| Business | Phone |
| Aero Northwest 6947 Coal Creek Pkwy Se 900, Renton 98059 | (425) 228-4787 |
| Aim Aviation Inc 849 Seneca Ave Sw, Renton 98057 | (425) 235-2750 |
| Aviation Technology & Resource 16420 148th Ave Se, Renton 98058 | (425) 271-4747 |
| Harper Engineering Co 200 S Tobin St, Renton 98057 | (425) 255-0414 |