aircraft transponder Narco AT 150 TSO & tray working when parked free returns

-Condition:  This was working when the aircraft was parked, if you have any issues with it you can return it for a full refund. Please look at all pictures & read entire description. All parts can be returned for a full refund.  

-Part was removed from a grumman American Yankee AA-1. Serial number AA1-0058. Tail number N5658L. Part(s) may fit on other models, please check part numbers for compatibility.

-What you see in the pictures is what you get.

-All parts, unless it is indicated, have not been serviced. Parts will be described as accurately as possible. It is the responsibility of the Buyer to make the final judgement if they want to purchase any part(s). Unless indicated, no part is guaranteed to be airworthy. Buyer is responsible to service and test any part(s) purchased. Seller will not be responsible for any accident/injury resulting in the use of a used aircraft part.