How To Repair Heated Pitot

1. 

   Mark Hunter Filing Flight Programme

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   Marking Hunter

   I have a 1964 Cherokee 235 and I need to install a heated pitot. Was the wiring in place when information technology was manufactured? Is there a reasonable add on function or kilt available?
   Cheers

2. I have a 64 235, and mine has a heated pito tube as standard. But Looking at the parts manual information technology looks similar information technology could go either mode:

   65797-05 E,F Caput Associates - Pitot (unheated)
   69041-05 East,F HEAD ASSEMBLY- Pitot (heated)

   Due east- Used on PA-28-140 with serial numbers 28-20281 to
   28-24999 incIusive, PA-28-150, PA-28-160 and PA-
   28-180 with seriaI numbers 28-1761 to 28-2477
   incIusive, and PA-28-235 with seriaI numbers 28-
   10487 to 28-10675 inclusive.
   F- Used on PA-28-150, PA-28-160 and PA-28-180 with
   seriaI numbers 28-2478 to 284377 incIusive, and PA-
   28-235 with seriaI numbers 28-10676 to 28-11039
   inclusive .

   I'thousand guessing this depends on the pick that was chosen when someone bought the plane. From the picture I'one thousand guessing if y'all remove the existing head you lot tin meet if the wires are at that place.

   

3. Doubtful the wires are there.

4. 

   Bell206 Final Approach

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   Bell206

   Telephone call Piper support direct with your aircraft serial number. Sometimes Piper would install provisions for diverse kits during production like for stall warning organisation. Piper should be able to pull up your original configuration. Later on if y'all demand to install a whole kit and so compare whatsoever STC offerings to the Piper kit.

5. And record that call and so we can hither it. "I want to know if you lot installed a wire that was connected to zip for an choice that was not purchased in a airplane you built 1/2 a century ago."

   guzziguy and kgruber like this.
6. 

   Bell206 Terminal Approach

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   Bell206

   I estimate you lot've never chosen an aviation technical back up dept earlier and asked. Information technology shows.

7. I guess you don't know the history of Piper or how airplanes of that era were congenital.

8. Piper actually has excellent records on shipping produced, and their technical section is extremely helpful. So have you actually always called Piper and spoke to a tech rep?

   N1120A and Bell206 like this.
9. 

   Bell206 Final Approach

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   Bell206

   While I oasis't worked on as many Pipers as other aircraft I actually practise know how aircraft of that era were produced along with a few other airplanes and helicopters.

   And Piper forth with other OEMs have been pretty good at supplying the configuration, ie, "a wire that was connected to nothing for an option," of their shipping as they rolled off the product line either dorsum in a bygone era or today.

   As mentioned in a higher place, information technology'south quite obvious by your comments you lot've never had a meaningfull discussion with any aviation tech rep.

10. Well we take to wait and run into if the OPs wire is there or not. A whole lot easier only to await in the left wing for the wire.

    What you besides seem to discount is the removal of a wire leading no where past someone trouble shooting a problem.

    Concluding edited: Nov xv, 2022

11. We put a heated pitot in our PA28-140 virtually ten years ago. The wiring was not there. That's about all I've got other than that we HAVE had good experiences calling and getting information and documentation from Piper.

12. I could believe that. To handle something similar 10+ amps at 12 Volts, it's gotta be heavy-gauge wire. And then that adds cost and weight. If the original client didn't order the feature, if I were the manufacturer, I would want to omit that heavy wire.

13. 

    Bell206 Last Approach

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    Bell206

    FYI: sometimes OEMs would build shipping in block sets equally they could use the wt/rest record of one shipping for all aircraft in that block thus saving time of private aircraft weighing. So there's always a gamble a particular aircraft may have a system/provisions installed by the OEM during production.

    Last edited: Nov 16, 2022

14. This might be simplistic, only wouldn't this be what they all the same use on new Cherokees?

15. 

    Mark Hunter Filing Flight Programme

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    Marker Hunter

    Thanks for the respond's. The wires are not at that place and nosotros need to install a whole kit

16. Take yous looked into any salvage yards to see if they have the parts?

17. 

