| PAS2311330-2L | Left Hand Inner Pane Cabin Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| PAS2311330-2R | Right Hand Inner Pane Cabin Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| PAS25-8FN353-43A | L/H Panel Assembly Windscreen C | Perkins Aircraft Svc Inc (formerly Westbase) | — | 25 | Interior / Furnishings | PMA |
| PAS25-8FN353-44A | R/H Panel Assembly Windscreen C | Perkins Aircraft Svc Inc (formerly Westbase) | — | 25 | Interior / Furnishings | PMA |
| PAS45AS31003-13 | Cabin Window Inner Pane | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS45AS31003-15 | Cabin Window Inner Pane | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS45AS31003-19 | Cabin Window Outer Panes | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS4AS3420000-503 | Cabin Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS50-420066-437 | D Side Window Oversized | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS50-420066-438 | D Side Window Oversized | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS5111603-5 | Window-Foul Weather LH | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structural / Airframe | PMA |
| PAS5111603-6 | Window-Foul Weather RH | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structural / Airframe | PMA |
| PAS5111604-203 | Non Heated Windshield Left Hand | Perkins Aircraft Svc Inc (formerly Westbase) | | 20 | Consumables / Hardware | PMA |
| PAS5111604-204 | Non Heated Windshield Right Hand | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Windows | PMA |
| PAS5111605-10 | Window-Medium RH 4th Position Cabin | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structural / Airframe | PMA |
| PAS5111605-13 | Window-Small LH Aft Cabin | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS5111605-14 | Window-Small RH Aft Cabin | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS5111605-2 | Window-Large LH and RH Forward Five Cabin and Escape Hatch RH | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structural / Airframe | PMA |
| PAS5111605-3 | Window Cockpit LH Pilot Side | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structural / Airframe | PMA |
| PAS5111605-4 | Window Cockpit RH Co-Pilot Side | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS5111605-9 | Window-Medium LH 4th Position Cabin | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS5511285-3 | Side Cockpit Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS5511285-47 | Side Cockpit Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS5511285-48 | Side Cockpit Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 20 | Consumables / Hardware | PMA |
| PAS5511285-5 | Side Cockpit Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS5511285-6 | Side Cockpit Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS601R31056-1 | Passenger Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| PAS65-38210-17 | number 3 Cockpit Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-38210-18 | number 3 Cockpit Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-38210-19 | number 3 Cockpit Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-38210-20 | number 3 Cockpit Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-45791-1 | Pane, Outer Pass. Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-45791-2 | Pane, Outer Pass. Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-45791-3 | Pane, Outer Pass. Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-45791-4 | Pane, Outer Pass. Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-45792-1 | Pane, Middle Pass. Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-45792-2 | Pane, Middle Pass. Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-45792-3 | Pane, Middle Pass. Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-45792-4 | Pane, Middle Pass. Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS65-45792-5 | Pane, Middle Pass. Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS6600402-2 | Co-Pilots Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| PAS6600403-4 | Pilots Openable Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| PAS6600404-8 | Windshield | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| PAS6600405-10 | Cabin Window Assembly | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| PAS6600405A-8 | Emergency Exit/Baggage Door Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| PAS6600405A-8U | Undrilled Emergency Exit/Baggage Door Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 20 | Consumables / Hardware | PMA |
| PAS6600405A-9 | Aft Cabin Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| PAS6600405A-9U | Undrilled Aft Cabin Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 20 | Consumables / Hardware | PMA |
| PAS7256100-501 | Windshield, Heated | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| PAS7256100-502 | Windshield, Heated | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |