| 2005-19-11 | Lycoming Engines (Formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, LO-360… | Oct 21, 2005 | Engine (AEIO-540 SER)Only with: Engines rated at 300 HP or lower, manufactured new, rebuilt, or overhauled after March 1, 1999, or that had a crankshaft installed after March 1, 1999. |
| 2004-05-24 | Lycoming Engines (Formerly Textron Lycoming) AEIO-540, IO-540, LTIO-540, O-540, and… | Mar 30, 2004 | Engine (AEIO-540 SER)Only with: Engines with crankshaft gear retaining bolts P/N STD-2209 installed; excludes O-540-F series engines subject to AD 99-03-05 with bolt not since replaced, engines with bolt installed at original assembly or replaced by Lycoming per SB 554 after November 10, 1998, engines with bolt from replacement kits 05K19987, 05K23325, 05K23326, 05K23327, 05K23335 or 05K23336, and engines with single-drive dual magnetos. |
| 96-12-03 R2 | Aviat Aircraft, Inc. Models S-1S, S-1T, S-2, S-2A, S-2S, and S-2B Airplanes | Nov 20, 1998 | Airframe (S-2B)Certain serial numbers: S-2B 5000–5336. Only with: Equipped with aft lower fuselage wing attach fittings P/N 76090, 2-2107-1, or 1-210-102 not modified on both wings per Aviat SB No. 25 (any revision). |
| 97-26-20 | Aviat Aircraft Inc. Models S-2A, S-2B, and S-2S Airplanes (formerly Pitts Models S-2A… | Jan 22, 1998 | Airframe (S-2B)Certain serial numbers: S-2B 5000–5350 |
| 97-17-07 | Aviat Aircraft, Inc. Models S-1S, S-1T, S-2, S-2A, S-2S, and S-2B Airplanes (Formerly… | Oct 3, 1997 | Airframe (S-2B)Certain serial numbers: S-2B 5000–5348. Only with: Equipped with aft lower fuselage wing attach fittings P/N 76090, 2-2107-1, or 1-210-102 on both wings not modified per Aviat SB No. 25. |