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If your AI is more than 1000hrs since overhaul, you might want to consider
replacing it with an AI that has a vacuum flag. Mike MU-2 Bill Lind wrote in message ... >I have a 172M that I use for vfr & ifr flights. I dont feel comfortable >flying without some redundancy or warning for the vac pump. I also dont >have the budget or panel space to go with backup electrical gyros. I may >budget for a standby vac pump but cant do it now. > >Heres my plan. I plan to install a Precise Flight vac warning indicator >between my AI & DG, this will at least bring my attention to a pump failure >should I miss it in my scan or the vac gage. I do practice partial panel >and hope I would be proficient enough to continue to nearest airport should >I have a pump failure. My research indicates that the main loss of control >after pump failure is in not noticing that gyros are spinning down until too >late, the aircraft has already entered the classic graveyard spiral. > >Im also equipped with a Century I, single axis autopilot. This simple >autopilot has heading hold or will track off a vor or the loran. Its >single best feature in my opinion is that its completely electric and will >continue to function after a vac failure. Theres my redundancy for now. > >Two questions >1. Anyone use the Precise Flight indicator, do you like it? >2. Is my reasoning sound? >Thanks, Bill... > > |
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