How to remove lens from altimeter?

birdus

birdus

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Jay Williams
How does one remove the lens from an altimeter. I removed the ring from the front and assumed the lens would come right out then, but it doesn't seem to want to.

Altimeter.jpg
 
It's probably stuck to the gasket.
 
Okay. So it's true that it should just pop out? I wasn't positive how it worked and didn't want to force it. I saw a big c-clip underneath and sometimes there are tricks and hidden complexities in things.
 
Ah, yes. A tiny bit of encouragement and it popped right out. Thanks!
 
Salty said:
Oh no! Now you let out all the magic altidudy air!
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It's okay. I'm no dummy. I have a bike pump. I'll just hook it up to the fitting on the back and get it pumped back up.

:D
 
The instruments must be repaired by a certified instrument repair shop. Your A&P can't do it.
65.81 General privileges and limitations.
(a) A certificated mechanic may perform or supervise the maintenance, preventive maintenance or alteration of an aircraft or appliance, or a part thereof, for which he is rated (but excluding major repairs to, and major alterations of, propellers, and any repair to, or alteration of, instruments), and may perform additional duties in accordance with §§65.85, 65.87, and 65.95. However, he may not supervise the maintenance, preventive maintenance, or alteration of, or approve and return to service, any aircraft or appliance, or part thereof, for which he is rated unless he has satisfactorily performed the work concerned at an earlier date. If he has not so performed that work at an earlier date, he may show his ability to do it by performing it to the satisfaction of the Administrator or under the direct supervision of a certificated and appropriately rated mechanic, or a certificated repairman, who has had previous experience in the specific operation concerned.
 
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Tom-D said:
The instruments must be repaired by a certified instrument repair shop. Your A&P can't do it.
65.81 General privileges and limitations.
(a) A certificated mechanic may perform or supervise the maintenance, preventive maintenance or alteration of an aircraft or appliance, or a part thereof, for which he is rated (but excluding major repairs to, and major alterations of, propellers, and any repair to, or alteration of, instruments), and may perform additional duties in accordance with §§65.85, 65.87, and 65.95. However, he may not supervise the maintenance, preventive maintenance, or alteration of, or approve and return to service, any aircraft or appliance, or part thereof, for which he is rated unless he has satisfactorily performed the work concerned at an earlier date. If he has not so performed that work at an earlier date, he may show his ability to do it by performing it to the satisfaction of the Administrator or under the direct supervision of a certificated and appropriately rated mechanic, or a certificated repairman, who has had previous experience in the specific operation concerned.
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MauleSkinner said:
Schraeder or Presta?
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How about if the A&P gets the correct fittings? Can s/he pump it up then?
 
Cap'n Jack said:
How about if the A&P gets the correct fittings? Can s/he pump it up then?
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Nope. Not only is it’s in the FAR’s. But the FAA writtens and practical for getting the A&P were very clear about A&P’s not allowed to work on instrument because it was asked several times on the written exams was on the oral during my practical.


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unsafervguy said:
who said it was going in a certificated airplane?
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Certificated or not, wouldn’t you want the job done right by a professional? Having a reliable altimeter can mean the difference between living or dying.
 
Brad Smith said:
Certificated or not, wouldn’t you want the job done right by a professional? Having a reliable altimeter can mean the difference between living or dying.
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IFR? Yes

VFR? Not so much.

Remember, for VFR, you don't even need a "sensitive" altimeter. It only has to have one hand, and it's not required to be adjustable for barometric pressure.

I need an accurate altimeter to keep me legal (e.g., outside of the local Class B airspace), not safe.

Ron Wanttaja
 
I got caught above the weather once (stupid me!) and had to let let down through it and was GLAD I had a reliable/certificated altimeter. Always good to have reliable instrumentation, even if you only fly VFR.
 
If you have a Garmin GNS430(W)/530(W) you can always compare altimeter readings at 29.92 inHg
 
Dixon said:
If you have a Garmin GNS430(W)/530(W) you can always compare altimeter readings at 29.92 inHg
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Hec, if you have a cell phone or a smart watch you will probably be close enough.
 
Why did you pop the lens out? What needs to be fixed ?
 
hammer.png

When students were given a choice of which instrument to break in an emergency, they usually chose the hobbs meter.
 
If it’s altiMETER, why does it show height in feet?
 
Brad Smith said:
I got caught above the weather once (stupid me!) and had to let let down through it and was GLAD I had a reliable/certificated altimeter. Always good to have reliable instrumentation, even if you only fly VFR.
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How did you use the altimeter to get down through the clouds?
 
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