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Federal Register / Vol. 86, No. 178 / Friday, September 17, 2021 / Proposed Rules
Section, International Validation Branch, 901
Locust, Room 301, Kansas City, MO 64106;
phone: 816 3294059; fax: 816 3294090;
email: doug.rudolph@faa.gov.
2 Refer to European Union Aviation Safety Agency EASA AD 20210098, dated April 9, 2021, for more information. You may examine the EASA AD in the AD docket at https www.regulations.gov by searching for and locating it in Docket No. FAA2021
0786.
3 For service information identified in this AD, contact Pilatus Aircraft Ltd., Customer Support General Aviation, CH
6371 Stans, Switzerland; phone: +41 848 24
7 365; email: techsupport.ch@pilatusaircraft.com; website: https www.pilatusaircraft.com. You may view this referenced service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, MO
64106. For information on the availability of this material at the FAA, call 816 3294148.
Issued on September 9, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202119961 Filed 91621; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210792; Project Identifier AD202000593G
RIN 2120AA64

Airworthiness Directives; DG
Flugzeugbau GmbH Gliders Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

The FAA proposes to adopt a new airworthiness directive AD for all DG Flugzeugbau GmbH Models DG
500MB and DG1000M gliders with a Solo Kleinmotoren GmbH Solo Model 2625 02i engine installed. This proposed AD was prompted by mandatory continuing airworthiness information MCAI issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI
describes the unsafe condition as an error in the engine control unit ECU
software. This proposed AD would require updating the ECU software. The FAA is proposing this AD to address the unsafe condition on these products.
DATES: The FAA must receive comments on this proposed AD by November 1, 2021.
SUMMARY:

VerDate Sep<11>2014

15:47 Sep 16, 2021

Jkt 253001

You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202 4932251.
Mail: U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Hand Delivery: Deliver to Mail address above between 9 a.m. and 5
p.m., Monday through Friday, except Federal holidays.
For service information identified in this NPRM, contact Solo Kleinmotoren GmbH, Postfach 600152, D71050
Sindelfingen, Germany; phone: +49 703
13010; fax: +49 703 1301136; email:
aircraft@solo-germany.com; website:
https aircraft.solo.global/gb/. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call 816 3294148.

ADDRESSES:

Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210792; 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 NPRM, the MCAI, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT: Jim Rutherford, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO
64106; phone: 816 3294165; fax: 816
3294090; email: jim.rutherford@
faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under ADDRESSES. Include Docket No.
FAA20210792; Project Identifier AD
202000593G 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 proposal because of those comments.

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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 NPRM.
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 Jim Rutherford, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO
64106. Any commentary that the FAA
receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking.
Background The European Union Aviation Safety Agency EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20200056, dated March 13, 2020
referred to after this as the MCAI, to address an unsafe condition on Solo Kleinmotoren GmbH Solo Model 2625
02 engines, variation 02i with electronic fuel injection, installed on but not limited to Binder Motorenbau, DGFlugzeugbau and Schempp-Hirth powered sailplanes gliders. The MCAI
states:
An error was found in the ECU affected SW
software that can cause brief injection of fuel into one cylinder when the ECU is activated.
This condition, if not corrected, could increase the time needed to restart the engine in flight, possibly resulting in reduced control of the powered sailplane.
To address this potential unsafe condition, SOLO Kleinmotoren GmbH, together with the ECU manufactuerer sic, developed an ECU
SW update and issued the SB service
E:FRFM17SEP1.SGM

17SEP1