| Part Number | Radio Tuning Unit: | 
| 822-0668-001 | 
RTU-4200, Black, On/Off Switch | 
| 822-0668-002 | 
RTU-4200, Gray, On/Off Switch | 
| 822-0668-011 | 
RTU-4200, Black, On/Off Switch | 
| 822-0668-012 | 
RTU-4200, Gray, On/Off Switch | 
| 822-0668-021 | 
RTU-4200, Black, On/Off Switch | 
| 822-0668-022 | 
RTU-4200, Gray, On/Off Switch | 
| 822-0668-031 | 
RTU-4200, Black, On/Off Switch, Flight ID | 
| 822-0668-032 | 
RTU-4200, Gray, On/Off Switch, Flgith ID | 
| 822-0668-101 | 
RTU-4200, Black, On/Off Switch, AIU-4000 required | 
| 822-0668-102 | 
RTU-4200, Gray, On/Off Switch, AIU-4000 required | 
| 822-0668-111 | 
RTU-4200, Black, On/Off Switch, AIU-4000 required | 
| 822-0668-112 | 
RTU-4200, Gray, On/Off Switch, AIU-4000 required | 
| 822-0668-121 | 
RTU-4200, Black, On/Off Switch, AIU-4000 required | 
| 822-0668-122 | 
RTU-4200, Gray, On/Off Switch, AIU-4000 required | 
| 822-0668-131 | 
RTU-4200, Black, On/Off Switch, Flight ID, AIU-4000 required | 
| 822-0668-132 | 
RTU-4200, Gray, On/Off Switch, Flight ID, AIU-4000 required | 
| 822-0668-251 | 
RTU-4200, Black, COM 1 Emer | 
| 822-0668-252 | 
RTU-4200, Gray | 
| 822-0668-254 | 
RTU-4200, Gray | 
| 822-0668-261 | 
RTU-4200, Black, Flight ID, COM 1 Emer | 
| 822-0668-262 | 
RTU-4200, Gray, Flight ID, COM 1 Emer | 
| 822-0668-264 | 
RTU-4200, Gray, Flight ID | 
| 822-0836-001 | 
RTU-4210, Black, TCAS | 
| 822-0836-002 | 
RTU-4210, Gray, TCAS | 
| 822-0836-004 | 
RTU-4210, Gray, On/Off Switch | 
| 822-0836-005 | 
RTU-4210, Black, On/Off Switch, TCAS | 
| 822-0836-006 | 
RTU-4210, Gray, On/Off Switch, TCAS | 
| 822-0836-014 | 
RTU-4210, Gray, On/Off Switch, TCAS | 
| 822-0836-015 | 
RTU-4210, Black, On/Off Switch, TCAS | 
| 822-0836-016 | 
RTU-4210, Gray, On/Off Switch, TCAS | 
| 822-0836-024 | 
RTU-4210, Gray, On/Off Switch, TCAS | 
| 822-0836-025 | 
RTU-4210, Black, On/Off Switch, TCAS | 
| 822-0836-026 | 
RTU-4210, Gray, On/Off Switch, TCAS | 
| 822-0836-034 | 
RTU-4210, Gray, On/Off Switch, Flight ID, TCAS | 
| 822-0836-035 | 
RTU-4210, Black, On/Off Switch, Flight ID, TCAS | 
| 822-0836-036 | 
RTU-4210, Gray, On/Off Switch, Flight ID, TCAS | 
| 822-0836-102 | 
RTU-4210, Gray | 
| 822-0836-103 | 
RTU-4210, Black, On/Off Switch, TCAS, AIU-4000 required | 
| 822-0836-104 | 
RTU-4210, Gray, On/Off Switch, TCAS, AIU-4000 required | 
| 822-0836-113 | 
RTU-4210, Black, On/Off Switch, TCAS, AIU-4000 required | 
| 822-0836-114 | 
RTU-4210, Gray, On/Off Switch, TCAS, AIU-4000 required | 
| 822-0836-123 | 
RTU-4210, Black, On/Off Switch, TCAS, AIU-4000 required | 
| 822-0836-124 | 
RTU-4210, Gray, On/Off Switch, TCAS, AIU-4000 required | 
| 822-0836-133 | 
RTU-4210, Black, On/Off Switch, Flight ID, TCAS, AIU-4000 required | 
| 822-0836-134 | 
RTU-4210, Gray, On/Off Switch, Flight ID, TCAS, AIU-4000 required | 
| 822-0836-203 | 
RTU-4210, Black, On/Off Switch, TCAS, HF9000 Single, COM 3 | 
| 822-0836-204 | 
RTU-4210, Gray, On/Off Switch, TCAS, HF9000 Single, COM 3 | 
| 822-0836-213 | 
RTU-4210, Black, On/Off Switch, TCAS, HF9000 Single, COM 3 | 
| 822-0836-214 | 
RTU-4210, Gray, On/Off Switch, TCAS, HF9000 Single, COM 3 | 
| 822-0836-223 | 
RTU-4210, Black, On/Off Switch, TCAS, HF9000 Single, COM 3 | 
| 822-0836-224 | 
RTU-4210, Gray, On/Off Switch, TCAS, HF9000 Single, COM 3 | 
| 822-0836-233 | 
RTU-4210, Black, On/Off Switch, Flgiht ID, TCAS, HF9000 Single, COM 3 | 
| 822-0836-234 | 
RTU-4210, Gray, On/Off Switch, Flight ID, TCAS, HF9000 Single, COM 3 | 
| 822-0836-303 | 
RTU-4210, Black, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3 | 
| 822-0836-304 | 
RTU-4210, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3 | 
| 822-0836-313 | 
RTU-4210, Black, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3 | 
| 822-0836-314 | 
RTU-4210, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3 | 
| 822-0836-323 | 
RTU-4210, Black, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3 | 
| 822-0836-324 | 
RTU-4210, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3 | 
| 822-0836-333 | 
