| 2005-23-03 | Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B… | Dec 19, 2005 | Airframe (23)Certain serial numbers: 23-003–23-099; 24-100–24-284; 25-003–25-153 |
| 2005-23-06 | Learjet Model 23, 24, 24A, 24B, 24B-A, 24D, 24D-A, 24E, 24F, 25, 25A, 25B, 25C, 25D, and… | Dec 19, 2005 | Airframe (23)Only with: Modified by STC SA1731SW, SA1669SW, or SA1670SW and equipped with Nordam (formerly Dee Howard Company) thrust reverser accumulators P/N 25-0570-127-1, -3, -7, -13, or -17. |
| 2005-16-09 | Learjet Model 23, 24, 25, 35, and 36 Airplanes | Sep 13, 2005 | Airframe (23)Certain serial numbers: 23 23-003–23-090; 24 24-100–24-357; 25 25-002–25-373; 35 35-002–35-676; 36 36-002–36-063 |
| 2005-13-36 | Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B… | Aug 9, 2005 | Airframe (23)Serial numbers per Bombardier Alert Service Bulletins A23/24/25-27-17, A28/29-27-24, A31-27-25, A35/36-27-42 (Table 1 of this AD) |
| 2001-07-11 | Learjet Model 23, 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes | May 1, 2001 | Airframe (23) |