ST00678WI-D
Modification of Collins VHF/22A/VHF-22B/VHF-422AVHF-422B VHF COMM Receiver Transmitter with RTU-4200/RTU-4220 radio tune unit Pro Line II system installation to a Collins VHF-22C/VHF-22D/VHF-422C/VHF-422D VHF COMM Receiver Transmitter with RTU-4200/RTU-4210/RTU-4220 Radio Tune Unit 8.33 kHz Pro Line II System. Held by Rockwell Collins INC, which holds 359 approved modifications in all. Last revised May 14, 1999. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Cessna Aircraft Company; Dassault-Aviation; Gulfstream Aerospace Corporation; Gulfstream Aerospace Corporation
- Models
- 750, Falcon 900EX, G-1159A, G-IV
- Type certificates
- T00007WI, A46EU, A12EA, A12EA
- On this site
- Cessna 750 Citation X 287 registered
Dassault FALCON 900 277 registered
Gulfstream G-1159 Gulfstream II and III 42 registered
Gulfstream G-IV Gulfstream IV 357 registered - The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 20, 2026.