Voglio sapere a riguardo di…

41792

Federal Register / Vol. 86, No. 146 / Tuesday, August 3, 2021 / Proposed Rules
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 Jacob Fitch, Aerospace Engineer, COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; phone: 817 222
4130; email: jacob.fitch@faa.gov. Any commentary that the FAA receives that is not specifically designated as CBI will be placed in the public docket for this rulemaking.
Background The FAA issued AD 20190506, Amendment 3919588 84 FR 8961, March 13, 2019 AD 20190506, which applies to Airbus Helicopters Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters.
AD 20190506 requires replacing the retaining ring, inspecting the hoist cable hook assembly, and, if necessary, replacing the elastomeric energy absorber. The FAA issued AD 201905
06 to address detachment of a hook assembly from an external mounted hoist cable resulting in in-flight failure of the hoist assembly, which could result in injury to persons being lifted.

jbell on DSKJLSW7X2PROD with PROPOSALS

Actions Since AD 20190506 Was Issued Since the FAA issued AD 201905
06, the DAH has designed an updated hook assembly, which, when installed terminates the repetitive inspections required by AD 20190506.
The EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20210011, dated January 12, 2021
EASA AD 20210011 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for Airbus Helicopters Deutschland GmbH AHD formerly Eurocopter Deutschland GmbH, Eurocopter Espana S.A. Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, EC135T3, EC635P2+, EC635P3, EC635T1, EC635T2+ and EC635T3 helicopters, all serial numbers up to 1276 inclusive.

VerDate Sep<11>2014

16:59 Aug 02, 2021

Jkt 253001

Model EC635P2+, EC635P3, EC635T1, EC635T2+, and EC635T3 helicopters are not certificated by the FAA and are not included on the U.S. type certificate data sheet except where the U.S. type certificate data sheet explains that the Model EC635T2+ helicopter having serial number 0858 was converted from Model EC635T2+ to Model EC135T2+;
this proposed AD therefore does not include those helicopters in the applicability.
This proposed AD was prompted by a report that a hook detached from the hoist cable. The FAA is proposing this AD to address detachment of a hook from a hoist cable resulting in in-flight failure of the hoist, which could result in injury to persons being lifted. See the MCAI for additional background information.

information and determining the unsafe condition described previously is likely to exist or develop in other products of these same type designs.

Related Service Information Under 1
CFR Part 51
EASA AD 20210011 specifies procedures for replacing the retaining ring; inspecting the hoist cable hook assembly; replacing the elastomeric energy absorber; and modifying the hoist cable hook assembly or replacing an affected hoist with a serviceable hoist, which terminates the repetitive inspections and replacements.
This proposed AD also requires Goodrich Service Bulletin No. 44301
1017, Revision 4, dated July 26, 2017, which the Director of the Federal Register approved for incorporation by reference as of April 17, 2019 84 FR
8961.
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.

In the FAAs ongoing efforts to improve the efficiency of the AD
process, the FAA initially worked with Airbus and EASA to develop a process to use certain EASA ADs as the primary source of information for compliance with requirements for corresponding FAA ADs. The FAA has since coordinated with other manufacturers and civil aviation authorities CAAs to use this process. As a result, EASA AD
20210011 will be incorporated by reference in the FAA final rule. This proposed AD would, therefore, require compliance with EASA AD 20210011
in its entirety, through that incorporation, except for any differences identified as exceptions in the regulatory text of this proposed AD.
Using common terms that are the same as the heading of a particular section in the EASA AD does not mean that operators need comply only with that section. For example, where the AD
requirement refers to all required actions and compliance times, compliance with this AD requirement is not limited to the section titled Required Actions and Compliance Times in the EASA AD. Service information specified in EASA AD
20210011 that is required for compliance with EASA AD 20210011
will be available on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20210611 after the FAA final rule is published.

Other Related Service Information Airbus Helicopters has issued Alert Service Bulletin No. ASB EC13585A
069, Revision 0, dated August 2, 2017.
The service information describes procedures for inspecting each affected hook assembly, replacing the retaining ring, and replacing the elastomeric energy absorber.
FAAs Determination and Requirements of This Proposed AD
These products have been approved by the aviation authority of another country, and are approved for operation in the United States. Pursuant to the bilateral agreement with the State of Design Authority, the FAA has been notified of the unsafe condition described in the MCAI referenced above. The FAA is proposing this AD
after evaluating all the relevant
PO 00000

Frm 00034

Fmt 4702

Sfmt 4702

Proposed AD Requirements This proposed AD would require replacing the retaining ring, inspecting the hoist cable hook assembly, and, if necessary, replacing the elastomeric energy absorber. This proposed AD
would also require accomplishing the actions specified in EASA AD 2021
0011 described previously, as incorporated by reference, except for any differences identified as exceptions in the regulatory text of this proposed AD.
Explanation of Required Compliance Information
Costs of Compliance The FAA estimates that this proposed AD affects 341 helicopters of U.S.
registry. The FAA estimates the following costs to comply with this proposed AD:

E:FRFM03AUP1.SGM

03AUP1