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Federal Register / Vol. 86, No. 210 / Wednesday, November 3, 2021 / Rules and Regulations engines and Avia Propeller AV 725
propellers.
After EASA AD 20180075 was issued, it was identified that the engine push-pull control settings may be inadvertently changed after certain maintenance, repair, or modification action. For that reason, the engine push-pull control needed further inspection and adjustment. Affected maintenance, repair, or modification procedures include, but are not limited to, the replacement of a fuel control unit or a propeller governor. Furthermore, it was determined that H85200 engines are also affected by the new requirements.
Consequently, EASA issued AD 20190089, retaining the requirements of EASA AD
20180075, which was superseded, and requiring conditional repetitive inspections and, depending on findings, adjustment of the push-pull control settings. That EASA
AD also expanded the applicability to include H85200 engines.
After EASA AD 20190089 was issued, GEAC developed an improved engine pushpull control which reduces further the risk of uncommanded in-flight reverse of the propeller, and published the original issue of the ASB2. Consequently, EASA issued AD
20190244, retaining the requirements of EASA AD 20190089, which was superseded, and requiring installation of the new engine push-pull controls. That EASA
AD also required inspections of modified engines.
Since that EASA AD was issued, based on the field experience gained from the inspections and replacements of Push-Pull Control System performed in accordance with the ASB2 revision 03, GEAC issued the ASB2 now at revision 04, as defined in this EASA AD, which provides additional clarifications and more accurate description of the adjustments of the controls and regulation and engine testing after hardware replacement. The ASB2 also improves the sequence of steps, thus helping to prevent erroneous accomplishment of the inspection and modification instructions. It has also been determined that for certain engines no repetitive inspections are required.
For the reason described above, this EASA AD partially retains the requirements of EASA AD 20190244, which is superseded, but requires accomplishment of required actions in accordance with the improved GEAC instructions.

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You may obtain further information by examining the MCAI in the AD
docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210836.
The FAA is issuing this AD to address the unsafe condition on these products.
FAAs Determination This product has been approved by EASA and is approved for operation in the United States. Pursuant to the FAAs bilateral agreement with the European Community, EASA has notified us of the unsafe condition described in the MCAI. The FAA is issuing this AD
because the agency evaluated the
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relevant information provided by EASA
and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design.

Group 5 engines. This AD does not specify allowances, as it simply allows installation of engines with push-pull control P/N M60176.5 or M60176.4, as applicable, installed.

Related Service Information Under 1
CFR Part 51
The FAA reviewed GEAC Service Bulletin SB SBH807600000036
02, Revision No. 02, dated March 29, 2018; GEAC SB SBH80760000
0036 03, Revision No. 03, dated April 12, 2019; and GEAC Alert SB ASB
H80760000004801/ASBH8576
00000015 01 single document, formatted as service bulletin identifier revision number, dated April 12, 2019. The SBs and the Alert SB, differentiated by affected engine model, describe procedures for inspecting and adjusting the engine push-pull control, part number P/N M60176.3. The SBs also describe procedures for replacing beta switch, P/N PS2, with beta switch, P/N PS2A. The Alert SB also adds GEAC H85200 model turboprop engines to its effectivity.
The FAA also reviewed GEAC Alert SB ASBH80760000004704/ASB
H85760000001804 single document, formatted as service bulletin identifier revision number, dated May 8, 2020. The Alert SB describes procedures for replacing and inspecting the engine push-pull control system.
The FAA also reviewed Section 72
0000, EnginePlanned Inspections, dated December 14, 2012; of the GE
AviationBusiness & General AviationTurboprops Maintenance Manual, Manual Part No. 0983402, Rev.
22, dated December 18, 2020 the GE
Aviation Maintenance Manual. Section 720000 of the GE Aviation Maintenance Manual describes procedures for performing Type 2 and Type 3 inspections.
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 ADDRESSES.

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 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.
The FAA justifies waiving notice and comment prior to adoption of this rule because no domestic operators use this product. Accordingly, notice and opportunity for prior public comment are unnecessary, pursuant to 5 U.S.C.
553b3B. In addition, for the foregoing reason, the FAA finds that good cause exists pursuant to 5 U.S.C.
553d for making this amendment effective in less than 30 days.

AD Requirements This AD requires inspection and adjustment of the engine push-pull control, replacement of certain beta switches, inspection and adjustment of the engine push-pull control after any maintenance, repair or modification action that affects the push-pull control, and installation of an improved pushpull control.
Differences Between This AD and the MCAI or Service Information EASA AD 20200143 specifies installation allowances for Group 4 and
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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. FAA20210836
and Project Identifier MCAI2020
01629E at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, 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
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