stec 30 altitude hold problem

And it glows whether or not the autopilot is engaged. Their time investment is on them while I fully expect an on-quote check to be written. Pasted as rich text. Heading bug 7 degrees offset in Autopilot mode. You have a sub min. I'd give a hard look at Mooneys. System 30. I think you'd have a hard time beating that price by more than one or two AMU's with a used STEC flying. Do you normally fly at 1500 feet with the control lock in? D connector, I believe pins 2,3,4,and 7 are used, but you can look at your existing wiring to find out. Make sure the sensor is secured down correctly and is not vibrating. The STEC30/altitude is a really nice autopilot if it's already installed in your airplane. I had this convo with my installer three days ago. I have a 1969 Piper Cherokee 235 with a STEC 30 auto-pilot. I had tunnel vision, vertigo and auditory exclusion the more he talked. (Obviously, be sure the autopilot is off and the airplane is trimmed up before takeoff.). With a rather curious intermittent fault. Pa28-140 Pre-takeoff checklist Joined: Dec 6, 2009 Messages: 192 Location: Kansas City suburb Display name: Gordon Shumway I'm having an issue with my altitude hold on the STEC 30 autopilot. Replace each of these LRUs in turn. WTF!! It will have a static line going to it. My STEC-30 has altitude hold but no VNAV. I've got a request in with our field maintenance shop to take a look, but I always like to give them specific ideas so they don't spend all my money doing their OWN hunting! The System Thirty ALT is a single-axis altitude hold autopilot, which can be installed as a stand-alone pitch autopilot, or to complement any brand of existing roll-axis autopilot system. Just fly the vertical axis by hand, it's keeping you centered laterally. One other bit of advice that was passed to me yesterday was that S-TEC says during the pre-flight routine, it's important to actually do the clutch-override process as that helps "clear the mechanism" (my term) to keep them performing better. As expected, Lance knows more about my own autopilot than I do. All very standard for a Cirrus of this vintage, and a factory fit. Post any technical issues here. Might want to try the alternate air source while its misbehaving to see if that helps or changes the behavior. How to find that an original function isn't functioning? CESSNA STEC 30 ALTITUDE HOLD ATTENTION WHOLESALE BUYERS This is alt. It seems like there might be something very simple that's wrong, and I might be about to blow 2amu for nothing. Hey, probably me being inept.I was at 3000ft trimmed turned on the AP, the status light showed ready (and can confirm as I was able to hold heading). If you have an account, sign in now to post with your account. I built a pigtail and did this ea. It's been solid and reliable. The pitch servo probably needs to be repaired or overhauled. Audible alert is squelched". The views and opinions of originators and contributors expressed on this site are their own. keep me posted. We have placed cookies on your device to help make this website better. Worth the cost vs the Brittain? Audible alert is squelched". Otherwise, to troubleshoot, you need to check the signals properly. A heading bug is normally a voltage, plus or minus x mV either side of straight ahead and this is easy to check. It started porpoising pretty badly while it hunted for altitude. Altitude Hold, Stabilization, Heading, and tracking VORs and GPS waypoints.If you just need info on one particular mode of the autopilot, you can skip to the relevant section by using the links below.Altitude Hold: http://youtu.be/-96FkQ8LP50?t=1m48sStablilization Mode: http://youtu.be/-96FkQ8LP50?t=2m16sHeadling Mode: http://youtu.be/-96FkQ8LP50?t=3m4sTRK Lo/HI with VOR/LOC: http://youtu.be/-96FkQ8LP50?t=4m38sTRK Lo/Hi foth GPS: http://youtu.be/-96FkQ8LP50?t=5m43s If that does not work it could be a dry joint in the converter box, or possibly a fault in the HSI error output which would need one or other replacing to determine which is faulty. Your only hope then is to find a bad connection by accident; failing that, attach some wires to some signals, bringing them back to the cockpit where they can be probed, and go for a flight with somebody checking the voltages. The shaft should not bind even the slightest bit when moving the yoke in and out. We are actually getting the Trio system in the next few weeks. So if GPSS works, that eliminates the autopilot as being the issue. Prop 65 Warning: This product may contain chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. Powered by Invision Community. This is all good feedback, and it gives me some things to discuss with maintenance. The fault only arose on the first flight after lockdown, so that is a clue, No one seems to have had the same issue, but it is a common installation, so I am hoping someone has a steer for me (excuse the pun). If you see a plane that is in excellent condition other than a non-working C-III and the price reflects that, you could install the one you want. If you have an account, sign in now to post with your account. Paste as plain text instead, Century III Autopilots | Pilots of America I might have picked up on the problem earlier if it did, since it . It will have a static line going to it. With that in mind, and after reading this thread, I gently wiggled the connectors to see if that would solve the problem, and it did; on the ground, but the moment the engine