AD 73-23-01

This AD applies to Lycoming Engines, Textron Lycoming, AVCO Corporation AIO-360-A1A, AIO-360-A1B, AIO-360-A2A, AIO-360-A2B, AIO-360-B1B, GO-480-G1D6, HIO-360-A1A, HIO-360-B1A, HIO-360-B1B, HIO-360-C1A, HIO-360-C1B, HIO-360-D1A, IGO-540-A1A, IGO-540-A1B, IGO-540-A1C, IGO-540-B1A, IGO-540-B1B, IGO-540-B1C, IGSO-480-A1E6, IGSO-540-A1A, IGSO-540-A1C, IGSO-540-A1D, IGSO-540-A1E, IGSO-540-A1F, IGSO-540-B1A, IGSO-540-B1C, IO-320-A1A, IO-320-A2A, IO-320-B1A, IO-320-B1B, IO-320-B1C, IO-320-B1D, IO-320-B2A, IO-320-C1A, IO-320-D1A, IO-320-D1B, IO-320-E1A, IO-320-E2A, IO-320-E2B, IO-360-A1A, IO-360-A1B, IO-360-A1B6, IO-360-A1B6D, IO-360-A1C, IO-360-A1D, IO-360-A1D6, IO-360-A2A, IO-360-A2B, IO-360-A2C, IO-360-B1A, IO-360-B1B, IO-360-B1C, IO-360-B1D, IO-360-B1E, IO-360-B1F, IO-360-B1F6, IO-360-B2E, IO-360-B2F, IO-360-B2F6, IO-360-B4A, IO-360-C1A, IO-360-C1B, IO-360-C1C, IO-360-C1D6, IO-360-C1F, IO-360-D1A, IO-360-E1A, IO-360-F1A, IO-540-A1A5, IO-540-B1A5, IO-540-C4B5, IO-540-D4A5, IO-540-E1A5, IO-540-E1B5, IO-540-G1D5, IO-540-J4A5, IO-540-K1A5, IO-540-K1B5, IO-540-K1C5, IO-540-K1E5, IO-540-K1E5D, LIO-360-C1E6, O-320-A1A, O-320-A1B, O-320-A2A, O-320-A2B, O-320-A2C, O-320-A2D, O-320-A3A, O-320-A3B, O-320-A3C, O-320-B1A, O-320-B1B, O-320-B2A, O-320-B2B, O-320-B2C, O-320-B3A, O-320-B3B, O-320-B3C, O-320-C1A, O-320-C1B, O-320-C2A, O-320-C2B, O-320-C2C, O-320-C3A, O-320-C3B, O-320-C3C, O-320-D1A, O-320-D1B, O-320-D1C, O-320-D1F, O-320-D2A, O-320-D2B, O-320-D2C, O-320-D2F, O-320-E1A, O-320-E1B, O-320-E1C, O-320-E1F, O-320-E2A, O-320-E2B, O-320-E2C, O-320-E2D, O-320-E2F, O-320-E2G, O-320-E2H, O-320-E3D, O-320-E3H, O-360-A1A, O-360-A1C, O-360-A1D, O-360-A1F, O-360-A1F6, O-360-A1F6D, O-360-A1G, O-360-A1G6, O-360-A1H, O-360-A1LD, O-360-A2A, O-360-A2D, O-360-A2E, O-360-A2F, O-360-A2G, O-360-A2H, O-360-A3A, O-360-A3D, O-360-A4A, O-360-A4AD, O-360-A4G, O-360-A4J, O-360-A5AD, O-360-B1A, O-360-B1B, O-360-B2A, O-360-B2B, O-360-C1A, O-360-C1C, O-360-C2A, O-360-C2B, O-360-C2C, O-360-C2D, O-360-D1A, O-360-D2A, O-360-D2B, O-540-A1C5, O-540-A1D5, O-540-B1A5, O-540-B2B5, O-540-B2C5, O-540-B4B5, O-540-E4A5, O-540-E4B5, O-540-E4C5, O-540-G1A5, TIGO-541-B1A, TIGO-541-C1A, TIGO-541-D1A, TIGO-541-E1A, TIGO-541-G1AD, TIO-360-A1A, TIO-360-A1B, TIO-360-A3B6, TIO-360-C1A6D, TIO-540-A2B, TIO-540-A2C, TIO-540-C1A, TIO-540-J2BD, TIO-541-A1A, TIO-541-E1A4, TIO-541-E1B4, TIO-541-E1C4, TIO-541-E1D4, VO-540-A1A, VO-540-A2A, VO-540-B1A, VO-540-B1B, VO-540-B1B3, VO-540-B1C, VO-540-B1D, VO-540-B1E, VO-540-B1F, VO-540-B1H3, VO-540-B2A, VO-540-B2C, VO-540-B2D, VO-540-B2E, VO-540-B2G, VO-540-C1A, VO-540-C1B, VO-540-C1C3, VO-540-C2A, VO-540-C2B, VO-540-C2C, IO-720-A1A, IO-720-A1B, IO-720-B1A, IO-720-B1B, IO-720-D1B.

The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.