Garmin GI 275 Installation Manual page 432

[8] For the Century 31/41, ensure any jumpers at CD185 pins 8, 9, and 17 are removed to configure computer for an NSD 360A.
[9] For the KAP 140 and KFC 225, the GPS SELECT discrete configuration setting on the GNS 400W/500W must be set to Prompt in accordance with
GNS 400W/500W Series Installation Manual, GTN 6XX/7XX Part 23 AML STC Installation Manual, or GTN Xi Part 23 AML STC Installation Manual.
[10] The KFC 225 must be configured for DC analog heading and A429 GPS steering.
[11] For Cessna autopilots with NAV 1/NAV 2 source switching on the autopilot mode controller, the NAV 1/NAV 2 source identification (lighted switch
caption) on the mode controller must be obliterated (i.e., hidden from view). All NAV source switching is accomplished on the GI 275.
[12] The CA-1050A autopilot computer must be configured for a Century NSD-360 HSI or equivalent (DC Heading and Course Error signals). The
GI 275 can emulate AC Heading and Course Error (Datum) signals; however, this has currently not been evaluated as part of this STC. Installers
are encouraged to utilize the NSD-360 DC setting to avoid the burden of additional installation approval efforts.
[13] Garmin autopilots can interface to a GI 275 ADAHRS unit (i.e., a GI 275 ADAHRS+AP unit is not required).
[14] If a GI 275 is installed with and interfaced to a GFC 600, then a third party HSI cannot provide the heading and course error data to the GFC 600.
[15] If the GI 275 is used to provide attitude to the Century II/IIB/III autopilot, the GI 275 hardware must be MOD 1 or later.
[16] If the aircraft has a 1C388-2 or 1C388-3 Radio Coupler, two GI 275 ADAHRS+AP units are required in order to provide the HSI and GYRO
interfaces.
[17] The Century II/IIB autopilot is equivalent to the Piper AutoControl III and IIIB autopilots, and the Century III autopilot is equivalent to the Piper
Altimatic III, IIIB, and IIIC autopilots.
[18] For interface approval with the GFC 500, refer to GFC 500 STC SA01866WI.
190-02246-10
Rev. 11
GI 275 Part 23 AML STC Installation Manual
Page C-14