| WB 206-600-2B | R/H Forward Wedge Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206-600-2L | R/H Forward Wedge Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206-663-1 | L/H Aft Wedge Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206-663-2 | R/H Aft Wedge Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206-663-3 | L/H Aft Wedge Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206-663-4 | R/H Aft Wedge Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206A-500-1 | L/H Forward A Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206A-500-2 | R/H Forward A Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206A-500-5 | L/H Forward A Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206A-500-6 | R/H Foward A Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206A-501-1 | L/H Aft A Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206A-501-2 | R/H Aft A Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206A-501-5 | L/H Aft A Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206A-501-6 | R/H Aft A Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206B-500-1 | L/H Forward B Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206B-500-2 | R/H Forward B Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206B-500-5 | L/H Forward B Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206B-500-6 | R/H Forward B Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206B-501-1 | L/H Aft B Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206B-501-2 | R/H Aft B Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206B-501-5 | L/H Aft B Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206B-501-6 | R/H Aft B Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206L-610-1 | L/H Forward L Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206L-610-2 | R/H Forward L Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206L-610-5 | L/H Forward L Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206L-610-6 | R/H Forward L Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206L-611-1 | L/H Aft L Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206L-611-2 | R/H Aft L Window | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206L-611-5 | L/H Aft L Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB 206L-611-6 | R/H Aft L Slide | Perkins Aircraft Svc Inc (formerly Westbase) | | 56 | Structures | PMA |
| WB-HS-125-1-1 | Panel Assembly | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB-HS-125-1-3 | Outer Panel Assembly | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB-HS-125-1-5 | Inner Panel | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB1379595C1 | Outer Pane Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB1379595C3 | Outer Pane Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB137959C1 | Outer Pane Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB137959C3 | Outer Pane Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB26-21195-1 | Center Windshield | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB26-21195-3 | Center Windshield | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB26-21195-9001 | Center Windshield | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB26-21383-10 | Window Inner & Outer Side Cockpit | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB26-21383-7 | Window Inner & Outer Side Cockpit | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB26-21383-8 | Window Inner & Outer Side Cockpit | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB26-21383-9 | Window Inner & Outer Side Cockpit | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB26-22039-5 | Cabin Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB26-22039-9 | Cabin Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB26-22191-9 | Cabin Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB265-300050-71 | Panel Acrylic Window Fuselage Station 225 & 281 | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB265-300050-91 | Panel Acrylic Window Fuselage Station 225 & 281 | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |
| WB27-22180-3 | Pane Cabin Window | Perkins Aircraft Svc Inc (formerly Westbase) | — | 56 | Structures | PMA |