Mxfarm
Line Up and Wait
Aircraft had a low vacuum waring light installed. Used a MPL 502-VC - which apparently is no longer available. I've been unsuccessful finding a replacement. Is there another switch someone knows of?
panel light vacuum switch
- Thread starter Mxfarm
- Start date
Ryan Klems
Line Up and Wait
The pre-G1000 restart Cessnas also used a vacuum activated switch for low vacuum warning light (P/N F7-16-4) ... it's wired as a normally closed switch providing ground when low/no vacuum, and pulled open when sufficient vacuum is present. The 502-VC is also a normally closed switch according to the PN breakdown I found. Is this on the Comanche in your picture or some other aircraft? If this was added as an STC'd solution, you might want to look to the STC holder to see if they have a recommended replacement. MPL is still in business and still appears to make the 500 series (https://pressuresolutions.com/500-series), so you might also try reaching out to them.
Clip4
Final Approach
Try Radwell
Another source for a generic switch used by precise flight from the Model V standby vac system.
Another source for a generic switch used by precise flight from the Model V standby vac system.
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AV8R_87
Pre-takeoff checklist
A good A&P could probably help you install and sign off this switch as a minor alteration. Trigger pressure is adjustable.
Mxfarm
Line Up and Wait
Thank you sir - one on the way.
Mxfarm
Line Up and Wait
Thank you - was already installed, switch went bad and staying in closed state.
Clip4
Final Approach
. Glad I could help. There is also this which is listed for aviation.
Vacuum Switch
Lone Star’s vacuum switch series (PN: LS03-01023) is intended to be used with a panel mounted annunciator, used to indicate a vacuum system failure (i.e. leakage, vacuum pump failure, etc). The switch is normally closed and will open the contacts at 4-8″ Hg within +/- 1″ Hg on an increasing...
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