Airworthiness Directives; Stemme AG Gliders, 3926-3928 [2022-01479]

Download as PDF 3926 Federal Register / Vol. 87, No. 17 / Wednesday, January 26, 2022 / Rules and Regulations Approval (DOA). If approved by the DOA, the approval must include the DOAauthorized signature.’’ (2) Where EASA AD 2021–0289–E requires compliance in terms of flight hours, this AD requires using hours time-in-service. (3) Where EASA AD 2021–0289–E refers to its effective date, this AD requires using the effective date of this AD. (4) Where paragraph (1) of EASA AD 2021– 0289–E specifies to ‘‘inform all flight crews, and, thereafter, operate the helicopter accordingly,’’ this AD does not require those actions. (5) The action required by paragraphs (1) and (2) of EASA AD 2021–0289–E may be performed by the owner/operator (pilot) holding at least a private pilot certificate and must be entered into the aircraft records showing compliance with this AD in accordance with 14 CFR 43.9(a)(1) through (4) and 14 CFR 91.417(a)(2)(v). The record must be maintained as required by 14 CFR 91.417 or 135.439. (6) This AD does not mandate compliance with the ‘‘Remarks’’ section of EASA AD 2021–0289–E. (i) Special Flight Permit Special flight permits may be permitted provided that there are no passengers on board. BILLING CODE 4910–13–P khammond on DSKJM1Z7X2PROD with RULES (k) Related Information For more information about this AD, contact Hal Jensen, Aerospace Engineer, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 950 L’Enfant Plaza N SW, Washington, DC 20024; telephone (202) 267–9167; email hal.jensen@ faa.gov. (l) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless this AD specifies otherwise. (i) European Union Aviation Safety Agency (EASA) Emergency AD 2021–0289–E, dated December 23, 2021. (ii) [Reserved] 15:49 Jan 25, 2022 Jkt 256001 Issued on January 13, 2022. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022–01540 Filed 1–24–22; 11:15 am] (j) 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 International Validation Branch, send it to the attention of the person identified in paragraph (k) of this AD. Information may be emailed to: 9-AVS-AIR730-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. VerDate Sep<11>2014 (3) For EASA AD 2021–0289–E, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu; internet www.easa.europa.eu. You may find the EASA material on the EASA website at https://ad.easa.europa.eu. (4) You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N–321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222–5110. This material may be found in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2022–0009. (5) You may view this material 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/ibrlocations.html. DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2021–1010; Project Identifier MCAI–2020–00807–G; Amendment 39–21924; AD 2022–03–07] RIN 2120–AA64 Airworthiness Directives; Stemme AG Gliders Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain Stemme AG TSA–M Model S6 and S6– RT gliders. 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 a new version of the propeller gearbox tooth belt with a reduced life limit. This AD requires establishing a life limit of 5 years for certain propeller gearbox tooth belts. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective March 2, 2022. ADDRESSES: For service information identified in this final rule, contact SUMMARY: PO 00000 Frm 00006 Fmt 4700 Sfmt 4700 Stemme AG, Flugplatzstrasse F2, Nr. 6–7, D–15344 Strausberg, Germany; phone: +49 (0) 3341 3612–0; fax: +49 (0) 3341 3612–30; email: airworthiness@ stemme.de; website: https:// www.stemme.com. 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 (817) 222–5110. It is also available at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–1010. Examining the AD Docket You may examine the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–1010; 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 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 W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590. 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) 329–4165; email: jim.rutherford@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 certain Stemme AG TSA–M Model S6 and S6–RT gliders. The NPRM published in the Federal Register on November 22, 2021 (86 FR 66229). The NPRM was prompted by MCAI originated by the European Union Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Union. EASA issued EASA AD 2020–0140, dated June 23, 2020 (referred to after this as ‘‘the MCAI’’), to address an unsafe condition on Stemme AG (Stemme) TSA–M Model S6 and S6–RT powered sailplanes (gliders) and ASP S15–1 airplanes. The MCAI states: The airworthiness limitations for Stemme TSA–M powered sailplanes and Stemme ASP aeroplanes, which are approved by EASA, are currently defined and published in Chapter 4 of the applicable AMM [aircraft maintenance manual]. These instructions have been identified as mandatory for continued airworthiness. E:\FR\FM\26JAR1.SGM 26JAR1 Federal Register / Vol. 87, No. 17 / Wednesday, January 26, 2022 / Rules and Regulations Failure to accomplish these instructions could result in an unsafe condition. During a regular incoming part inspection at Stemme, the supplier delivered a new version of the tooth belts used in the propeller gearbox. The new part (with marking ‘‘Carbon’’) deviates from the previously used part (with