RocketAviator Posted March 19, 2018 Report Posted March 19, 2018 (edited) As the title says... any leads or suggestions appreciated! Repair or exchange. im fairly sure the engagement coil or the circuit that drives the coil are what is bad on mine. Edited March 19, 2018 by RocketAviator Quote
KSMooniac Posted March 19, 2018 Report Posted March 19, 2018 As the title says... any leads or suggestions appreciated! Repair or exchange. im fairly sure the engagement coil or the circuit that drives the coil are what is bad on mine. Try Bevan-Rabell or Mid-Continent Instruments, both in Wichita. Either can likely repair yours. Sent from my LG-US996 using Tapatalk Quote
carusoam Posted March 19, 2018 Report Posted March 19, 2018 Some ideas of people that might have been in your shoes... https://mooneyspace.com/search/?&q=Servo motor repair&sortby=newest From industrial experience... it might be a perfectly good idea to have the servo OH’d. I didn’t see any particular resource of a go to servo motor overhauler... Best regards, -a- Quote
Mark89114 Posted March 19, 2018 Report Posted March 19, 2018 My experience was after an unhappy to be litigated experience with Autopilot Central is that the most economical solution for the motor going bad was only about $1800 for an overhauled up to date mods etc. unit directly from BK.. While I was doing my research on this I did find somebody who overhauled the pittman motors....I think(hope) I saved the link on my ipad. I will check this evening. My avionics guy said by the time he would have gone through, tested, repaired, etc everything the overhauled unit was the most economical. The important thing is he found the problem right away without any shotgunning parts like a certain well regarded repair shop. Quote
carusoam Posted March 19, 2018 Report Posted March 19, 2018 Interesting possible resource.... as posted by our KS brother above.... Mid Continent... the instrument people, also service and OH BK servos... https://www.mcico.com/servos-and-actuators-3 I saw Similar PNs, but not the exact one being discussed here... Could not find servo info at Bevan-Rabell... https://www.bevanrabell.com/ PP thoughts only, haven’t oh’d a servo yet... Best regards, -a- Quote
KSMooniac Posted March 19, 2018 Report Posted March 19, 2018 Interesting possible resource.... as posted by our KS brother above.... Mid Continent... the instrument people, also service and OH BK servos...https://www.mcico.com/servos-and-actuators-3 I saw Similar PNs, but not the exact one being discussed here... Could not find servo info at Bevan-Rabell... https://www.bevanrabell.com/ PP thoughts only, haven’t oh’d a servo yet... Best regards, -a- B-R doesn't have a comprehensive website, but they have a very capable bench repair shop and are likely less expensive than MCICO. MCICO might have an exchange unit available, though.Sent from my LG-US996 using Tapatalk 1 Quote
kortopates Posted March 19, 2018 Report Posted March 19, 2018 The biggest concern about using Bendix King for such repairs is that they'll require any item brought up to the current mod level in addition to any repairs. But some mod updates can be very expensive. Some years ago I sent them a pitch-trim servo that was behind 3 or 4 mods since it was from an '86 and they wanted in $4-5K to repair it largely due one of the mods being several thousand. I eventually went with another salvage unit I found and got satisfactorily bench tested. Quote
Mark89114 Posted March 19, 2018 Report Posted March 19, 2018 1 hour ago, kortopates said: The biggest concern about using Bendix King for such repairs is that they'll require any item brought up to the current mod level in addition to any repairs. But some mod updates can be very expensive. Some years ago I sent them a pitch-trim servo that was behind 3 or 4 mods since it was from an '86 and they wanted in $4-5K to repair it largely due one of the mods being several thousand. I eventually went with another salvage unit I found and got satisfactorily bench tested. I am no expert....I was charged $1.8k for an exchanged pitch trim servo from Honeywell, with everything being brought to latest mods. They replaced the motor and other bits and pieces so someone is getting the motors repaired or new. I couldn't tell you which. here is the company that advertises they repair Pittman motors........no idea on legality of using them or their actual capabilities... http://www.bigwoodselectric.com/ Quote
carusoam Posted March 19, 2018 Report Posted March 19, 2018 Interesting page... regarding maintenance of BK servos 177, 178, and 179... https://www.duncanaviation.aero/intelligence/2013/May/bendix-king-autopilot-100-150-series-servo-maintenance They have a few pages describing various servo failures related to BK APs... might be worth comparing to BK... https://www.duncanaviation.aero/services/components-repairs/ Best regards, -a- Quote
M20JFlyer Posted March 20, 2018 Report Posted March 20, 2018 Rocket Aviator If as you move forward with your King/Honeywell autopilot and you need to repair a pittman motor The servo motor can be repaired with integrity and experienced people . Just saying if it is the motor the (servo ) that needs attention try http://www.bigwoodselectric.com/ They repaired mine in 2012 and it has worked perfect for 700 + hours The gentleman in charge at that time was Zach... his phone # was 701.642.3145. Let all of us on MS know how you proceed ..because these legacy AP's need affordable people like bigwoods to service our needs Don't mess with Texas N9135W 201 MSE Houston 1 Quote
carusoam Posted March 20, 2018 Report Posted March 20, 2018 M20JF, Can you share a price for the work you had done? Any details on the OH or repair? Best regards, -a- Quote
RocketAviator Posted March 20, 2018 Author Report Posted March 20, 2018 Super thanks to all, I had great support from MDoc here on MS & Alan at Autopilot Central & Mooney Factory in getting documentation to troubleshoot my unit. After a number of hours found the problem. Mid Continent quoted me 4500 exchange! A other shops quoted everywhere starting at 1100 plus parts to 1800 for general repair.... whatever that was suppose to include! Alan said he thought they could repair it based on what I told him I had found for a couple hours labor. Spent most of the day calling everyone I could find or anyone told me they might have one. Mid Cont was the only one that said they had one for 4500 exchange, they were also the last one to work on this one in 2013! Motor works fine only issue was with the engage solenoid. All is well, hope to reinstalling tomorrow. I sure hope a decent long term reasonable cost AP is close at hand! Thanks again everyone for your generous assistance. 1 Quote
carusoam Posted March 20, 2018 Report Posted March 20, 2018 Nicely detailed follow-up, Lacee. thanks for sharing. Best regards, -a- Quote
rxj Posted July 21, 2018 Report Posted July 21, 2018 I'm interested to buy a KS 179-04 but without an OHE. The unit doesn't need to be working. Does anyone know of where I might get one? Rj Quote
carusoam Posted July 22, 2018 Report Posted July 22, 2018 Welcome aboard, Rj. Best regards, -a- Quote
fentho Posted July 31, 2018 Report Posted July 31, 2018 On 3/19/2018 at 9:17 AM, RocketAviator said: As the title says... any leads or suggestions appreciated! Repair or exchange. im fairly sure the engagement coil or the circuit that drives the coil are what is bad on mine. Try Redbird Electronics - Dallas, Tx 214-337-8958. Ralph Ryan knows these servos inside & out. Quote
Jerry Pressley Posted June 18, 2021 Report Posted June 18, 2021 HAVE A KS178 IF SIMILAR JERRY 423 231 3491 Quote
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