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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: a. Removing Airworthiness Directive 2021-22-20, Amendment 39-21793 (86 FR 60159, November 1, 2021); and b. Adding the following new airworthiness directive: 2022-03-03 Austro Engine GmbH: Amendment 39-21920; Docket No. FAA-2022-0013; Project Identifier MCAI-2021-01371-E. (a) Effective Date This airworthiness directive (AD) is effective February 14, 2022. (b) Affected ADs This AD replaces AD 2021-22-20, Amendment 39-21793 (86 FR 60159, November 1, 2021). (c) Applicability This AD applies to Austro Engine GmbH E4 and E4P model diesel piston engines equipped with either: (1) A cylinder head having part number (P/N) E4A-12-500-000, installed in combination with high-pressure pump (HPP) driving gear P/N E4A-30-000-601 (any revision), P/N E4A-30-000-201 rev. AB.1, or P/N E4A-30-000-201 with a serial number (S/N) listed in Chapter 1.4, Table 1 of Austro Engine Mandatory Service Bulletin No. MSB-E4-036/1, Revision No. 1, dated December 14, 2021 (MSB-E4-036/1); or (2) An HPP driving gear, having P/N E4A-30-000-201, with an S/N listed in Chapter 1.4, Table 1 of Austro Engine MSB-E4-036/1. (d) Subject Joint Aircraft System Component (JASC) Code 8520, Reciprocating Engine Power Section. (e) Unsafe Condition This AD was prompted by reports of failure of the HPP driving gear and a subsequent investigation by the manufacturer, which determined that a certain batch of HPP driving gears may have been damaged during assembly. The investigation also determined that the combination of a certain affected cylinder head installed on an engine with a certain affected HPP driving gear installed on the same engine may cause damage to the HPP driving gear. The FAA is issuing this AD to prevent the failure of the HPP driving gear. The unsafe condition, if not addressed, could result in in-flight engine shut-down, forced landing, and damage to the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) For engines equipped with a cylinder head and HPP driving gear combination identified in paragraph (c)(1) of this AD, before further flight after the effective date of this AD, remove the HPP driving gear and replace it with an HPP driving gear eligible for installation using paragraphs 2.1.1 through 2.1.4., Removal and inspection of the HPP driving gear, of Austro Engine MSB-E4-036/1. (2) Before further flight after performing the required actions in paragraph (g)(1) of this AD, visually inspect the removed HPP driving gear using the criteria in paragraph 7. Appendix II, Table 6, of Austro Engine MSB-E4-036/1. (3) If, based on the visual inspection required by paragraph (g)(2) of this AD, the HPP driving gear does not meet the acceptable condition criteria in paragraph 7. Appendix II, Table 6, of Austro Engine MSB-E4-036/1, before further flight, visually inspect the HPP shaft, cylinder head, camshaft gear, and inlet/outlet camshaft bushing using the criteria in paragraph 7. Appendix II, Table 7, of Austro Engine MSB-E4-036/1. (4) If, based on the visual inspection required by paragraph (g)(3) of this AD, the HPP shaft, cylinder head, camshaft gear, or inlet/outlet camshaft bushing do not meet the acceptable condition criteria in paragraph 7. Appendix II, Table 7, of Austro Engine MSB-E4-036/1, before further flight, remove any part not meeting the acceptable condition criteria and replace with a part eligible for installation. (5) For engines equipped with an affected HPP driving gear identified in paragraph (c)(2) of this AD, within the compliance time specified in Table 1 to paragraph (g)(5) of this AD, as applicable, replace the HPP driving gear with an HPP driving gear eligible for installation. ER28JA22.002 (h) Definitions (1) For the purpose of this AD, an HPP driving gear eligible for installation is: (i) An HPP driving gear that is not identified in paragraph (c)(2) of this AD; or (ii) An HPP driving gear that does not create a cylinder head and HPP driving gear combination identified in paragraph (c)(1) of this AD. (2) For the purpose of this AD, an HPP shaft, cylinder head, camshaft gear, and inlet/outlet camshaft bushing eligible for installation is: (i) An HPP shaft, cylinder head, camshaft gear, and inlet/outlet camshaft bushing that meets the acceptable condition criteria in paragraph 7. Appendix II, Table 7, of Austro Engine MSB-E4-036/1; or (ii) An HPP shaft, cylinder head, camshaft gear, and inlet/outlet camshaft bushing that is a new (zero hour) part. (3) For the purpose of this AD, Engine Group 1 is Austro Engine E4 model engines in configuration "-A" installed on single engine airplanes. (4) For the purpose of this AD, Engine Group 2 is Austro Engine E4 model engines in configuration "-B" or "-C" and Austro Engine E4P model engines installed on twin-engine airplanes. (i) No Reporting Requirement The reporting instructions specified in paragraph 7. Appendix II, Tables 6 and 7, of Austro Engine MSB-E4-036/1 are not required by this AD. (j) Special Flight Permit A special flight permit may be issued in accordance with 14 CFR 21.197 and 21.199 to permit a single ferry flight to a location where the actions required by this AD can be accomplished on a twin-engine airplane that has one or two Austro Engine E4 model engines in configuration "-B" or "-C", or Austro Engine E4P model engines, installed. (k) Alternative Methods of Compliance (AMOCs) (1) The Manager, ECO 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 (l)(1) of this AD. You may email your request to: ANE-AD-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. (l) Related Information (1) For more information about this AD, contact Wego Wang, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238-7134; fax: (781) 238-7199; email: wego.wang@faa.gov . (2) Refer to European Union Aviation Safety Agency (EASA) AD 2021-0274-E, dated December 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 Docket No. FAA-2022-0013. (m) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) 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 the AD specifies otherwise. (i) Austro Engine Mandatory Service Bulletin No. MSB-E4-036/1, Revision No. 1, dated December 14, 2021. (ii) [Reserved] (3) For Austro Engine service information identified in this AD, contact Austro Engine GmbH, Rudolf-Diesel-Strasse 11, 2700 Weiner Neustadt, Austria; phone: +43 2622 23000; website: https://www.austroengine.at. (4) 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 (817) 222-5110. (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 January 19, 2022. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022-01818 Filed 1-26-22; 11:15 am]BILLING CODE 4910-13-P