marking ‘‘Extreme’’) by its layer build up. The new tooth belt has been found airworthy, although with a reduced life limit. Before Stemme identified the issue, new tooth belts were delivered, identified as Part Number (P/N) 830.185, the same as the previous part. These parts have to be identified by inspection, changed to P/N 832.502, and the reduced life limit implemented. Consequently, Stemme issued the applicable ALS [airworthiness limitations section] introducing the new life limit for the new part. Stemme also issued the SB [service bulletin] providing additional instructions on relevant inspections and corrective actions. For the reasons described above, this [EASA] AD requires a one-time inspection of the propeller gearbox tooth belts, and, depending on findings, re-identification. This [EASA] AD also requires implementation of the reduced life limit by accomplishment of the actions specified in the applicable ALS. After issuance of the MCAI, EASA approved extending the life limit of the new ‘‘Synchroforce Carbon’’ belt to 5 years, the same as the original ‘‘Extreme’’ belt, as documented by Stemme in Revision 15 to the AMM Chapter 04 ALS. You may examine the MCAI in the AD docket at https:// www.regulations.gov by searching for and locating Docket No. FAA–2021– 1010. Discussion of Final Airworthiness Directive Comments The FAA received one comment from an individual commenter. The commenter supported the NPRM without change. khammond on DSKJM1Z7X2PROD with RULES Conclusion This product has been approved by the aviation authority of another country and is approved for operation in the United States. Pursuant to the FAA’s bilateral agreement with this State of Design Authority, it has notified the FAA of the unsafe condition described in the MCAI and service information referenced above. The FAA reviewed the relevant data, considered the comment received, 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. VerDate Sep<11>2014 15:49 Jan 25, 2022 Jkt 256001 3927 Related Service Information Authority for This Rulemaking The FAA reviewed Stemme Service Bulletin Doc. No. P062–980049, Revision 00, dated May 27, 2020. This service information specifies identifying the front propeller gearbox tooth belt, revising the AMM and illustrated parts catalogue, and introducing a life limit for the propeller gearbox tooth belt marked ‘‘Synchroforce Carbon.’’ Title 49 of the United States Code specifies the FAA’s 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 Agency’s 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. Differences Between This AD and the MCAI or Service Information The MCAI applies to Stemme AG Model ASP S15–1 airplanes, and this AD does not because that model does not have an FAA type certificate. The MCAI requires an inspection to determine whether the propeller gearbox tooth belts are ‘‘Synchroforce Carbon’’ or ‘‘Extreme.’’ This AD does not require this inspection because instead, it applies only to gliders with a ‘‘Synchroforce Carbon’’ propeller gearbox tooth belt installed. The MCAI requires revising the existing aircraft maintenance program (AMP) to introduce the reduced life limit for the affected propeller gearbox tooth belt, as well as other life limits, as specified in the Temporary Revision to the aircraft maintenance manual airworthiness limitations section (ALS). After the AMP is revised, the MCAI does not require recording AD compliance on a continued basis each time a task in the revised AMP is performed. Because the AMP is not required for U.S. operators and the ALS specified in the MCAI includes additional tasks that do not address the unsafe condition, this AD establishes a life limit for the affected propeller gearbox tooth belt by requiring that it be removed from service after 5 years. Operators are required to record AD compliance each time an affected propeller gearbox tooth belt reaches its life limit and is replaced. Stemme Service Bulletin Doc. No. P062–980049, Revision 00, dated May 27, 2020, requires reporting information to Stemme AG, and this AD does not. Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will 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 that this AD. For the reasons discussed above, I certify this AD. (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Will not affect intrastate aviation in Alaska, and (3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Costs of Compliance The Amendment The FAA estimates that this AD affects 3 gliders of U.S. registry. The FAA estimates that it will take 4 work hours to replace the propeller gearbox tooth belt and require a part costing $300. The average labor rate is $85 per work hour. Based on these figures, the FAA estimates the cost to replace the propeller gearbox tooth belt on U.S. operators to be $1,920 or $640 per glider, every 5 years. Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PO 00000 Frm 00007 Fmt 4700 Sfmt 4700 PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. E:\FR\FM\26JAR1.SGM 26JAR1 3928 § 39.13 Federal Register / Vol. 87, No. 17 / Wednesday, January 26, 2022 / Rules and Regulations [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive: ■ 2022–03–07 Stemme AG: Amendment 39– 21924; Docket No. FAA–2021–1010; Project Identifier MCAI–2020–00807–G. (a) Effective Date This airworthiness directive (AD) is effective March 2, 2022. (b) Affected ADs None. (c) Applicability This AD applies to Stemme AG TSA–M Model S6 and S6–RT gliders, all serial numbers, certificated in any category, with a propeller gearbox tooth belt marked ‘‘Synchroforce Carbon’’ installed. (d) Subject Joint Aircraft System Component (JASC) Code 6100, Propeller System. khammond on DSKJM1Z7X2PROD with RULES (g) Required Actions Before the propeller gearbox tooth belt accumulates 5 years since installation on a glider or within 30 days after the effective date of this AD, whichever occurs later, and thereafter at intervals not to exceed 5 years, remove the propeller gearbox tooth belt from service and install a propeller gearbox tooth belt with 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 (i)(1) of this AD and email to: 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. Jkt 256001 Issued on January 20, 2022. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. BILLING CODE 4910–13–P (f) Compliance Comply with this AD within the compliance times specified, unless already done. 15:49 Jan 25, 2022 (j) Material Incorporated by Reference None. [FR Doc. 2022–01479 Filed 1–25–22; 8:45 am] (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 a new version of the propeller gearbox tooth belt with a reduced life limit. The FAA is issuing this AD to prevent a propeller gearbox tooth belt remaining in service beyond its fatigue life. The unsafe condition, if not addressed, could result in failure of the propeller gearbox tooth belt and reduced control of the glider. VerDate Sep<11>2014 (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) 329–4165; email: jim.rutherford@faa.gov. (2) Refer to European Union Aviation Safety Agency (EASA) AD 2020–0140, dated June 23, 2020, for more information. You may examine the EASA AD in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–1010. DEPARTMENT OF LABOR Occupational Safety and Health Administration 29 CFR Part 1910 [Docket No. OSHA–2020–0007] RIN 1218–AD42 COVID–19 Vaccination and Testing; Emergency Temporary Standard Occupational Safety and Health Administration (OSHA), Labor. ACTION: Interim final rule; withdrawal. AGENCY: OSHA is withdrawing the November 5, 2021, emergency temporary standard (ETS) which was issued to protect unvaccinated employees of large employers (100 or more employees) from the risk of contracting COVID–19 by strongly encouraging vaccination. DATES: The withdrawal is effective January 26, 2022. ADDRESSES: In accordance with 28 U.S.C. 2112(a), the agency designates Edmund C. Baird, Associate Solicitor of Labor for Occupational Safety and Health, Office of the Solicitor, U.S. Department of Labor, to receive petitions for review of this agency action. Service can be accomplished by email to zzSOL-Covid19-ETS@dol.gov. FOR FURTHER INFORMATION CONTACT: General information and press inquiries: Contact Frank Meilinger, Director, Office of Communications, U.S. Department of Labor; telephone (202) 693–1999; email meilinger.francis2@dol.gov. For technical inquiries: Contact Andrew Levinson, Directorate of SUMMARY: PO 00000 Frm 00008 Fmt 4700 Sfmt 4700 Standards and Guidance, U.S. Department of Labor; telephone (202) 693–1950. SUPPLEMENTARY INFORMATION: I. Background and Rationale for Withdrawal On November 5, 2021, OSHA adopted an emergency temporary standard (the Vaccination and Testing ETS), under sections 4, 6(c), and 8 of the Occupational Safety and Health Act of 1970 (29 U.S.C. 653, 655(c), 657), to protect unvaccinated employees of large employers (100 or more employees) from the risk of contracting COVID–19 by strongly encouraging vaccination (86 FR 61402). The Vaccination and Testing ETS required covered employers to develop, implement, and enforce a mandatory COVID–19 vaccination policy, with an exception for employers that instead adopted a policy requiring employees to either get vaccinated or elect to undergo regular COVID–19 testing and wear a face covering at work in lieu of vaccination. That ETS also serves as a ‘‘proposed rule’’ for a ‘‘proceeding’’ to promulgate an occupational safety or health standard. 29 U.S.C. 655(c)(3); see 29 U.S.C. 655(b). On January 13, 2022, the U.S. Supreme Court stayed the Vaccination and Testing ETS, finding that challengers were likely to prevail on their claims. Nat’l Fed’n of Indep. Bus. v. Dep’t of Labor, 595 U.S. __, __(2022) (per curium) (slip op. at 5, 9). After evaluating the Court’s decision, OSHA is withdrawing the Vaccination and Testing ETS as an enforceable emergency temporary standard. To the extent that this withdrawal is not already generally exempt from the notice and comment requirements of the Administrative Procedure Act and the OSH Act, OSHA finds good cause that the opportunity for public comment on this withdrawal is impracticable, unnecessary, and contrary to the public interest within the meaning of 5 U.S.C. 553(b)(B), and 29 U.S.C. 655(b) because it would unnecessarily delay the resolution of ambiguity for employers and workers alike. This agency action becomes effective immediately both because there is good cause and because the action removes a requirement on the regulated community. 5 U.S.C. 553(d)(1), (3). Although OSHA is withdrawing the Vaccination and Testing ETS as an enforceable emergency temporary standard, OSHA is not withdrawing the ETS to the extent that it serves as a proposed rule under section 6(c)(3) of the Act, and this action does not affect the ETS’s status as a proposal under section 6(b) of the Act or otherwise E:\FR\FM\26JAR1.SGM 26JAR1

