2026-07-05: Engine Exhaust 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: 2026-07-05 Costruzioni Aeronautiche Tecnam S.P.A.: Amendment 39-23300; Docket No. FAA-2026-2728; Project Identifier MCAI-2026-00092-A. (a) Effective Date This airworthiness directive (AD) is effective April 20, 2026. (b) Affected ADs None. (c) Applicability This AD applies to Costruzioni Aeronautiche Tecnam S.P.A. (Tecnam) Model P2010 airplanes, up to and including serial number 335, certificated in any category, that are equipped with a Lycoming IO-390 engine (MOD2010/078). (d) Subject Joint Aircraft System Component (JASC) Code 7800, Engine Exhaust System. (e) Unsafe Condition This AD was prompted by a report of unrecoverable loss of engine power. The FAA is issuing this AD to detect and address blockage of the exhaust system due to potential failure of the exhaust muffler flame tube. The unsafe condition, if not addressed, could result in loss of engine power and loss of control of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) Within 25 hours time-in-service (TIS) or 30 days, whichever occurs first after the effective date of this AD, and thereafter, at intervals not to exceed 200 hours TIS, perform a detailed borescope inspection (BSI) of the exhaust muffler flame tube for cracks, fractures, or evidence of crack or fracture initiation, in accordance with Appendix A of the Accomplishment Instructions in TECNAM Service Bulletin (SB) 937-CS-Ed. 2, Rev. 1, dated February 26, 2026 (TECNAM SB 937-CS-Ed. 2, Rev. 1). (2) If any crack, fracture, or evidence of crack or fracture initiation is detected during any BSI required by paragraph (g)(1) of this AD, before further flight, repair using a method approved by the Manager, International Validation Branch, FAA; European Union Aviation Safety Agency (EASA); or Tecnam's EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature. (h) Optional Terminating Action Revising the aircraft maintenance program for your airplane to include TECNAM P2010-Maintenace Manual, Tecnam P2010 AMM Supplement S6, Ed. 2, Rev. 2, dated January 8, 2026, constitutes an acceptable method to comply with the requirements of paragraphs (g)(1) and (2) of this AD. (i) No Reporting Requirement Although TECNAM SB 937-CS-Ed. 2, Rev. 1, specifies to submit information to the manufacturer, this AD does not require that action. (j) Credit for Previous Actions You may take credit for the actions required by paragraphs (g)(1) and (2) of this AD if you performed those actions before the effective date of this AD using TECNAM Service Bulletin SB 937-CS-Ed. 1, Rev. 0, dated September 16, 2025; or TECNAM Service Bulletin SB 937-CS-Ed. 2, Rev. 0, dated January 7, 2026. (k) Special Flight Permits Special flight permits, as described in 14 CFR 21.197 and 21.199, are not allowed. (l) Alternative Methods of Compliance (AMOCs) 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 (m) of this AD and email to AMOC@faa.gov. 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. (m) Additional Information For more information about this AD, contact George Weir, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (817) 222-4045; email: george.a.weir@faa.gov. (n) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) TECNAM Service Bulletin SB 937-CS-Ed. 2, Rev. 1, dated February 26, 2026. (ii) TECNAM P2010-Maintenance Manual, Tecnam P2010 AMM Supplement S6, Ed. 2, Rev. 2, dated January 8, 2026. (3) For TECNAM material identified in this AD, contact Costruzioni Aeronautiche Tecnam S.P.A., Via Maiorise, 81043 Capua CE, Italy; phone: +39 0823 997538; email: technical.support@tecnam.com; website: tecnam.com. (4) You may view this material 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. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email fr.inspection@nara.gov. Issued on March 31, 2026. Christopher R. Parker, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2026-06532 Filed 4-2-26; 8:45 am]BILLING CODE 4910-13-P