started the vibration caused the fault to emerge, literally as the engine ran the light came on again, intermittently then constantly. Painful topic - my own personal saga with the STEC-30, which I think has the same basic altitude hold system, is in the thread below. I disengage it and re-engage it, and then it worked fine. This single axis stec can be useful for someone until their model gets an stc however. February 12, 2019 in Avionics/Panel Discussion. Simple low cost item before digging deeper. Never any problem in three years of ownership. But so far he's avoided buying any of them, which puts him pretty high on the smarter-than-the-average-bear roster. Genesys Aerosystems SYSTEM 30 Two-axis Autopilot - Sarasota Avionics The gizmo is about 1.5 round and an inch thick. I am not saying this is your issue, but this is a known problem with STEC servos, right Barry? Roughly, it will cost you about half of the purchase price of a new model to get it through the S-Tec process of getting an STC for your airplane. S-TEC 30 Autopilot Operation - YouTube In the case of your S-Tec30, thatwill easily get you above the $10K mark, and it is not yet installed! So I took the plane up for a little cross country for the holiday and out of no where the altitude hold on my STEC 30 autopilot would not hold altitude. You can post now and register later. Mike, the problem came back a few weeks ago so I spoke with Brian Kendrick about all the possibilities. Genesys Aerosystems SYSTEM 30 ALT - Sarasota Avionics Try not trimming it too perfectly, adjust it so its slightly out of trim.Tom, Dev - make sure there is no water in the static system. Paste as plain text instead, Supporter; 848 Pasted as rich text. Ill likely be selling my S-TEC 30 once Dynon gets their AP approved. Got to get some good experience hand flying again. This is a fix that was given to me by an STEC tech back in '05. S-TEC System 30 Autopilot - Sarasota Avionics STEC 30 Altitude hold issue | Pilots of America The altitude hold oscillates wildly by 150 feet or more. Pitch trim: That alone makes it superior to the Century in my book. If however the GPSS mode switch is in GPSS mode it extinguishes, so the leakage is happening only when the converter is in HDG mode, so something is happening between the HSI and the STEC, when the Converter is switched out of the circuit. It is working fine except for slight a slight porpus at altitude hold engagement. He jumped the power terminals on the trim servo, and then the pitch servo with a D-cell battery. josephades, Aug 8, 2016 #1 GlennAB1 Ejection Handle Pulled Joined: Oct 5, 2015 Messages: 4,889 Location: Home will always be Vandalia, OH Display name: GlennAB1 Try following the command? Can You Afford NOT To Install A New Autopilot In Your Used Plane? Altitude hold got intermittent and would often oscillate. Or some connecting pins bridging somewhere due to corrosion. Your link has been automatically embedded. It was found to be the pitch servo. By DXB There is a HDG/GPSS Switch / Converter which disconnects the analogue heading mode, and converts the GNS 430 GPS signal to analogue to drive the autopilot in GPS mode. Yet another reason Im installing a TruTrak when able. This means you can't add a response. A2A Piper Cherokee 180 S-TEC 30 Autopilot Tutorial - YouTube Somewhere there is voltage leaking into an otherwise unused LED in heading mode causing it to offset its null. A new or yellow taggedservo also has to be "approved" for your STC by Genesis (read: pay a vig) if I am not mistaken, at least that was the case when I *thought* I had a bad servo until I learned of the clean the armature trick. It was in a Maule, but Im sure it wont mind slumming in a Cirrus for a short while. . . I cant remember the pinouts right off. Smooth air or turbulence made zero difference. FWIW the STEC-30 and STEC-60 altitude hold systems are very similar I believe - there are numerous possibilities I tried to document in this tread, including excercising servos - which didn't work for me. Your previous content has been restored. By the time you add in those factors and used part conditions, the gfc looks pretty good. Engaging it when out of trim seems to help. Your previous content has been restored. I try to troubleshoot for over an hour and give up, convinced it's permanently busted. So chief suspect is the connectors, and it is most likely corrosion so may be as simple an issue as removing them, inspecting the pins for mechanical integrity, spraying with contact cleaner, and replacing them. I did a hard reset of the A/P system and tried again, and it held altitude for a minute or so and then the oscillations started back up. The tech suggested that while on the ground, turn on the autopilot and run the vertical speed up 1500 and then down 1500. It would often do both on the same flight. July 10, 2020 in Avionics/Panel Discussion. There should be a null when the heading is the same as the heading bug. Altitude Hold Mode Manually fly the airplane to the desired altitude and level off A roll mode must be selected prior to engaging a pitch mode Select ALT mode on autopilot mode controller Altitude may be fine tuned using the VS knob 20 foot increments Maximum authority +/- 360 feet NOTE Problem with S-TEC 55X Autopilot in Bonanza A36 The oscillations recently got so bad that the altitude hold would slam the nose 10 degrees down suddenly for no apparent reason. I now do it once a month regardless if it it holding