| 2016-17-08 | Elevator Tab Control System | Sep 12, 2016 | Airframe (421C) |
| 2005-20-25 | The Cessna Aircraft Company Models 401, 401A, 401B, 402, 402A, 402B, 402C, 404, 411… | Nov 9, 2005 | Airframe (421C)Certain serial numbers: 401 655; 401 401-0001–401-0322; 401A 655; 401A 401A0001–401A0132; 401B 401B0001–401B0221; 402 402-0001–402-0322; …. Only with: Equipped with an avionics bus circuit breaker switch P/N CM3589-50, 593-250-101, 593-250-102, W31-X2M5A-50, or W31-X1000-50. |
| 2001-22-07 | Honeywell International, Inc. LTP 101 Series Turboprop and LTS101 Series Turboshaft… | Nov 30, 2001 | Engine (LTP 101-600)Only with: Rigid tube fuel manifolds P/N 4-301-042-02, -04, -05, -06, 4-301-236-01, -02, -03, -04, 4-301-286-01, -02, or 4-301-376-01 installed. |
| 2000-01-16 | Cessna Aircraft Company 300 and 400 Series Airplanes | Feb 15, 2000 | Airframe (421C) |
| 98-04-28 | Cessna Aircraft Company Models T303, 310R, T310R, 335, 340A, 402B, 402C, 404, F406, 414… | Mar 13, 1998 | Airframe (421C) |