The STC to enable LPV is the one we created with the support of PPL-IR and covers pretty much any Part 23 aircraft fitted with a 430W or 530W. So for the cost of a Minor change to get the 430W installed and a 300 STC to enable LPV and PRNAV, you get the maximum capability.
Single 430W installation, approved for BRNav is an EASA Minor change, not an STC, even if autopilot coupled, provided it’s coupled in the same manner as a standard VOR/LOC installation. STC is only required if PRNAV or LPV is desired.
You can get an EASA AFMS approved for RNAV 5 and NPA via a Form 32 (Minor change to AFM). A Part 21J with appropriate privileges can approve this directly with no Agency involvement. If you want RNAV-1/PRNAV and LPV, EASA require this to be done via an STC.
It’s acceptable to install the GTN in a Robin under a Minor change. However, the approval will be limited to BRNav and LNav approach. We have done exactly this under our DOA privileges including raising the necessary AFM supplement. However, PRNav and LPV require approval via an STC which will be much more hassle. As to the antenna installation question. From a personal perspective, I...
@Robin_253 Following my last post, the installer has been in touch with me to discuss the issues and has consented to me providing some clarification. For the antennas, the installer is not asking you to determine or approve the locations. He’s asking you to sign box 12 of the CS-STAN form (EASA Form 123 which is an obligation he has to comply with if he’s to sign-off the aircraft....
All permitted panel changes are clearly stated in the G500 STC installation manual. This includes where the standby instruments can go. There are strict limits in the STC on how far you can go in changing the panel structure and at what point you need separate engineering approval (DER 8110-3) if you want to replace a panel section rather than using the adaptor plate. The supplying/installing...