| 001030-101 | Command Switch Unit | Butler National Corporation | — | 20 | Consumables / Hardware | PMA |
| 001031-101 | Inertial Nav. Sys. Switch Unit | Butler National Corporation | — | 20 | Consumables / Hardware | PMA |
| 001032-101 | VHF AUX Nav. Switch Unit | Butler National Corporation | — | 34 | Avionics | PMA |
| 001033-101 | Compass Switch Unit | Butler National Corporation | — | 34 | Avionics | PMA |
| 001034-101 | RAD/INS Switch Unit | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 001036-101 | Azimuth Switch Unit | Butler National Corporation | — | 34 | Avionics | PMA |
| 001037-101 | CADC Switch Unit | Butler National Corporation | — | 20 | Consumables / Hardware | PMA |
| 001045-101 | INS Switch Unit | Butler National Corporation | — | 20 | Consumables / Hardware | PMA |
| 001046-101 | HSI Switch Unit | Butler National Corporation | — | 34 | Avionics | PMA |
| 001047-101 | ILS Switch Unit | Butler National Corporation | — | 20 | Consumables / Hardware | PMA |
| 001091-101 | Instrument Switch Unit | Butler National Corporation | — | 34 | Avionics | PMA |
| 001091-102 | Instrument Switch Unit | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 001123-101 | Switch Unit | Butler National Corporation | | 34 | Avionics | PMA |
| 001149-101 | Switch Unit | Butler National Corporation | | 34 | Avionics | PMA |
| 10100111 | Transient Suppression Device (TSD) | Butler National Corporation | | 28 | Fuel System | PMA |
| 10100112 | Transient Suppression Device (TSD) | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 10100221 | Transient Suppression Device (TSD) | Butler National Corporation | | 24 | Electromechanical | PMA |
| 10100222 | Transient Suppression Device (TSD) | Butler National Corporation | | 24 | Electrical | PMA |
| 600905-101 | Signal Switch Unit | Butler National Corporation | | 34 | Avionics | PMA |
| 600916-101 | Nav. Switch Unit | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 600916-103 | Nav. Switch Unit | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 600916-104 | Nav. Switch Unit | Butler National Corporation | | 34 | Avionics | PMA |
| 600916-105 | Nav. Switch Unit | Butler National Corporation | | 34 | Avionics | PMA |
| 600917-101 | Compass Switch Unit | Butler National Corporation | | 34 | Avionics | PMA |
| 600918-101 | Gyro Switch Unit | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 600921-100 | Nav. Inst. Switch Unit | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 600930-101 | Hermetic Sealed Switch Unit | Butler National Corporation | | 34 | Avionics | PMA |
| 840037-108 | Transient Suppression Device (TSD) | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 840037-112 | Transient Suppression Device (TSD) | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 840037-113 | Transient Suppression Device (TSD) | Butler National Corporation | | 28 | Fuel System | PMA |
| 840147-1 | TSD Adapter Plate, Wing Tank | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 840147-108 | Transient Suppression Device (TSD) | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 840147-112 | Transient Suppression Device (TSD) | Butler National Corporation | | 28 | Fuel System | PMA |
| 840147-113 | Transient Suppression Device (TSD) | Butler National Corporation | | 28 | Fuel System | PMA |
| 840147-119 | TSD Adapter Plate, Center Tank | Butler National Corporation | | 28 | Fuel System | PMA |
| 840147-23 | TSD Housing, Connector Housing, Nut | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 840147-25 | TSD Installation, Mounting Gusset, Center Tank | Butler National Corporation | | 28 | Fuel System | PMA |
| 840147-27 | TSD Installation, Mounting Gusset, Wing Tank | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| 840147-28 | TSD Installation, Mounting Gusset, Wing Tank | Butler National Corporation | | 20 | Consumables / Hardware | PMA |
| SA1328SO | — | Butler National Corporation | — | — | unknown | OEM |
| SA1666SW | — | Butler National Corporation | — | — | unknown | OEM |
| SA1788SW | — | Butler National Corporation | — | — | unknown | OEM |
| SA1806SW | — | Butler National Corporation | — | — | unknown | OEM |
| SA704CE | — | Butler National Corporation | — | — | unknown | OEM |
| SA849SO | — | Butler National Corporation | — | — | unknown | OEM |
| SA875SW | — | Butler National Corporation | — | — | unknown | OEM |
| ST00846SE | — | Butler National Corporation | | — | unknown | OEM |
| ST01138DE | — | Butler National Corporation | — | — | unknown | OEM |
| ST01160SE | — | Butler National Corporation | | — | unknown | OEM |
| ST01733WI | — | Butler National Corporation | — | — | unknown | OEM |