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Federal Register / Vol. 86, No. 55 / Wednesday, March 24, 2021 / Rules and Regulations S.p.A., Model A109E, A109K2, and A109C helicopters, all serial numbers.
EASA advises that recent occurrences of affected parts detachment have been reported. EASA advises that the visual inspection for MRBs with tip cap P/N
709010329109 installed is no longer acceptable to detect part cracking and that this condition, if not detected and corrected, could lead to further affected parts detachments, possibly resulting in reduced control of the helicopter.
Accordingly, EASA AD 20200230
replaces the requirements of EASA AD
20070306E for MRBs with a tip cap P/
N 709010329109 installed, by changing the visual inspections of affected parts to dye-penetrant inspections and requires, depending on findings, replacement.

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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 issuing 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 the same type designs.
Related Service Information Under 1
CFR Part 51
The FAA previously reviewed the following Agusta Alert Bollettino Tecnicos BT, each Revision B and each dated December 19, 2000:
No. 109106 which applies to Model A109C helicopters;
No. 109EP1 which applies to Model A109E helicopters; and No. 109K22 which applies to Model A109K2 helicopters.
These BTs specify procedures for inspecting the MRB tip cap for bonding separation and a crack; a tap inspection of the tip cap for bonding separation in the blade bond; and a dye-penetrant inspection of the tip cap leading edge along the welded joint line of the upper and lower tip cap skin shells for a crack.
The FAA reviewed the following Leonardo Helicopters Alert Service Bulletins ASBs, each Revision A and each dated October 19, 2020:
No. 109125 which applies to Model A109C helicopters;
No. 109EP085 which applies to Model A109E helicopters; and No. 109K048 which applies to Model A109K2 helicopters.
These ASBs specify dye-penetrant inspecting the tip cap P/N 7090103
29109 for cracks on the tip cap leading
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edge at the welded bead joint line of shells and removes the magnifying glass inspection that was specified in the original ASBs.
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.
AD Requirements This AD continues to require, for an MRB with a S/N that has a prefix of either EMor A5-, except an MRB
with a tip cap P/N 709010329109
installed, within 10 hours TIS after the effective date of this AD and thereafter at intervals not to exceed 25 hours TIS, tap inspecting each tip cap for bonding separation in specified areas; tap inspecting for bonding separation in the tip cap to blade bond area; visually inspecting the upper and lower sides of each blade tip cap for swelling or deformation; and dye-penetrant inspecting the tip cap leading edge along the welded joint line of the upper and lower tip cap skin shells for a crack.
If there is any swelling, deformation, or crack, or bonding separation that exceeds allowable limits, removing the blade from service is required before further flight; if there is no swelling, deformation or crack, or if bonding separation does not exceed allowable limits, continuing the inspections is required.
For an MRB with a tip cap P/N 709
010329109 installed, this AD now requires, for each tip cap with less than 600 hours TIS, before reaching 600
hours TIS, and thereafter, at intervals not to exceed 50 hours TIS, or for each tip cap with 600 or more hours TIS, within the next 5 hours TIS or 30 days after the effective date of this AD, whichever occurs first, and thereafter at intervals not to exceed 50 hours TIS, dye-penetrant inspecting the welded bead on the tip cap leading edge joint line between the two metal shells for a crack and removing the tip cap from service if there is a crack.
This AD also prohibits installing an MRB with tip cap P/N 709010329
109 on any helicopter unless it has been inspected in accordance with the inspection requirements of this AD.
Justification for Immediate Adoption and Determination of the Effective Date Section 553b3B of the Administrative Procedure Act APA 5
U.S.C. 551 et seq. authorizes agencies to dispense with notice and comment procedures for rules when the agency, for good cause, finds that those procedures are impracticable, unnecessary, or contrary to the public
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interest. Under this section, an agency, upon finding good cause, may issue a final rule without providing notice and seeking comment prior to issuance.
Further, section 553d of the APA
authorizes agencies to make rules effective in less than thirty days, upon a finding of good cause.
An unsafe condition exists that requires the immediate adoption of this AD without providing an opportunity for public comments prior to adoption.
The FAA has found that the risk to the flying public justifies foregoing notice and comment prior to adoption of this rule because inspections for certain MRBs must be accomplished within 5 or 10 hours TIS after the effective date of this AD, depending on the MRB, and corrective action is required before further flight. Accordingly, notice and opportunity for prior public comment are impracticable and contrary to the public interest pursuant to 5 U.S.C.
553b3B. In addition, the FAA finds that good cause exists pursuant to 5
U.S.C. 553d for making this amendment effective in less than 30
days, for the same reasons the FAA
found good cause to forego notice and comment.
Comments Invited The FAA invites you to send any written data, views, or arguments about this final rule. Send your comments to an address listed under ADDRESSES.
Include Docket No. FAA20210194;
Project Identifier MCAI202001434R
at the beginning of your comments. The most helpful comments reference a specific portion of the final rule, explain the reason for any recommended change, and include supporting data.
The FAA will consider all comments received by the closing date and may amend this final rule because of those comments.
Except for Confidential Business Information CBI as described in the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to https
www.regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this final rule.
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 AD contain commercial or financial information
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