Good morning. Long time lurker here. I have a quick question. I have a 1975 Cherokee 140 with a 160 hp conversion. I flew from Boston to Ocean City yesterday and had a perfect flight. Landed at Ocean City, went into the FBO for about 35 minutes and when I came back to the airplane it would not start. Completely dead. Turned the key, pushed the ignition and all I got was a "click". I have a mechanic looking at it and he says he thinks it is a dead battery. My only concern is that I never loss power on anything during my flight and I am sure I did not leave anything on while at the FBO. If it is not the battery, is there anything else that can cause this? Thanks for your help.
Dan
Dan