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Federal Register / Vol. 86, No. 156 / Tuesday, August 17, 2021 / Rules and Regulations
2 You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise.
i Astronics Armstrong Aerospace Engineering Order, ViaSat In-Flight Connectivity IFC System DEMOD Boeing 737800/900ER Series Aircraft, Document No. EO23964202, Revision B, dated April 25, 2016.
ii Astronics Connectivity Systems and Certification Service Bulletin SB44964201, dated July 8, 2021. The issue date of this document is identified only on page 3 of the document.
3 For Astronics service information identified in this AD, contact Astronics Armstrong Aerospace, 804 S Northpoint Blvd., Waukegan, IL 60085; telephone 847
2444500; internet https
www.Astronics.com.
4 You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 2062313195.
5 You may view this service information that is incorporated by reference at the National Archives and Records Administration NARA. For information on the availability of this material at NARA, email fr.inspection@nara.gov, or go to:
https www.archives.gov/federal-register/cfr/
ibr-locations.html.
Issued on August 11, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202117681 Filed 81321; 11:15 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210316; Project Identifier MCAI202000461E; Amendment 3921657; AD 20211510
RIN 2120AA64

Airworthiness Directives; GE Aviation Czech s.r.o. Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.
Turboprop Engines Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for all GE
Aviation Czech s.r.o. GEAC H75200, H80100, and H80200 model turboprop engines. This AD was prompted by several reports of engine gas generator speed Ng rollbacks occurring below idle on GEAC H75200, H80100, and H80200 model turboprop engines. This AD requires an
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SUMMARY:

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16:18 Aug 16, 2021

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inspection of a certain part number P/
N fuel control unit FCU and, if deficiencies are detected, replacement of the FCU with a part eligible for installation. The FAA is issuing this AD
to address the unsafe condition on these products.
DATES: This AD is effective September 21, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of September 21, 2021.
ADDRESSES: For service information identified in this final rule, contact GE
Aviation Czech, Beranovych 65 199 02
Praha 9Letnany, Czech Republic;
phone: +420 222 538 111. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call 781 238
7759. It is also available at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0316.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210316; 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, the mandatory continuing airworthiness information MCAI, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Barbara Caufield, Aviation Safety Engineer, ECO Branch, FAA, 1200
District Avenue, Burlington, MA 01803;
phone: 781 2387146; fax: 781 238
7199; email: barbara.caufield@faa.gov.
SUPPLEMENTARY INFORMATION:
Background The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to all GEAC H75200, H80100, and H80200 model turboprop engines.
The NPRM published in the Federal Register on April 20, 2021 86 FR
20465. The NPRM was prompted by several reports of engine gas generator speed Ng rollbacks occurring below idle on GEAC H75200, H80100, and H80200 model turboprop engines. The NPRM proposed to require an
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inspection of a certain P/N FCU and, if deficiencies are detected, replacement of the FCU with a part eligible for installation. The FAA is issuing this AD
to address the unsafe condition on these products.
The European Union Aviation Safety Agency EASA, which is the Technical Agent for the Member States of the European Community, has issued EASA
AD 20200082, dated April 1, 2020
referred to after this as the MCAI, to address the unsafe condition on these products. The MCAI states:
Several occurrences have been reported of engine gas generator speed Ng rollbacks below idle on engines equipped with an affected part.
The investigation determined that, during these events, the engine control lever ECL
was set to idle, and identified as contributing factors specific environmental temperatures, possibly in combination with a high power off-take. The idle setting may be used in flight, in particular during the approach phase.
This condition, if not detected and corrected, may lead to loss of engine power and eventually, on a single engine aeroplane, possibly result in loss of control.
To address this potential unsafe condition, GEAC issued the ASB providing applicable instructions.

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.
FAA20210316.
Discussion of Final Airworthiness Directive Comments The FAA received no comments on the NPRM or on the determination of the costs.
Conclusion The FAA reviewed the relevant data and determined that air safety requires adopting this AD as proposed.
Accordingly, the FAA is issuing this AD
to address the unsafe condition on these products. This AD is adopted as proposed in the NPRM.
Related Service Information Under 1
CFR Part 51
The FAA reviewed GE Aviation Czech Alert Service Bulletin ASB No. ASB
H80730000005200/ASBH7573
0000002200 single document, Revision 00, dated February 6, 2020.
The service information specifies procedures for performing a functional inspection of the FCU, P/N LUN
6590.078, and replacing the FCU. This service information is reasonably available because the interested parties have access to it through their normal
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