Airworthiness Directives (ADs)
CAA-2026-09-001
The aircraft owner or operator shall comply with Airworthiness Directives issued by the CAA or the aeronautics authority of the State of Design (SoD) of the aviation products, appliances and parts, and take all necessary actions thereto.
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Issue Date
- 2026/09/09
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Applicability
- This AD applies to Lycoming Engines Model O-235, -A, -AP, -B, -BP, -C, -C1, -C1A, -C1B, -C1C, -C2A, -C2B, -C2C, -E1, -E1B, -E2A, -E2B, -F1, -F1B, -F2A, -F2B, -G1, -G1B, O-235-G2A, O-235-G2B,O-235-H2C, O-235-J2A, O-235-J2B, O-235-K2A, O-235-K2B, -K2C, -L2A, -L2C, -M1, -M2C, -M3C,-N2A, -N2C, -P1, -P2A, -P2C, and -P3C; O-540-A1A, -A1A5, -A1B5, -A1C5, -A1D, -A1D5, -A2B, -A3D5, -A4A5, -A4B5, -A4C5, -A4D5, -A4E5, -B1A5, -B1B5, -B1D5, -B2A5, -B2B5, -B2C5, -B4A5, -B4B5, -D1A5, -E4A5, -E4B5, -E4C5, -F1A5, -F1B5, -G1A5, -G2A5, -H1A5, -H1A5D, -H1B5D, -H2A5,-H2A5D, -H2B5D, -J1A5D, -J1B5D, -J1C5D, -J1D5D, -J2A5D, -J2B5D, -J2C5D, -J2D5D, -J3A5, -J3A5D, -J3C5D, and -L3C5D; IO-540-A1A5, -AA1A5, -AA1B5, -AB1A5, -AE1A5, -AC1A5, -AF1A5, -B1B5, -AG1A5, -B1A5, -B1C5, -C1B5, -C1C5, -C2C, -C4B5, -C4B5D, -C4C5, -C4D5, -C4D5D, -D4A5, -D4B5, -D4C5, -E1A5, -E1B5, -E1C5, -G1A5, -G1B5, -G1C5, -G1D5, -G1E5, -G1F5, -J4A5, -K1A5, -K1A5D, -K1B5, -K1B5D, -K1C5, -K1D5, -K1E5, -K1E5D, -K1F5, -K1F5D, -K1G5, -K1G5D, -K1H5, -K1J5, -K1J5D, -K1K5, -K2A5, -L1A5, -L1A5D, -L1B5D, -L1C5, -M1A5, -M1A5D, -M1B5D, -M1C5, -M2A5D, -N1A5, -P1A5, -R1A5, -S1A5, -T4A5D, -T4B5, -T4B5D, -T4C5D, -U1A5D, -U1B5D, -V4A5, -V4A5D, -W1A5, -W1A5D, and -W3A5D engines with a serial number listed in Table 2 or Table 3 ofLycoming Mandatory Service Bulletin No. (MSB) 667A, dated March 12, 2026 (Lycoming MSB667A), and an installed piston pin having part number (P/N) LW-13445 with an FAA Form 8130-3from the original equipment manufacturer for production dated between January 7, 2021 toDecember 15, 2025. If the production date on the FAA Form 8130-3 cannot be determined, or if theFAA Form 8130-3 is not available, this AD is applicable.
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Model Number
- Lycoming O-235, O-540,
and IO-540 engines
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CAA AD Number
- CAA-2026-09-001
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Aeronautics Authority of Original AD
- FAA
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Original AD Number
- 2026-17-10
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Effective Date
- 2026/09/14
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Subject
- This AD requires replacement of the affected piston pin with apart eligible for installation and, for certain engines, oil change and visual inspection of the engineoil filter, oil pressure screen, and oil suction screen for metal particulates.
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Reference Publications (Revision/ATA/SB)
- Ref. Lycoming Mandatory Service Bulletin No. 667A, dated March 12, 2026.
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Remarks
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Download
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