Inside Look - Aircraft Transponder and Static System Test

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Let's peek over the shoulder of the mechanics as they perform the recurring tests of the aircraft transponder and pitot/static system test, as required by FAR 91.411 and 91.413. Seeing this may give you some helpful insights into how your aircraft instrument works and how their accuracy is ensured.
Special thanks to Shane Vande Voort and Haven Hick of Classic Aviation in Pella, IA for allowing me to capture these tests, as well as to Sullivan Vande Voort for assisting with the video recording.
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Опубликовано:

18 июн 2021

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Комментарии : 92

@mishmish1968 3 года назад

Appreciation, to the maintenance people they're doing a very precise, organized job, these people who make plane fly safely, thanks for sharing this part of the annual maintenance , all the best.

@kevincollins8014 3 года назад

I've always been the type of person that has to know how things work and what's inside them. I guess that's probably why I really enjoy and appreciate these types of videos. I must say a huge thank you to both of those gentleman for allowing them to be filmed and interviewed while they were doing their job. As always of course thanks Martin for taking the time to create these videos for all of us to enjoy. 😁

@wgmskiing 3 года назад

Thanks Martin and thanks a ton to the shop for showing us this. It's a really important set of checks and it's nice to see how they complete the work. These guys are clearly conscientious and thorough.

@johnopalko5223 3 года назад

Being a consummate geek, I really enjoyed this look behind the scenes at a fairly technical process. Thanks! And, yes, I was that weird guy in ground school who got all excited when we went over "Aircraft Systems."

@martinpauly 3 года назад

Good on you, John. A thorough understanding of aircraft systems could make a difference in the outcome of an in-flight failure of something important. Without systems knowledge, how would you even diagnose what's going on? - Martin

@HoundDogMech 3 года назад

You are absolutely correct about doing a very through Preflight after any maintained. I failed to do just that after a Static/Transponder check on a buddy's 182. He dropped me off at the maintained facility in his supper cub and turned right around and left for home airport. I rushed the preflight and on take of I saw the altimeter wasn't reading correctly and neither was the altimeter. I pulled the alternate static source knob and things corrected. Upon getting back to our home airport I found what looked Blackjack Gum on both static ports. My fault for a pispoor preflight.

@WolfPilot 3 года назад

Great tech video Martin! I always love seeing under dash/cowling videos.

@CharlesReiche 3 года назад

A static system with such a low leak rate, a rare find! Interestingly enough the NEW aircraft I worked on usually leaked like a sieve.

@martinpauly 3 года назад

Interesting observation, Charlie. Do you think that's because of the plumbing materials, or workmanship? Hope to see you in Oshkosh next month. - Martin

@Maximka1100 Год назад

I came across with your video in perfect time Martin. I have scheduled my first IFR inspection for next week. Thanks.

@martinpauly Год назад

I hope your transponder and altimeter will pass with flying colors! - Martin

@richardbieber9323 3 года назад

Great video, thanks Martin!

@GGBSystems 3 года назад

Super interesting, Martin. Thanks!

@noochification 3 года назад

Great video, always love to see the insides of an airplane! Even our the new electronic packages will still need checks, just different ones (hopefully easier and cheaper). The piezoelectric sensors to convert pressure into electrons are still susceptible to calibration drift and other problems.

@kevinstruska5823 3 года назад

Cool stuff! I really appreciate you guys going into detail, even if you may not be able to describe everything to a blind guy! Happy father's day!!

@martinpauly 3 года назад

Thanks, Kev! - Martin

@PilotFun101 3 года назад

Thanks for sharing! It is amazing what we dependent on. It may not look like much but its the brains of what information it gives us.

@martinpauly 3 года назад

Exactly. Just think of how much we depend on the altimeter showing accurate altitude - keeping aircraft from running into each other in instrument weather. - Martin

@billnicholson2470 3 года назад

Very interesting Martin. Thanks for this idea to show everyone. Great job.

