| Business | Phone |
| Flight Dynamics Inc 900 Airport Rd, West Chester 19380 | (610) 429-9650 |
| Mertz Aero Svc Inc 1229 Wrights Ln, West Chester 19380 | (610) 696-9030 |
| Hjc East 1209 Ward Ave, West Chester 19380 | (610) 430-8097 |
| Keystone Helicopter Corp 1420 Phoenixville Pike, West Chester 19380 | (610) 644-4430 |