Agencies

[Federal Register Volume 87, Number 17 (Wednesday, January 26, 2022)]
[Rules and Regulations]
[Pages 3926-3928]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-01479]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-1010; Project Identifier MCAI-2020-00807-G; 
Amendment 39-21924; AD 2022-03-07]
RIN 2120-AA64


Airworthiness Directives; Stemme AG Gliders

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Stemme AG TSA-M Model S6 and S6-RT gliders. 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 a new version of the propeller gearbox tooth 
belt with a reduced life limit. This AD requires establishing a life 
limit of 5 years for certain propeller gearbox tooth belts. The FAA is 
issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective March 2, 2022.

ADDRESSES: For service information identified in this final rule, 
contact Stemme AG, Flugplatzstrasse F2, Nr. 6-7, D-15344 Strausberg, 
Germany; phone: +49 (0) 3341 3612-0; fax: +49 (0) 3341 3612-30; email: 
[email protected]; website: https://www.stemme.com. 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 (817) 
222-5110. It is also available at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2021-1010.

Examining the AD Docket

    You may examine the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2021-1010; 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 
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 W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.

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) 329-4165; email: [email protected].

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 certain Stemme AG TSA-M 
Model S6 and S6-RT gliders. The NPRM published in the Federal Register 
on November 22, 2021 (86 FR 66229). The NPRM was prompted by MCAI 
originated by the European Union Aviation Safety Agency (EASA), which 
is the Technical Agent for the Member States of the European Union. 
EASA issued EASA AD 2020-0140, dated June 23, 2020 (referred to after 
this as ``the MCAI''), to address an unsafe condition on Stemme AG 
(Stemme) TSA-M Model S6 and S6-RT powered sailplanes (gliders) and ASP 
S15-1 airplanes. The MCAI states:

    The airworthiness limitations for Stemme TSA-M powered 
sailplanes and Stemme ASP aeroplanes, which are approved by EASA, 
are currently defined and published in Chapter 4 of the applicable 
AMM [aircraft maintenance manual]. These instructions have been 
identified as mandatory for continued airworthiness.

[[Page 3927]]

    Failure to accomplish these instructions could result in an 
unsafe condition.
    During a regular incoming part inspection at Stemme, the 
supplier delivered a new version of the tooth belts used in the 
propeller gearbox. The new part (with marking ``Carbon'') deviates 
from the previously used part (with marking ``Extreme'') by its 
layer build up. The new tooth belt has been found airworthy, 
although with a reduced life limit.
    Before Stemme identified the issue, new tooth belts were 
delivered, identified as Part Number (P/N) 830.185, the same as the 
previous part. These parts have to be identified by inspection, 
changed to P/N 832.502, and the reduced life limit implemented.
    Consequently, Stemme issued the applicable ALS [airworthiness 
limitations section] introducing the new life limit for the new 
part. Stemme also issued the SB [service bulletin] providing 
additional instructions on relevant inspections and corrective 
actions.
    For the reasons described above, this [EASA] AD requires a one-
time inspection of the propeller gearbox tooth belts, and, depending 
on findings, re-identification. This [EASA] AD also requires 
implementation of the reduced life limit by accomplishment of the 
actions specified in the applicable ALS.

    After issuance of the MCAI, EASA approved extending the life limit 
of the new ``Synchroforce Carbon'' belt to 5 years, the same as the 
original ``Extreme'' belt, as documented by Stemme in Revision 15 to 
the AMM Chapter 04 ALS.
    You may examine the MCAI in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-
1010.