@martinpauly 3 года назад

Thanks, Bill - glad you found it interesting. - Martin

@jamesjames8402 Год назад

Wow! IFR6000! What a good rig!😍

@guntherbohlen4939 3 года назад

Great inside look in an instrument package we are heavily dependent on. 👍

@martinpauly 3 года назад

Thanks, Günther. You are right, we depend heavily on the accuracy of the altimeter for aircraft separation but also for not running into terrain and obstacles. Even a slight inaccuracy could have bad results. - Martin

@chris.D1 3 года назад

Its really cool that your shop went through all this. Not many would do that.

@edsonherald3720 2 года назад

Pretty Interesting ! I Can Imagine The Same Maintenance Being Done at EHAM (Amsterdam) With 12 ft Below Sea Level ! Truly Important Everywhere !

@lorendjones 3 года назад

Very educational. Helps understand the cost involved.

@martinpauly 3 года назад

Thanks, Loren. Yes, a lot goes on during this inspection. - Martin

@johnfitzpatrick2469 3 года назад

Hello Martin from Sydney Australia. Really appreciate the new learning experience with you and the avionics technicians. Printing a logbook sticker for: *Altimeter *Transponder *Encoder *Static system, highlights the professional standards. Overall very pleased of the accuracy tolerance shown by the gauges, great video. 🌫️🏔️

@martinpauly 3 года назад

Thank you, John. - Martin

@rael5469 3 месяца назад

5:31 That is what we use at a major airline.

@christinewunder1672 3 года назад

Thanks, Martin, very interesting!

@GMascelli 3 года назад

Really enjoyed the video! This provided a detailed look at what needs to be checked and the process. I went through hell in my recent pitot/static cert. Labor intensive but now everything is squared away.

@martinpauly 3 года назад

Glad you enjoyed this one! - Martin

@raulsandoval7003 Год назад

Thank you for the video!

@martinpauly Год назад

My pleasure! - Martin

@prestonmiller9552 3 года назад

Martin, you did it again. Came up with another very interesting video. The technical stuff is probably not what most would consider the most exciting part of flying but it is a necessary and important part of it for sure. Thanks for another great learning video. Hope you made the trip to the bakery. Next to an airport, the bakery (any bakery) is my favorite stop.

@martinpauly 3 года назад

Thank you, Preston. At some point, I'll have to make a video just about the bakery in Pella! 😁 - Martin

@Airplane_Willy 3 года назад

Shane is the man. No doubt. You learn so much from hanging out in the shop. Although I was probably annoying "what's that do" "what's that? Ohhh, that's what that looks like" "why do you have to do that?!?". Most of the mechanics were cool with it. I'm a perpetual dry sponge looking for information to suck up like water.

@martinpauly 3 года назад

And that's how we learn 👍 - Martin

@johnbalieboardman5324 3 года назад

Thank you for a very interesting video.

@martinpauly 3 года назад

You are welcome, John. Glad you enjoyed it. - Martin

@markzimmermann3441 3 года назад

Good explanation. Pilots really need to know these things.😎

@martinpauly 3 года назад

Thank you, Mark. I agree this is helpful for all pilots to understand, at least at a high level. - Martin

@boaz7051 3 года назад

Cheers from the Netherlands! Blue skies!

@martinpauly 3 года назад

Heel erg bedankt, veel groeten uit Iowa.

@jimgiordano5378 3 года назад

Very informative and well done video. I always wondered why it cost $300 or more for this test. After watching this video, it seems like that is a fair price.

@michaelsauser1482 3 года назад

martin--my name is mike sauser -i was co-owner of bonanza 1566z--sadly my co-owner and his 2 passengers were lost in a CFIT on a very foggy night in 2011 on dec 2nd--i really enjoy flying with you from my utube on a 24inch screen-- I am too old to fly but about 1500 of my 2000 hrs are in bonanzas-other planes were cessna 310 and pipers but bonanzas are great

@maheralazzawi7814 Год назад

very good

@grayrabbit2211 2 года назад

Please more videos on what's behind the cowling / panel! So often pilots drop their planes off at the shop and have no idea what goes on.

@eugeneweaver3199 2 года назад

Invoice! What?! All this free advertising you are doing? I think I'd have an invoice for THEM! 😂 Great vid, Martin! Thanks!

