0104; 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, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Hal Jensen, Aerospace Engineer, Operational Safety Branch, FAA, 950 LEnfant Plaza SW, Washington, DC 20024; telephone 2022679167; email hal.jensen@
faa.gov.
SUPPLEMENTARY INFORMATION:

Background The EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20200084, dated April 3, 2020 EASA
AD 20200084 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for all Airbus Helicopters Deutschland GmbH Model MBBBK117 D2 helicopters. Although EASA AD 20200084 applies to all Model MBBBK117 D2 helicopters, this AD applies to helicopters with an affected part installed instead.
The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to certain Model MBBBK117 D
2 helicopters. The NPRM published in
the Federal Register on March 8, 2021
86 FR 13234. The NPRM was prompted by reports that collective lever switch units having certain part numbers did not have retaining rings installed in the cable cut switch guard.
The NPRM proposed to require inspecting certain collective lever switch units for discrepancies missing retaining rings, incorrectly installed retaining rings, and a missing axis in the cable cut switch guard, doing all applicable corrective actions, and marking affected parts.
The cable cut switch guard has an axis that holds, and allows the guard to turn over, the cable cut switch. This axis is secured with two retaining rings and if both retaining rings are missing, the axis can move out. The FAA is issuing this AD to address this condition, which could cause inadvertent activation of the rescue hoist cable cut function, resulting in personal injury. See the MCAI for additional background information.
Discussion of Final Airworthiness Directive Comments The FAA gave the public the opportunity to participate in developing this final rule. The FAA received no comments on the NPRM or on the determination of the cost to the public.
Conclusion The FAA reviewed the relevant data and determined that air safety and the public interest require adopting this final rule as proposed, except for minor
editorial changes and an update to paragraph j1 of this AD. The FAA has determined that these minor changes:
Are consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and Do not add any additional burden upon the public than was already proposed in the NPRM.
Related Service Information Under 1
CFR Part 51
EASA AD 20200084 specifies procedures for inspecting collective lever switch units having certain part numbers for discrepancies, applicable corrective actions, and marking affected parts. Discrepancies include missing retaining rings, incorrectly installed retaining rings, and a missing axis in the cable cut switch guard. Corrective actions include installing missing retaining rings, adjusting retaining rings that are installed incorrectly, and installing an axis in the cable cut switch guard. EASA AD 20200084 also specifies that an affected part can be installed on any helicopter, provided it has been marked. This material 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.
Costs of Compliance The FAA estimates that this AD
affects 30 helicopters of U.S. registry.
The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
0.50 work-hour $85 per hour = $42.50

$0

$42.50

$1,275

The FAA estimates the following costs to do any necessary on-condition actions that would be required based on
the results of any required actions. The FAA has no way of determining the
number of helicopters that might need these on-condition actions:

jbell on DSKJLSW7X2PROD with RULES

ESTIMATED COSTS OF ON-CONDITION ACTIONS
Labor cost
Parts cost
Cost per product
2 work-hours $85 per hour = $170

$56

$226

According to the manufacturer, some or all of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected operators. The FAA does not control warranty coverage for affected operators.

VerDate Sep<11>2014

16:41 May 28, 2021

Jkt 253001

As a result, the FAA has included all known costs in the cost estimate.
Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs authority to issue rules on aviation safety. Subtitle I,
PO 00000

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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
E:FRFM01JNR1.SGM

01JNR1