or not. AFaIK they both can use a 52D67 or 52D167 horizon gyro. Also, these servos have a maintenance routine that may need to be conducted. S-TEC Autopilots - Backcountry Pilot I have been having a problem with my IFD540, Aspen, STEC-30 combination during an approach. The transducer would than call for up or down pitch from the servo to hold the assigned altitude. Is it potentially somewhere in a connector? Your previous content has been restored. Sending in one part pf after another gets very expensive without fixing it. STEC 30 - silence the altitude alerts | Pilots of America I am now experiencing an issue where after leveling off at altitude and engaging the autopilot in NAV and ALT mode, the autopilot holds the proper heading but the altitude sometimes will climb or descend from the set point by +/- 100-200 feet per minute. Stec 30A altitude hold for sale $2800 - Pilots of America Ha - that static moisture and/or switch problem sounds like the kind of intermittent problem that might cause my issue. So the next stage is to unplug the connector to the roll steering computer, clean and inspect the pins from the front, and replace. Powered by Invision Community. Century IIB autopilot - General Mooney Talk - Mooneyspace.com - A And it is intermittent. The STEC/Cobham System 30 ALT is the simple Altitude -Hold add on for your Piper Autocontrol IIB. yes, the cost is significantly more on paper, but install is about the same and youll have to pay stec to get the stc for your airplane. Speaking of evaluating a purchase, if I was test flying an aircraft equipped with any autopilot, what is a decent routine to ensure the functions are working as advertised? OK; with nobody in the business being bothered about helping somebody out let me have a go. And then about 7 hours labor for removal, install, and bench check. Make sure it springs out after you push it in. The pitch servo is the most complicated servo of the autopilot system. It happens to me prettyconsistently when flying right at nightfall, making me think it's some kind of condensation issue somewhere in the system as the air cools, or maybe when the air becomes smoother? You can post now and register later. I really like my STEC-30 with altitude hold and GPSS. The heading signal wont be flowing through it. Disclaimer: This is a publicly accessible system. Your link has been automatically embedded. The System Thirty ALT is a single-axis altitude hold autopilot, which can be installed as a stand-alone pitch autopilot, or to complement any brand of existing roll-axis autopilot system. SYSTEM 30 ALT Brochure / Manual. I agree with all the above comments. Display as a link instead, That and their refusal to certify the Mooney for the 3100 and I'm for one, not interested in doing business with them. Genesys just doesn't like their products on the used market and makes it difficult. Aug 18, 2017 Messages: 2,018 Display name: Hang 4 Mine works well IFR. Display as a link instead, I have 55X and about a year ago my airplane started oscillating in level flight with the alt. Sadly I already tried that one, forgot to mention above. Unfortunately the auto trim is not functioning. Many probably have seen S-Tec 30s for sale for under $4k complete. CYSH Pitch trim annunciator. OK so removed the plugs visually inspected, sprayed them with contact cleaner and replaced. Maybe there is no difference, I really need this explained. Jeff, run the servo motor in each direction for about a minute to clean the armature. See if the AP has a rubber hose connecting it to the static system Rubber hoses have a tendency to age poorly One minute it is using static data, next it is using internalcabin pressure (slight vacuum compared static line). Before now, I was mostly hand flying approaches and apparently never completed an approach on autopilot down to the minimums. Per the STEC folks at Oshkosh this year, there are about a dozen causes for this problem. Hang 4, Aug 2, 2020 #2 N1120A and Stan Cooper like this. The stec is likely to cost more in the long run. It turned out the pitch servo needed be overhauled. Curious behaviour of the Heading Bug - STEC 30 - EuroGA I have a difficult time believing it takes 13 hours to install one servo. Move A/C control Wheel forward until TRIM DN lamp is extinguished. Clear editor. PDF S-tec System 50 Two-axis Automatic Flight Section Ii Guidance System What the H! Thanks for all the really interesting and useful input from everyone. But it seems the lack of work for the brushes are what cause the issues. 2AMU. In my case there was a happy ending after I found the connector between the pressure switch and the control module andpainted the contacts with Stabilant 22. We have placed cookies on your device to help make this website better. Maybe in a year or two. Display as a link instead, Downfall is that it has to get back to STEC to get recertified for install to your aircraft legally under the STC. I would clean the signal path from the HSI to the STEC-30 for HDG information. Installed in the US, it's about $9500-10,000 Installed. Looking to swap the ST-901 out for a used replacement (NSD360 strapped). Next steps. hold only from 182Q 28v system ready to install, ad your existing 300, etc works great Contact Joe Armbruster AIRCRAFT BY ARMBRUSTER LLC , - located Amherst, OH 44001 United States Telephone: 440-320-6726 Posted June 19, 2023 Show all Ads posted by this Advertis.

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