@martinpauly 2 года назад

I am sure there is some dream world in which RU-vidrs get everything for free - but in the REAL world... well, you saw it in the video. 😁 All kidding aside - Shane and his team at Classic Aviation are a great shop, and I'm happy to put a plug in for them. - Martin

@LimeyTX 3 года назад

I was shocked to see the Garmin poster in your hangar! Then I realized you weren't in your hangar :) Very interesting video. We take these instruments for granted but, when IFR, the altimeter is extremely important, especially on a non precision approach. My Comanche failed its last test but since I have installed a G500 Txi and a new transponder it should be OK now.

@martinpauly 3 года назад

Thanks, Martin. I agree, your new avionics should make it more likely to pass these tests. - Martin

@Newberntrains 3 года назад

The rental Cherokee had inop suckies on everything but the airspeed for training I assume Whoever preflighted next wrote in the logbook and Mx book “Nxxx Whole panel inop not fit for VFR flight” so they had to get all the instruments retested to null that entry The Mx is no longer kept in the hangar open and alone and is at the FBO where we get the tractor keys to pull the plane to the startup area ( parking spot blasts into light sports T hangar )

@hartvanmeter214 3 года назад

Guys did a very good comprehensive check with one significant exception. The bare scale check is important as frequently ATC reported altimeter settings are very different from QNH (29.92 in. Hg) and the altimetry must adjust and track accurately. The checks are done every 0.50 in. Hg from 28.00 to 30.99 in. Hg. and must be accurate to +- 20’.

@hartvanmeter214 3 года назад

PS . The. Baro-scale is legitimately adjustable. It’s a delicate tweak of the Kolsman knob lock which is behind the cover screw just next to that knob. Don’t try it unless competently trained!

@Stepclimb 3 года назад

Martin mentioned that there were several parts that were edited for time. I’m sure the technicians completed all of the required tests in 14 CFR 43 Appendix E and F.

@ravingcyclist624 3 года назад

FYI. The difference between biennial and biannual is that biennial means once every two years whereas biannual means twice a year.

@eansugarman4675 3 года назад

Excellent video Martin, appreciate the multi camera angle! Is that your son filming? Perfect video for understanding the test. It would be interesting to know the method by which the altimeter talks to the encoder. I’m guessing it must be a ‘analogue to digital’ conversion. Thanks again!

@martinpauly 3 года назад

Thank you, Ean. The altimeter does not talk to the encoder at all. They are both connected to the same static pressure line and work independently from there. An important aspect of the 91.411/91.413 tests is to confirm they are producing the same results based on static pressure changes. - Martin

@5128goldenrod 3 года назад

Very interesting. Great to see this......”unfortunately” your bird was dead nuts on.....would be cool to see the adjustments process....assume there is a screw/valve in th instruments somewhere? Like adjusting a magnetic compass?

@martinpauly 3 года назад

Unfortunately? 🤣

@4-7th_CAV 3 года назад

@@martinpauly I think he means unfortunate in the respect that we didn't get to see what happens if the system is not spot on accurate. A learning process.

@Cavalier-lp8tr 3 года назад

If the barometric readings are off, can they be adjusted?

@maheralazzawi7814 Год назад

Please how can I learn more about transponder SQUAWK

@lynnkramer1211 2 года назад

Did they state what aircraft need this to be performed on them? My Ercoupe has NEVER had these tests done that I know of. I have not owned the plane since new in 1946, but it does have a pitot tube and a alternate static port (both together). Could it be because it is VFR only?

@martinpauly 2 года назад

Lynn, does your Ercoupe have a transponder? If so, it needs to be inspected every 24 months (§ 91.413, "ATC transponder tests and inspections"). The altimeter inspection (§ 91.411) is only required for IFR flight. Regards, Martin

@DreadDoctor 3 года назад

With the digital Encoder my understanding was you only checked a single point. Is the Trans Cal unit different in some way? Im referring to Advisory Circular 43-6D section 9.4.2. There is a note under item 5 about if the altitude is supplied via a digital form, ie 232 or 429 data. For the Trans Cal is 232 (Serial) iirc. Unless Martins is connected via greycode in which case you have to do the entire test. BTW, I like your checklist for the testing. Mind if I use it?

