Safety Publications Tool

US-2026-17-10 : Reciprocating Engine - Piston Pin - Replacement

Number US-2026-17-10
Issued by United States of America  United States of America
Issue date 2026-08-31
Effective date 2026-09-14
EASA approval number
ATA Chapter 85
Approval Holder
/ Type Designation
  • LYCOMING ENGINES
    • IO-540
      • IO-540-A1A5
      • IO-540-AA1A5
      • IO-540-AA1B5
      • IO-540-AB1A5
      • IO-540-AC1A5
      • IO-540-AE1A5
      • IO-540-AF1A5
      • IO-540-AG1A5
      • IO-540-B1A5
      • IO-540-B1B5
      • IO-540-B1C5
      • IO-540-C1B5
      • IO-540-C1C5
      • IO-540-C2C
      • IO-540-C4B5
      • IO-540-C4B5D
      • IO-540-C4C5
      • IO-540-C4D5
      • IO-540-C4D5D
      • IO-540-D4A5
      • IO-540-D4B5
      • IO-540-D4C5
      • IO-540-E1A5
      • IO-540-E1B5
      • IO-540-E1C5
      • IO-540-G1A5
      • IO-540-G1B5
      • IO-540-G1C5
      • IO-540-G1D5
      • IO-540-G1E5
      • IO-540-G1F5
      • IO-540-J4A5
      • IO-540-K1A5
      • IO-540-K1A5D
      • IO-540-K1B5
      • IO-540-K1B5D
      • IO-540-K1C5
      • IO-540-K1D5
      • IO-540-K1E5
      • IO-540-K1E5D
      • IO-540-K1F5
      • IO-540-K1F5D
      • IO-540-K1G5
      • IO-540-K1G5D
      • IO-540-K1H5
      • IO-540-K1J5
      • IO-540-K1J5D
      • IO-540-K1K5
      • IO-540-K2A5
      • IO-540-L1A5
      • IO-540-L1A5D
      • IO-540-L1B5D
      • IO-540-L1C5
      • IO-540-M1A5
      • IO-540-M1A5D
      • IO-540-M1B5D
      • IO-540-M1C5
      • IO-540-M2A5D
      • IO-540-N1A5
      • IO-540-P1A5
      • IO-540-R1A5
      • IO-540-S1A5
      • IO-540-T4A5D
      • IO-540-T4B5
      • IO-540-T4B5D
      • IO-540-T4C5D
      • IO-540-U1A5D
      • IO-540-U1B5D
      • IO-540-V4A5
      • IO-540-V4A5D
      • IO-540-W1A5
      • IO-540-W1A5D
      • IO-540-W3A5D
    • O-235
      • O-235
      • O-235-A
      • O-235-AP
      • O-235-B
      • O-235-BP
      • O-235-C
      • O-235-C1
      • O-235-C1A
      • O-235-C1B
      • O-235-C1C
      • O-235-C2A
      • O-235-C2B
      • O-235-C2C
      • O-235-E1
      • O-235-E1B
      • O-235-E2A
      • O-235-E2B
      • O-235-F1
      • O-235-F1B
      • O-235-F2A
      • O-235-F2B
      • O-235-G1
      • O-235-G1B
      • O-235-G2A
      • O-235-G2B
      • O-235-H2C
      • O-235-J2A
      • O-235-J2B
      • O-235-K2A
      • O-235-K2B
      • O-235-K2C
      • O-235-L2A
      • O-235-L2C
      • O-235-M1
      • O-235-M2C
      • O-235-M3C
      • O-235-N2A
      • O-235-N2C
      • O-235-P1
      • O-235-P2A
      • O-235-P2C
      • O-235-P3C
    • O-540
      • O-540-A1A
      • O-540-A1A5
      • O-540-A1B5
      • O-540-A1C5
      • O-540-A1D
      • O-540-A1D5
      • O-540-A2B
      • O-540-A3D5
      • O-540-A4A5
      • O-540-A4B5
      • O-540-A4C5
      • O-540-A4D5
      • O-540-A4E5
      • O-540-B1A5
      • O-540-B1B5
      • O-540-B1D5
      • O-540-B2A5
      • O-540-B2B5
      • O-540-B2C5
      • O-540-B4A5
      • O-540-B4B5
      • O-540-D1A5
      • O-540-E4A5
      • O-540-E4B5
      • O-540-E4C5
      • O-540-F1A5
      • O-540-F1B5
      • O-540-G1A5
      • O-540-G2A5
      • O-540-H1A5
      • O-540-H1A5D
      • O-540-H1B5D
      • O-540-H2A5
      • O-540-H2A5D
      • O-540-H2B5D
      • O-540-J1A5D
      • O-540-J1B5D
      • O-540-J1C5D
      • O-540-J1D5D
      • O-540-J2A5D
      • O-540-J2B5D
      • O-540-J2C5D
      • O-540-J2D5D
      • O-540-J3A5
      • O-540-J3A5D
      • O-540-J3C5D
      • O-540-L3C5D
Revision Not applicable
Correction Not applicable
Supersedure None
Publication(s) and related information (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) Lycoming Mandatory Service Bulletin No. 667A, dated 12 March 2026. (ii) Lycoming Service Instruction No. 1009BE, dated 24 April 2020. (3) For Lycoming material identified in this AD, contact Lycoming Engines, 652 Oliver Street, Williamsport, PA 17701; phone: (800) 258-3279; website: lycoming[dot]com/contact/knowledge-base/publications.
Remarks This AD is considered adopted in accordance with the provisions of ED Decision 2019/018/ED; the ED Decision is available at this link: https://www.easa.europa.eu/en/document-library/agency-decisions/ed-decision-2019018ed. Comments regarding this (E)AD should be referred to the Safety Information Section, Certification Directorate, EASA; E-mail: ADs[at]easa.europa.eu.

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