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Loss of vacuum pump, VMC on top, leads to a fatal crash

this is even certified for N reg and the price is nearly a give away!! to get you out of trouble and back on the ground
https://aerovonics.com/av-20-1

fly2000

I wouldn’t disagree and I know you can’t put price on life but it my case money does play its part.

But ikf I can get something that is better, more relaibalbe and cheaper in the long term then its a no brainer.

So when my Vacumn pump is up for repalcement. I’ll drop in what ever is the cheapest/available of a Aerovonics AV-30 or a Garmin G5.

Its not perfect. I’ll still have a TC rather but it should be better than whats in it at present.

May I remind people that recognition is the key?

If you have “something in the flight bag”, it may be too late. You may well be in a spiral dive before you know you have an AI issue.

I think that an independent AI on the panel, in your scan, is much better. Or a rate based AP which is engaged as you watch the AI topple but the aircraft remain stable.

EGKB Biggin Hill

Peter_Paul wrote:

would such a product be off good help?

I have the earlier D1. Yes, it could be very helpful. It will run quite a long time on battery, it will give you a full ADI and particularly at night is very much more readable than conventional backup gyros. It’s also fully portable, you you can take it along from airplane to airplane. It comes with a suction mount which you can attach to a window or larger instrument screen. I have also seen one having a velcro strip on the back and being “glued” to the panel on a prepared spot (as the suction mount will stick the instrument quite far into the cockpit on airplanes like the older Mooney which have no dashboard to speak of).

I have the Aspen, the Dynon D1 and a vaccum ADI in my plane, as I can’t get rid of vaccum anyway as it drives the rear step. Particularly for night flying I would always have the D1 installed and ready for action. Otherwise I carry it in my flight case, where in a case like that Bonanza’s failure on top, I could get it out in no time and have it erected. I definitly like it.

LSZH(work) LSZF (GA base), Switzerland

You don’t need this ^ if you have an iPad, ForeFlight and ADS-B. I’ll take a pic next time I fly.

would such a product be off good help? costs are very reasionalbe i guess
https://www.aircraftspruce.com/catalog/avpages/efis10-06727.php?clickkey=2593976



Last Edited by Peter_Paul at 25 Dec 00:31
fly2000

I am flying almost exactly the same V tail as in the accident story. When I bought my Bonanza it had the same configuration. Since a couple of years now I have installed next to my EHSI an castleberry electric stby. I keep a ,post it, square paper block in the hand locker in case its required to cover up the main AI/FD. Yes the Bo is a slippery bird. Reducing power and gear down aircraft trimmed avoid major control inputs could have helped. Going partial panel like he did with a turn an bank requires to be on the top of your game! I may add this to have a full battery independent solution. I have a wet vacuum pump! When your A/P is coupled to it, I would immediately change the dry to a wet pump! Electronics fail too, so when you say changing the source it could be, change from dry to a wet pump!

Last Edited by Vref at 21 Dec 13:57
EBST

Whenever discussion follows an accident like the one above, most flyers – myself included – nearly always automatically discuss getting an alternative instrument, rather than an alternative source.
In nearly all these accidents, the problem is usually a Vacuum source failure, rather than a particular Instrument failing.
Although for many owners it is the moment to think about instrument upgrade; often a far cheaper solution is to get an Alternative Vacuum Source like those produced by the firm Vacuum Source.

Rochester, UK, United Kingdom

In many real-life scenarios there is no practical way to remove a vac AI. A search for KI256 reveals all

Administrator
Shoreham EGKA, United Kingdom

Because I have insufficient money in the first place. Its 400 quid to overhaul a suction driven AH/DI. Garmin G5’s are running at what 3.5K fitted?

Last Edited by Bathman at 21 Dec 12:02
36 Posts
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