@stevenslager2323 Год назад

FAR 91.411 appendix E explains it a little better

@davidspeyers5740 3 года назад

No trip to the bakery? Were the Tulips at least out or not yet in early March?

@martinpauly 3 года назад

No pastries were harmed in the making of this movie, David. - Martin

@e.l.walker5050 6 месяцев назад

TennesseeTurkey is 30 for 30. Thanks for cross wind tips

@Airplane_Willy 3 года назад

I wonder if that machine can do RVSM checks.

@martinpauly 3 года назад

Good question, Craig. RVSM requires more than just an accurate altimeter check, but I admit I don't know much about it. Certainly those systems would be tested to higher than 20,000 feet. - Martin

@FeralPreacher 3 года назад

Since this is an instrument check, and nothing failed, is there a flat rate for the service? What would be the min-max costs for certification? Glad all worked out well for 70TB. Thanks for sharing.

@jetdoctn 3 года назад

Don't know if Martin wants to publish figures but on our Comanche 260B depending on the shop(we try and use the same one all the time but sometimes it isn't possible)it has run anywhere from 275.00 to no more than 350.00(if they come to you). Not a bad cost in the aircraft world especially if you consider what that test equipment cost.

@martinpauly 3 года назад

Yes, if everything passes this is a flat rate, at least at the times and the shops I've done this in the past. I've only found an issue once during this inspection, which was with the vertical speed indicator, and of course there was an extra charge to have that repaired. Around $300 seems to be an average price I've seen for the inspection flat rate. - Martin

@FeralPreacher 3 года назад

@@jetdoctn Thanks for the info. Was just curious about the recurring cost of IFR certification. Your numbers are in the range I was imagining.

@4-7th_CAV 3 года назад

@@jetdoctn Somewhat related to the testing on your Comanche... yesterday I watched an FAASAFETY . gov webinar on the "2021 National GA Award Winners". It included Michael Colin Dunkley, the 2021 Aviation Technician of the Year. He commented that always taking your plane to the same mechanic could lead to not finding defects because the mechanic "knows" the airplane and has already done the inspection so many times in the past. He wasn't saying that having a go-to mechanic is bad, just that about every 3rd inspection or so owners should have someone else do the inspection and get a fresh set of eyes on it to be able to spot something that may be being inadvertently overlooked. It was a very good webinar. If you, or anyone else, is interested in watching it here is the link to it: www.gaa-live.com/2021.html.

@jetdoctn 3 года назад

@@4-7th_CAV I'am the mechanic and couldn't agree more.

@crissd8283 2 года назад

Does doing all this mess with airtraffic control?? Are they seeing a plane at 5000ft with a strange sqwuak number while it is sitting on the ground?

@PuppyDogPilot Год назад

Yes. See my post on this thread.

@paratyshow 3 года назад

👍☑️Always interesting Martin, how's you new photo crew working out, is his fee separate or is it included?

@martinpauly 3 года назад

Sullivan was great help during this recording. I haven't seen an invoice for his services (yet). Maybe he'll settle for a flight in my Bonanza? 😁

@paratyshow 3 года назад

@@martinpauly + future flight instruction from "Uncle Martin" if he is a good negotiator!

@aeromotivesteampunk4567 2 года назад

How much did the test cost?

@martinpauly 2 года назад

I don't recall exactly, but somewhere between $300 and $400 - that seems to be a typical price range for these checks. - Martin

@Joe_Not_A_Fed 3 года назад

Aero Peru Flight 603 crashed into the Pacific after ground techs forgot to remove silver tape from the static ports after washing the aircraft.

@Whitewaterworthy Год назад

Great info uhm well uhm , uhm, uhm,uhm . Hard to listen too. IA does not = public speaker. Again great info.

@ravingcyclist624 3 года назад

What is the enforcement to ensure that successful testing is done? If I don't have emissions testing done on my car, I can't renew the license plate. Any law enforcement officer can see that, write me a ticket, etc.

@martinpauly 3 года назад

There are random ramp checks that could be extended to a log review, but in most cases you could fly undetected without these required tests until an accident or incident prompts a log review. I would not want to take those chances. - Martin