My AI died...can GI 275 back up an EFD1000 ?

[LuisO]

Hey guys, looking for your feedback.

What I have:

• Factory Century III which is working just fine
• Aspen EFD1000 PFD (the original, NOT Max)
• Garmin 430W (connected to Aspen)
• GPSS from Aspen guides the AP
• Factory Mitchell AI gives attitude input to the Century AP (factory setup)
• No other vacuum instruments other than AI

Situation:

• The Mitchell AI died
• My vacuum pump is about to die (500+ hours)
• Cost to overhaul the AI and get a new vac pump: ~$1000

What I'm thinking:

• I eventually want to go glass (G3X)
• I don't want to sink $1000 down the drain right now (AI + vac pump)
• Get a Garmin GI 275 (ADAHRS+AP hardware version) to drive the Century AP
• Remove vacuum system

Perceived advantages:

• I can use the GI 275 in the future as a backup to the G3X
• Potentially:
  • I could get rid of the rest of the analog gauges (Airspeed, Altimeter, required now as per Aspen STC [Evolution FAQ Aspen Avionics - Flight Display Glass Cockpit]) since GI 275 would be the backup for these as well as for the Attitude
  • I could get rid of the Turn Coordinator (BOTH Aspen and GI 275 have TC, so why not?)

What is wrong with the above thought process???

Thanks,
Luis.

 

[sanjiv]

 

[philiplane]

 

[65Y]

 

[LuisO]

 

[65Y]

 

[DRichie1]

 

[LuisO]

 

[LuisO]

 

[LuisO]