RTU-4210, Black, On/Off Switch, Flight ID, TCAS, AIU-4000 required, HF9000 Single, COM 3 | 
| 822-0836-334 | 
RTU-4210, Gray, On/Off Switch, Flgiht ID, TCAS, AIU-4000 required, HF9000 Single, COM 3 | 
| 822-0836-434 | 
RTU-4210, Gray, On/Off Switch, Flight ID, COM 1 Emer, TCAS, AIU-4000 required, HF9000 Single, COM 3 | 
| 822-0730-001 | 
RTU-4220, Black, On/Off Switch, TCAS, HF9000 Single, COM 3, HSI | 
| 822-0730-002 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-011 | 
RTU-4220, Black, On/Off Switch, TCAS, HF9000 Single, COM 3, HSI | 
| 822-0730-012 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-021 | 
RTU-4220, Black, On/Off Switch, TCAS, HF9000 Single, COM 3, HSI | 
| 822-0730-022 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-031 | 
RTU-4220, Black, On/Off Switch, Flight ID, TCAS, HF9000 Single, COM 3, HSI | 
| 822-0730-032 | 
RTU-4220, Gray, On/Off Switch, Flight ID, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-101 | 
RTU-4220, Black, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-102 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-111 | 
RTU-4220, Black, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-112 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-121 | 
RTU-4220, Black, On/Off Switch, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-131 | 
RTU-4220, Black, On/Off Switch, Flight ID, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-132 | 
RTU-4220, Gray, On/Off Switch, Flight ID, TCAS, AIU-4000 required, HF9000 Single, COM 3, HSI | 
| 822-0730-201 | 
RTU-4220, Black, On/Off Switch, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-202 | 
RTU-4220, Gray, On/Off Switch, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-204 | 
RTU-4220, Gray, On/Off Switch, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-211 | 
RTU-4220, Black, On/Off Switch, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-212 | 
RTU-4220, Gray, On/Off Switch, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-214 | 
RTU-4220, Gray, On/Off Switch, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-221 | 
RTU-4220, Black, On/Off Switch, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-222 | 
RTU-4220, Gray, On/Off Switch, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-224 | 
RTU-4220, Gray, On/Off Switch, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-231 | 
RTU-4220, Black, On/Off Switch, Flight ID, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-232 | 
RTU-4220, Gray, On/Off Switch, Flight ID, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-234 | 
RTU-4220, Gray, On/Off Switch, Flight ID, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-301 | 
RTU-4220, Black, On/Off Switch, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-302 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-304 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-311 | 
RTU-4220, Black, On/Off Switch, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-312 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-314 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-321 | 
RTU-4220, Black, On/Off Switch, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-322 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-324 | 
RTU-4220, Gray, On/Off Switch, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-331 | 
RTU-4220, Black, On/Off Switch, Flight ID, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-332 | 
RTU-4220, Gray, On/Off Switch, Flight ID, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-334 | 
RTU-4220, Gray, On/Off Switch, Flight ID, TCAS, AIU-4000 required, HF9000 Dual, COM 3, HSI | 
| 822-0730-451 | 
RTU-4220, Black, On/Off Switch, COM 1 Emer, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-452 | 
RTU-4220, Gray | 
| 822-0730-454 | 
RTU-4220, Gray, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-461 | 
RTU-4220, Black, Flight ID, COM 1 Emer, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-462 | 
RTU-4220, Gray, Flight ID, COM 1 Emer, TCAS, HF9000 Dual, COM 3, HSI | 
| 822-0730-464 | 
RTU-4220, Gray, Flight ID, TCAS, HF9000 Dual, COM 3, HSI |