2022-01-09: Powerplant System

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2022-01-09 Stemme AG: Amendment 39-21897; Docket No. FAA-2021-1175; Project Identifier MCAI-2021-01409-G. (a) Effective Date This airworthiness directive (AD) is effective January 27, 2022. (b) Affected ADs None. (c) Applicability This AD applies to Stemme AG Model Stemme S 10-VT and Stemme S 12 gliders, all serial numbers, certificated in any category, with a freewheel clutch part number (P/N) 12AK with a serial number(S/N) starting with "12-" installed. Note 1 to paragraph (c): Stemme Service Bulletin Doc. No. P062-980058, Revision 1, dated December 14, 2021, contains guidance for identifying the S/N of a P/N 12AK freewheel clutch. (d) Subject Joint Aircraft System Component (JASC) Code 7100, Powerplant System. (e) Unsafe Condition This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI identifies the unsafe condition as unintended slipping of the freewheel clutch with overheating (burnishing) of the friction pads inside of the clutch. The unsafe condition, if not addressed, could result in a loss of thrust and consequent loss of glider control. (f) Required Action and Compliance (1) Before further flight after the effective date of this AD, remove the freewheel clutch from service. (2) As of the effective date of this AD, do not install a freewheel clutch P/N 12AK with an S/N starting with "12-" on any glider. (g) 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 (h)(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. (h) 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; fax: (816) 329-4090; email: [email protected] . (2) Refer to European Union Aviation Safety Agency (EASA) AD 2021-0278-E, dated December 15, 2021, 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-2021-1175. (3) For service information identified in this AD, 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. (i) Material Incorporated by Reference None. Issued on January 4, 2022. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022-00348 Filed 1-11-22; 8:45 am]BILLING CODE 4910-13-P