How to remove lens from altimeter?

Discussion in 'Maintenance Bay' started by birdus, Mar 3, 2021.

  1. birdus

    birdus Pre-takeoff checklist

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    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
     
  2. Dana

    Dana Pattern Altitude

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    It's probably stuck to the gasket.
     
  3. birdus

    birdus Pre-takeoff checklist

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    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.
     
  4. birdus

    birdus Pre-takeoff checklist

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    Ah, yes. A tiny bit of encouragement and it popped right out. Thanks!
     
  5. Salty

    Salty Final Approach

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    Oh no! Now you let out all the magic altidudy air!
     
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  6. birdus

    birdus Pre-takeoff checklist

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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
     
  7. MauleSkinner

    MauleSkinner Final Approach

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    Schraeder or Presta?
     
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  8. Tom-D

    Tom-D Taxi to Parking

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    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.
     
    Last edited: Mar 3, 2021
  9. Cap'n Jack

    Cap'n Jack Final Approach

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    How about if the A&P gets the correct fittings? Can s/he pump it up then?
     
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  10. MauleSkinner

    MauleSkinner Final Approach

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    It can only be refilled by altimeter fairies.
     
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  11. NordicDave

    NordicDave Pattern Altitude PoA Supporter

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    Hope this is a science project and not going back into an airplane.
     
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  12. Fracpilot

    Fracpilot Pre-takeoff checklist

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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.


    Sent from my iPhone using Tapatalk
     
  13. unsafervguy

    unsafervguy Pattern Altitude

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    who said it was going in a certificated airplane?
     
  14. Brad Smith

    Brad Smith Cleared for Takeoff

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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.
     
  15. wanttaja

    wanttaja En-Route

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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
     
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  16. Brad Smith

    Brad Smith Cleared for Takeoff

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    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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  17. Dixon

    Dixon Filing Flight Plan

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    If you have a Garmin GNS430(W)/530(W) you can always compare altimeter readings at 29.92 inHg
     
  18. DFH65

    DFH65 Pattern Altitude

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    Hec, if you have a cell phone or a smart watch you will probably be close enough.
     
  19. WDD

    WDD Pattern Altitude

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    Why did you pop the lens out? What needs to be fixed ?
     
  20. Checkout_my_Six

    Checkout_my_Six Touchdown! Greaser!

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    altimeter.....alschimeter....who needs one? o_O
     
  21. flyingron

    flyingron Touchdown! Greaser! PoA Supporter

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    [​IMG]
    When students were given a choice of which instrument to break in an emergency, they usually chose the hobbs meter.
     
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  22. WDD

    WDD Pattern Altitude

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    If it’s altiMETER, why does it show height in feet?
     
  23. Tarheelpilot

    Tarheelpilot En-Route

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    Because of how it is.

    that’s just neat.
     
  24. WDD

    WDD Pattern Altitude

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    Kind of why you drive on a parkway and park on a driveway.
     
  25. Tarheelpilot

    Tarheelpilot En-Route

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    Not really
     
  26. Lindberg

    Lindberg En-Route

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    How did you use the altimeter to get down through the clouds?
     
  27. Racerx

    Racerx Line Up and Wait

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    Cook bacon and bake cookies?
     
  28. WDD

    WDD Pattern Altitude

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    upload_2021-4-5_13-8-18.jpeg
     
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