Hi Brent:

Yes, you were clear. My three contractors are good. The contactoe that runs the pump motor in my power pack has 24v to it but no juice to operate it coming from the gear indicator CB. This happened after a front alternator change. When we turned on the master the doors opened and warning horn sounded. Cannot get the doors closed or the horn silenced via normal operation. Next step is to call in an air strike. LOL! Thanks for the response.

Bill

Another problem I ran into was a solenoid burnt out on the gear powerpack not allowing operation of the gear, I believe there is a SB on this and the actuators. I had Rick Cox of Coxairparts out of Whichita overhaul them.

Best of Luck,
Brent

Yes, good advice. I have talked to Rick since I was originally suspicious of the power pack. At the moment, having looked at the solenoids electrically, I think that they are ok. I am trying to figure out why I have no power to the solenoid when I select up or down, and why I can't get the doors closed. The door problem could be in the Power Pack priority valve.

When I look at the schematic for the gear operating system, it would appear that I am not getting the circuit through the up/down lock switches to the gear lever/switch. I have looked at each switch with a meter and all are working. I have looked at the continuity of the circuits and they are good. The squat switch is good. That all brings me back to a bad wire/connection somewhere between the NG well and the PP; or the CB and the PP.

I have a new cable tracer that seems to work now. I am going to try tracing the wires from the CB and from the PP. So far, it doesn't appear that the schematic is the same as the airplane. It is a 42 year old plane, so a lot can happen in that time. It seems to not add up at this point. I suspect that I am missing some key element in the troubleshooting loop. Luckily, I am more persistent than smart.

Thanks so much for the conversation, it really helps me get focused.

Bill Hyflyer86

Attachment 1607Red Air Rambo:

If you look at the electrical schematic for the landing gear control system, would you know the physical location of the diode shown in wire S-GD12 leading from the LG switch to the LG solenoid in the schematic? It may be blown but I can't find it.

Thanks,

Bill Hyflyer86

I don't know its location but Don Nieser should. Commodore aircraft 405-722-4079.