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Federal Register / Vol. 86, No. 228 / Wednesday, December 1, 2021 / Proposed Rules
part costing $95. The average labor rate is $85 per work-hour. Based on these figures, the FAA estimates the cost to replace the hex-nut on U.S. operators to be $1,380 assuming all 10 gliders have this configuration or $138 per glider.
In addition, the FAA estimates that for gliders with the affected ball bearing assemblies, replacement would take about 4 work-hours for both ball bearing assemblies and require ball bearing assemblies costing $118 2 units. The average labor rate is $85 per work-hour.
Based on these figures, the FAA
estimates the cost of the ball bearing assembly replacement on U.S. operators to be $4,580 assuming all 10 gliders have this configuration or $458 per glider.
Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII:
Aviation Programs, describes in more detail the scope of the Agencys authority.
The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under that section, Congress charges the FAA
with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce.
This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.

lotter on DSK11XQN23PROD with PROPOSALS1

Regulatory Findings The FAA determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.
For the reasons discussed above, I
certify this proposed regulation:
1 Is not a significant regulatory action under Executive Order 12866, 2 Would not affect intrastate aviation in Alaska, and 3 Would not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

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List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

DG Flugzeugbau GmbH and Schempp-Hirth Flugzeugbau GmbH Gliders: Docket No.
FAA20211015; Project Identifier 2019CE014AD.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by January 18, 2022.
b Affected ADs None.
c Applicability This AD applies to DG Flugzeugbau GmbH
Model DG1000T gliders and Schempp-Hirth Flugzeugbau GmbH Model Duo Discus T
gliders, certificated in any category, with a Solo Kleinmotoren GmbH Solo Model 2350C
or 2350D engine, all serial numbers, installed.
d Subject Joint Aircraft System Component JASC
Code 7200, Engine Turbine/Turboprop.
e Unsafe Condition This 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 failure of the bearing of the upper pulley of the belt driven reduction gear. The FAA is issuing this AD to prevent separation of the propeller from the engine. The unsafe condition, if not addressed, could result in loss of control of the aircraft.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Actions and Compliance 1 Within 12 months after the effective date of this AD, remove the nut installed at the excentric axle from service and replace it with a nut in accordance with the Condition section, paragraph a, of Solo Kleinmotoren GmbH Service Bulletin 460318, dated January 22, 2019.

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2 Before either ball bearing assembly at the bearing block of the reduction gear accumulates 15 years since first installation on an engine or within 12 months after the effective date of this AD, whichever occurs later, and thereafter at intervals not to exceed 15 years, remove both ball bearing assemblies from service and replace with new zero hours time-in-service ball bearing assemblies in accordance with the Condition section, paragraph b, of Solo Kleinmotoren GmbH
Service Bulletin 460318, dated January 22, 2019.
3 After replacing the ball bearing assemblies required by paragraph g2 of this AD, record compliance in the aircraft log book. The entry must include: 1 Reduction gear part number P/N and serial number;
and 2 date ball bearing assemblies were replaced.
4 As of the effective date of this AD, do not install a hex-nut P/N 0028143 on any engine.
5 As of the effective date of this AD, do not install ball bearing assembly P/N
0050110 on any engine unless it is new zero hours time-in-service.
h Alternative Methods of Compliance AMOCs 1 The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph i1 of this AD or email: 9-AVS-AIR-730-AMOC@faa.gov.
2 Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/
certificate holding district office.
i Related Information 1 For more information about this AD, 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.
2 Refer to European Aviation Safety Agency EASA AD 20190029, dated February 8, 2019, 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
1015.
3 For service information identified in this AD, contact Solo Kleinmotoren GmbH, Postfach 600152, D71050 Sindelfingen, Germany; phone: +49 703 13010; fax: +49
703 1301136; email: aircraft@sologermany.com; website: http aircraft.soloonline.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.

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