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Federal Register / Vol. 86, No. 136 / Tuesday, July 20, 2021 / Proposed Rules Confidential Business Information CBI is commercial or financial information that is both customarily and actually treated as private by its owner.
Under the Freedom of Information Act FOIA 5 U.S.C. 552, CBI is exempt from public disclosure. If your comments responsive to this NPRM
contain commercial or financial 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 Andrea Jimenez, Aerospace Engineer, COS Program Management Section, Operational Safety Branch, Compliance &
Airworthiness Division, FAA, 1600
Stewart Ave., Mail Stop: Room 410, Westbury, NY 11590; telephone 516
2287330; email andrea.jimenez@
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.

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Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20210096, dated March 31, 2021 EASA AD 2021
0096, to correct an unsafe condition for Leonardo S.p.A. Helicopters, formerly Finmeccanica S.p.A., AgustaWestland S.p.A., Agusta S.p.A.; and AgustaWestland Philadelphia Corporation, formerly Agusta Aerospace Corporation, Model A119 and AW119MKII helicopters, all serial numbers.
This proposed AD was prompted by reports of abnormal play on the collective torque tube on two Model AW119 MKII helicopters. Investigations revealed that these events were due to an erroneous manufacturing process, affecting certain collective torque tube assemblies. The affected batch numbers were identified. Leonardo S.p.a. Model A119 helicopters are similar in design and may be subject to the same unsafe condition revealed on the Model AW119 MKII helicopters. The FAA is proposing this AD to address abnormal play on the collective torque tube, which could result in reduced control of the helicopter, resulting in a forced landing and consequent damage to the helicopter and injury to occupants. See
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EASA AD 20210096 for additional background information.
FAAs Determination These helicopters have been approved by EASA and are approved for operation in the United States. Pursuant to the FAAs bilateral agreement with the European Union, EASA has notified the FAA about the unsafe condition described in its AD. The FAA is proposing this AD after evaluating all known relevant information and determining that the unsafe condition described previously is likely to exist or develop on other helicopters of these same type designs.
Related Service Information Under 1
CFR Part 51
EASA AD 20210096 requires repetitive inspections of the affected torque tube assemblies for any deficiency i.e., any play by marking the torque tube assembly and the collar and applying specific loads to determine if there is any play; and replacement of any affected part that has any play with a serviceable part. EASA
AD 20210096 also requires the eventual replacement of any affected part with a serviceable part, and specifies that replacement of an affected part on a helicopter constitutes terminating action for the repetitive inspections for that helicopter.
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.
Proposed AD Requirements in This NPRM
This proposed AD would require accomplishing the actions specified in EASA AD 20210096, described previously, as incorporated by reference, except for any differences identified as exceptions in the regulatory text of this proposed AD and except as discussed under Differences Between this Proposed AD and the EASA AD.
Explanation of Required Compliance Information In the FAAs ongoing efforts to improve the efficiency of the AD
process, the FAA developed a process to use certain civil aviation authority CAA ADs as the primary source of information for compliance with requirements for corresponding FAA
ADs. The FAA has been coordinating this process with manufacturers and CAAs. As a result, EASA AD 20210096
will be incorporated by reference in the FAA final rule. This proposed AD

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would, therefore, require compliance EASA AD 20210096 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 EASA AD 20210096 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 EASA AD 20210096.
Service information specified in EASA
AD 20210096 that is required for compliance with it will be available at https www.regulations.gov by searching for and locating Docket No.
FAA20210572 after the FAA final rule is published.
Differences Between This Proposed AD
and the EASA AD
EASA AD 20210096 supersedes EASA AD 20190057, dated March 20, 2019 EASA AD 20190057. The Group 1 helicopters identified in both EASA
AD 20210096 and EASA AD 2019
0057 are helicopters with collective stick torque tube assemblies having part number P/N 109001103105 and batch number 823207 or earlier.
Paragraph 1 of EASA AD 20210096
addresses Group 1 helicopters that have incorporated the actions required by paragraph 2 of EASA AD 20190057.
The FAA did not issue an AD that corresponds to EASA AD 20190057, therefore, this proposed AD would require, for Group 1 helicopters, an initial inspection of the torque tube assembly within 50 hours time-inservice TIS after the effective date of the FAA AD and repetitive inspections thereafter at intervals not to exceed 100
hours TIS.
In addition, where paragraph 5 of EASA AD 20210096 specifies, for Group 1 helicopters, replacement of an affected part with a serviceable part within 36 months after April 3, 2019
the effective date of EASA AD 2019
0057, for this proposed AD, the compliance time would be within 24
months after the effective date of the FAA AD.
Costs of Compliance The FAA estimates that this proposed AD affects 136 helicopters of U.S.
registry. The FAA estimates the following costs to comply with this proposed AD:

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