    Mark Hunter Filing Flight Plan

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    Mark Hunter

    Yes. Nearly one-half the cost. Full kit is about $800. Salvage about $350

18. 

    Mach Diamond Filing Flight Program

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    Mach Diamond

    I have a 1973 Piper Cherokee 140 and the wires have been there, along with the circuit breaker, for almost 50 years. The merely hardware required for adding pitot heat in my Piper Cherokee and so would be the switch and ii heater elements that slide into the slots pre-drilled in the pitot tube. The wires even take the crimp fittings and are labeled per the wiring diagram in the Piper Cherokee Service Manual. For any Piper Cherokee owners who might read this thread, In my service manual (published 1995) its on folio 4F14. All wires H2A, H2B, and H2C are pre-installed. Wire H2A runs from the pitot circuit breaker to just under where the pitot switch would exist installed. A plastic sleeve keeps the crimp fitting from shorting with the instrument console chassis. Wire H2B runs beyond the bottom of the instrument panel and along so back behind the pilot side panel to the wire packet under the back seats where it connects to wire H2C (the connection allows wing removal). Wire H2C runs out the left wing along with the Nav lite and left tank fuel sender wires. If you remove the access panel past the pitot heater, you should run into the end of H2C somewhere close to the pitot oestrus. Information technology as well has an insulator plastic sleeve secured over the crimp plumbing equipment. You may need a mirror or borescope to discover it. While you take a borescope in there, double check to see if your pitot tube is pre-drilled for heater elements. The factory might not accept been doing this in 1964. Also, the ends of H2A and H2B may be hiding inside the wiring bundle nether the switch panel. You might need to cutting the cipher ties/cord property the wiring bundle together. I judge an hour for the installation of the switch and 2 elements and who knows how long for the paperwork. If y'all want to see whatever pictures or see any additional details, only PM me.

19. 

    MajorTurbulence Pre-takeoff checklist

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    When my heated pitot failed on my PA28-181, the IA bought a whole new replacement, mast and innards. Might take been much cheaper to get just the estrus elements replaced; did not know it was available that way.

20. 

    kshaw Pre-takeoff checklist

    Airparts of Lockhaven did an overhaul of my pitot a few years agone and the overhaul included new heating elements. That would exist much cheaper than new.

21. 

    Mach Diamond Filing Flight Plan

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    Mach Diamond

    For those of you who are an A&P (or have an A&P who is willing for you to do owner assisted work), you lot can purchase the individual heater elements from PMA products available straight from PMA Products Inc. or Aircraft Spruce. The Piper pitot head assembly (mast) has ii heater elements. A shorter iii" long heater element in the forepart which is 70W and a longer 4" heater element in the back which is 100W. Both heater elements slide into iii/16" dia. deep bore holes. If your aircraft ability is 12V, you want parts 464-357 and 464-356. If your shipping power is 24V, y'all want parts 464-440 and 464-441. Each heater element is almost $100 each, or $200 for the set up. There is no agglutinative. It's a friction fit. Y'all might need a pair of plies to pull the old ones out if there is dirt or corrosion. Although I've seen heater elements still easily slide in and out of pitot caput assemblies past manus that haven't been touched in over 50 years. The hardest function is probably removing the three screws belongings the pitot head assembly to the underside of the fly. You lot may demand to drill the heads off if badly corroded. Just watch that you don't accidently gouge the side of the pitot caput assembly with the chuck on your drill when drilling the screw heads off (past fishing the drill too close to the mast). I've seen a pitot head assembly damaged this mode before. The entire job of replacing heater elements shouldn't cost much more than $300 to $350. $200 for parts and $100 for labor (thirty minutes swapping parts including drilling old corroded screw heads, and 30 to 60 minutes for the paperwork).

22. Nicely washed Mach Diamond. Welcome to the forum.

How To Repair Heated Pitot,

Source: https://www.pilotsofamerica.com/community/threads/pa28-235-heated-pitot.122611/

Posted by: garrettmatureaus.blogspot.com

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