| 4009534-0501 | FCS-810 Automatic Flight Control System Installation Kit | Honeywell International Inc | Current | 1999-12-01 |
| 4009534-0502 | FCS-810 Automatic Flight Control System Installation Kit | Honeywell International Inc | Current | 1999-12-01 |
| 4009534-0503 | FCS-810 Automatic Flight Control System Installation Kit | Honeywell International Inc | Current | 1999-12-01 |
| 4009536-0501 | M-4D Automatic Flight Control System Installation Kit | Honeywell International Inc | Current | 1999-12-01 |
| 4009543-0501 | M-4D Automatic Flight Control System Installation Kit | Honeywell International Inc | Current | 1999-12-01 |
| 4009548-0501 | FCS-870 with YD Automatic Flight Control System Installation Kit | Honeywell International Inc | Current | 1999-12-01 |
| 4009548-0502 | FCS-870 without YD Automatic Flight Control System Installation Kit | Honeywell International Inc | Current | 1999-12-01 |
| 4009552-0502 | FCS-870 without YD Automatic Flight Control System Installation Kit | Honeywell International Inc | Current | 1999-12-01 |
| 4009563-0501 | FCS-8700 Automatic Flight Control System Installation Kit | Honeywell International Inc | Current | 1999-12-01 |
| 404HE2-6 | Switch | Aviation Technologies Inc | Current | 1995-08-05 |
| 4051 | Vacuum System | Precise Flight Inc | Current | 2000-08-30 |
| 4055 | Vacuum System | Precise Flight Inc | Current | 2000-08-30 |
| 4060-47,4060-48,4060-49,4060-51,4060-52,4060-53 | Passenger service unit | B/E Aerospace Inc | Current | 1998-05-26 |
| 4064-55,4064-56, 4064-57, 4064-58, 4064-59, 4064-60, 4064-61, 4064-62, 4064-63, 4064-64, 4064-65 | Passenger service unit | B/E Aerospace Inc | Current | 1998-05-26 |
| 4064-66, 4064-67, 4064-68, 4064-69, 4064-70, 4064-71, 4064-72, 4064-73 | Passenger service unit | B/E Aerospace Inc | Current | 1998-05-26 |
| 4075-81, -82, -83, -84, -85, -87, -50, -51, -52, -53, -55, -49, -35, -34, -33, -30, -29, 25 | Airvalve Assembly-Cabin | B/E Aerospace Inc | Current | 1998-05-26 |
| 4075-81, 82, 83, 84, 85, 87, 50, 51, 52, 53, 55, 49, 35, 34, 33, 30, 29, 25 | Airvalve Assembly-Cabin | Puritan Bennett Aero Sys - Wemac | Historical | 1995-11-07 |
| 4083X | Radome Kit | Norton Performance Plastics Corp, Composites Operations | Current | 1992-08-24 |
| 4100-849040 | Hydraulic Pump | AeroControlex Group, TransDigm Inc | Current | 1993-12-28 |
| 4109X | Radome Kit | Norton Performance Plastics Corp, Composites Operations | Current | 1992-08-24 |
| 4120-013001 | Hydraulic Pump | AeroControlex Group, TransDigm Inc | Current | 1993-12-28 |
| 4122-008000 | Pump, DC Motor Driven | AeroControlex Group, TransDigm Inc | Current | 1993-12-28 |
| 4122-008001 | Pump, DC Motor Driven | AeroControlex Group, TransDigm Inc | Current | 1993-12-28 |
| 4132X | Radome Kit | Norton Performance Plastics Corp, Composites Operations | Current | 1992-08-24 |
| 4133X | Radome Assembly | Norton Performance Plastics Corp, Composites Operations | Current | 1992-08-24 |
| 4133X | Radar Pod | Norton Performance Plastics Corp, Composites Operations | Current | 1992-08-24 |
| 4140-00-39NVCJ-TAT | Fuel Pump (14V) | CJ Aviation Inc. | Current | 2018-04-02 |
| 4150X-100/200 | Radome Kit | Norton Performance Plastics Corp, Composites Operations | Current | 1992-08-24 |
| 4150X-100/200 | Radome Assembly | Norton Performance Plastics Corp, Composites Operations | Current | 1992-08-24 |
| 4160X | Radome Kit | Norton Performance Plastics Corp, Composites Operations | Current | 1992-08-24 |
| 4222X | Radome Kit | Norton Performance Plastics Corp, Composites Operations | Current | 1992-08-24 |
| 4258-00-15NVCJ-TAT | Fuel Pump (14V) | CJ Aviation Inc. | Current | 2018-04-02 |
| 42702-1 | DMU Tray, Single or Dual Global Wulfsberg Systems (GWS) GNS-X Navigation Management System | Honeywell International Inc | Current | 1999-12-01 |
| 43010-X | DTU Tray, Single or Dual Global Wulfsberg Systems (GWS) GNS-X Navigation Management System | Honeywell International Inc | Current | 1999-12-01 |
| 440000-01 | Digital Wire Harness | Shadin Avionics (name change from Shadin Company 2/28/06) | Historical | 1992-06-15 |
| 440001-01 | Analog Wire Harness | Shadin Avionics (name change from Shadin Company 2/28/06) | Historical | 1992-06-15 |
| 440002-01 | Power Wire Harness | Shadin Avionics (name change from Shadin Company 2/28/06) | Historical | 1992-06-15 |
| 440003-01 | Auxiliary Digital Wire Harness | Shadin Avionics (name change from Shadin Company 2/28/06) | Historical | 1992-06-15 |
| 440004-01 | Auxiliary Analog Wire Harness | Shadin Avionics (name change from Shadin Company 2/28/06) | Historical | 1992-06-15 |
| 450 | Volt Meter | Davtron Inc | Current | 2000-09-06 |
| 4500 (A, AB, AC) -A, -B, -C, -D, -E, -F, -G, -H, -I, -J, -K, -L, -M, -N, -O, -TI, -TA, -TB, -TC, -TD, -TE, -TF, -TG, -TH, -TJ, -TL, -TM, -TN, -TO | TKS Anti-Icing System | CAV Aerospace Inc | Historical | 2008-02-25 |
| 4500(A, AB, AC)-A, -B, -C, -D, -E, -F, -G, -H, -I, -J, -K, -L, -M, -N, -O, -TI, -TA, -TB, -TC, -TD, -TE, -TF, -TG, -TH, -TJ, -TL, -TM, -TN, -TO | TKS Anti-icing System | Aerospace Systems & Technologies Inc | Current | 1999-02-24 |
| 4500S-A1 | Valve & Control Arm Assembly | Scott Aviation | Current | 1992-08-12 |
| 4500S-A1 | Valve & Control Arm Assembly | Scott Aviation (now AVOX Systems, Inc.) | Current | 1992-08-12 |
| 451 | Volt Meter | Davtron Inc | Current | 2000-09-06 |
| 45720 | Jet Pump | Lear Romec Division Crane Co | Current | 1994-05-02 |
| 4613-00-3NVCJ-TAT | Fuel Pump (28V) | CJ Aviation Inc. | Current | 2018-04-02 |
| 4613-00-3NVCJ-TAT | Fuel Pump (28V) | CJ Aviation Inc. | Current | 2018-04-02 |
| 4613-00-5NVCJ-TAT | Fuel Pump (28V) | CJ Aviation Inc. | Current | 2018-04-02 |
| 4613-00-5NVCJ-TAT | Fuel Pump (28V) | CJ Aviation Inc. | Current | 2018-04-02 |