Discussion of Final Airworthiness Directive

Comments

    The FAA received one comment from an individual commenter. The 
commenter supported the NPRM without change.

Conclusion

    This product has been approved by the aviation authority of another 
country and is approved for operation in the United States. Pursuant to 
the FAA's bilateral agreement with this State of Design Authority, it 
has notified the FAA of the unsafe condition described in the MCAI and 
service information referenced above. The FAA reviewed the relevant 
data, considered the comment received, 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

    The FAA reviewed Stemme Service Bulletin Doc. No. P062-980049, 
Revision 00, dated May 27, 2020. This service information specifies 
identifying the front propeller gearbox tooth belt, revising the AMM 
and illustrated parts catalogue, and introducing a life limit for the 
propeller gearbox tooth belt marked ``Synchroforce Carbon.''

Differences Between This AD and the MCAI or Service Information

    The MCAI applies to Stemme AG Model ASP S15-1 airplanes, and this 
AD does not because that model does not have an FAA type certificate.
    The MCAI requires an inspection to determine whether the propeller 
gearbox tooth belts are ``Synchroforce Carbon'' or ``Extreme.'' This AD 
does not require this inspection because instead, it applies only to 
gliders with a ``Synchroforce Carbon'' propeller gearbox tooth belt 
installed.
    The MCAI requires revising the existing aircraft maintenance 
program (AMP) to introduce the reduced life limit for the affected 
propeller gearbox tooth belt, as well as other life limits, as 
specified in the Temporary Revision to the aircraft maintenance manual 
airworthiness limitations section (ALS). After the AMP is revised, the 
MCAI does not require recording AD compliance on a continued basis each 
time a task in the revised AMP is performed. Because the AMP is not 
required for U.S. operators and the ALS specified in the MCAI includes 
additional tasks that do not address the unsafe condition, this AD 
establishes a life limit for the affected propeller gearbox tooth belt 
by requiring that it be removed from service after 5 years. Operators 
are required to record AD compliance each time an affected propeller 
gearbox tooth belt reaches its life limit and is replaced.
    Stemme Service Bulletin Doc. No. P062-980049, Revision 00, dated 
May 27, 2020, requires reporting information to Stemme AG, and this AD 
does not.

Costs of Compliance

    The FAA estimates that this AD affects 3 gliders of U.S. registry. 
The FAA estimates that it will take 4 work hours to replace the 
propeller gearbox tooth belt and require a part costing $300. The 
average labor rate is $85 per work hour. Based on these figures, the 
FAA estimates the cost to replace the propeller gearbox tooth belt on 
U.S. operators to be $1,920 or $640 per glider, every 5 years.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's 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 Agency's 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.

Regulatory Findings

    This AD will not have federalism implications under Executive Order 
13132. This AD will 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 that 
this AD. For the reasons discussed above, I certify this AD.
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Will not affect intrastate aviation in Alaska, and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

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

[[Page 3928]]

Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive:

2022-03-07 Stemme AG: Amendment 39-21924; Docket No. FAA-2021-1010; 
Project Identifier MCAI-2020-00807-G.

(a) Effective Date

    This airworthiness directive (AD) is effective March 2, 2022.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Stemme AG TSA-M Model S6 and S6-RT gliders, 
all serial numbers, certificated in any category, with a propeller 
gearbox tooth belt marked ``Synchroforce Carbon'' installed.

(d) Subject

    Joint Aircraft System Component (JASC) Code 6100, Propeller 
System.

(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 a new version of 
the propeller gearbox tooth belt with a reduced life limit. The FAA 
is issuing this AD to prevent a propeller gearbox tooth belt 
remaining in service beyond its fatigue life. The unsafe condition, 
if not addressed, could result in failure of the propeller gearbox 
tooth belt and reduced control of the glider.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions

    Before the propeller gearbox tooth belt accumulates 5 years 
since installation on a glider or within 30 days after the effective 
date of this AD, whichever occurs later, and thereafter at intervals 
not to exceed 5 years, remove the propeller gearbox tooth belt from 
service and install a propeller gearbox tooth belt with 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 (i)(1) of this AD 
and email to: [email protected].
    (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) 329-4165; email: 
[email protected].
    (2) Refer to European Union Aviation Safety Agency (EASA) AD 
2020-0140, dated June 23, 2020, for more information. You may 
examine the EASA AD in the AD docket at https://www.regulations.gov 
by searching for and locating Docket No. FAA-2021-1010.

(j) Material Incorporated by Reference

    None.

    Issued on January 20, 2022.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2022-01479 Filed 1-25-22; 8:45 am]
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