Mikey,,,,,, Posted March 28, 2021 Report Posted March 28, 2021 I have a Aspen primary flight display and a king 225 auto pilot and the flight director will not come up on the Aspen nor will the heading bug work,or theGPSS steering work. I had the analog converter unit replaced went flying for two hours it worked and now it’s not working again. I have a back up king attitude Indicator and the flight director that seems to be working But when I hit the Hd button on the auto pilot the flight director on the king attitude is banking to the left.the only thing working on the auto pilot is roll,alt,.Aspen says they will charge again if I need a Nother ACU.
Mikey,,,,,, Posted March 28, 2021 Author Report Posted March 28, 2021 The avionics company did the troubleshooting and decided the analog control unit was bad should I be liable for them to pay for another nail all control unit
MIm20c Posted March 28, 2021 Report Posted March 28, 2021 I’d find a new avionics shop...slightly kidding. It’s sounds like your install is still utilizing the king 256 attitude indicator vs the aspen ea100. You will not be able to get the flight director on the aspen without that unit. The 225 is also unique in that it has GPSS internal to the unit. I’m not sure if the installation manual utilizes the gpss internal to the aspen or the AP.
Mikey,,,,,, Posted March 28, 2021 Author Report Posted March 28, 2021 I believe everything runs thru the ACU
Mikey,,,,,, Posted March 28, 2021 Author Report Posted March 28, 2021 It was working good for almost 3 years
Mikey,,,,,, Posted March 28, 2021 Author Report Posted March 28, 2021 I would think the liability on the new ACU would be on the Avionic company the did the 5 hours for so called troubleshooting
MIm20c Posted March 28, 2021 Report Posted March 28, 2021 Could be lots of things. For the past three years did you select GPSS on the aspen?
PeteMc Posted March 28, 2021 Report Posted March 28, 2021 Not an avionics guy, but a techie and just curious.... So BOTH the King and the Aspen display a Flight Director? Do they both get fed from the Aspen converter or is the KFC225 still connected directly to the KI256? What happens if the KI256 is disconnected? If it is failing, any chance it's causing an issue with Aspen? (Again, just thinking of trouble shooting steps.)
Mikey,,,,,, Posted March 28, 2021 Author Report Posted March 28, 2021 2 hours ago, MIm20c said: Could be lots of things. For the past three years did you select GPSS on the aspen? Yes it worked fine.
Mikey,,,,,, Posted March 28, 2021 Author Report Posted March 28, 2021 2 hours ago, PeteMc said: Not an avionics guy, but a techie and just curious.... So BOTH the King and the Aspen display a Flight Director? Do they both get fed from the Aspen converter or is the KFC225 still connected directly to the KI256? What happens if the KI256 is disconnected? If it is failing, any chance it's causing an issue with Aspen? (Again, just thinking of trouble shooting steps.) The flight director is coming up on the ki256 but not the aspen, and the bug or gpss stop working on the aspen also. Crazy
PeteMc Posted March 28, 2021 Report Posted March 28, 2021 Yes, but how is the KI256 being fed? And are there outputs still driving the AutoPilot? I would assume the Aspen and ACU are driving to the autopilot? It will be curious what you find out. Might be worth a flight to another shop just for a second set of eyes. 1
carusoam Posted March 29, 2021 Report Posted March 29, 2021 Let’s invite @Bob Weber to see if this is in his wheel house? (KFC225, KI256, Aspen, and FD bars question...) Best regards, -a-
Jake@BevanAviation Posted March 29, 2021 Report Posted March 29, 2021 So if the KI-256 is still in the aircraft without a EA100 the KI256 is providing the roll and pitch reference to the KC225 for sure. As for the FD bar issue the drive can be paralleled from the KI-256 to the Aspen ACU. See print below for details. However, the parallels for FD commands can not be used if a EA100 is installed (see note 3). If the FD bars are moving correctly on the KI-256 the representation should be mirrored on the Aspen, if they are not I would have to check the voltages to the ACU and then maybe replace the ACU. Also, are you saying that moving the heading bug out from under the lubber provides no correction from the flight computer? 3
carusoam Posted March 30, 2021 Report Posted March 30, 2021 Great details Jake! Seeing if @Mikey,,,,,, saw them... Thanks for sharing them... Best regards, -a- 1
squeaky.stow Posted March 30, 2021 Report Posted March 30, 2021 On 3/29/2021 at 9:14 AM, Jake@BevanAviation said: So if the KI-256 is still in the aircraft without a EA100 the KI256 is providing the roll and pitch reference to the KC225 for sure. As for the FD bar issue the drive can be paralleled from the KI-256 to the Aspen ACU. Apologies for hijacking this thread. I don’t know how to copy a quote and use it to start a new thread. Jake, can AIs other than the KI-256 also provide parallel drives for the Flight Director cues? Specifically, can a GI275 do it? Let me explain why I am asking. The GI 275 can drive legacy autopilots like my KFC 200. The G3X Touch can’t, and it won’t display FD cues from my KFC200 computer. So if I want a large format Garmin EFIS with a Flight Director my understanding is that I either have to buy the G500TXi and a GAD43e or buy a GFC500 autopilot for the G3X to work with. Both are expensive options while my KFC is still working well. If I could drive my KFC200 with my GI275 and mirror the FD cues to a G3X touch, that would be a relatively affordable path to a 10” PFD and still allow an upgrade path to the GFC500 if and when my KFC200 needs replacing. Am I just dreaming CB dreams?
Mikey,,,,,, Posted March 31, 2021 Author Report Posted March 31, 2021 I would like to thank everybody for their comment.We will see what the Avionics company comes up with and get back to everyone. 1
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