MECHS CHKING NOSE GEAR PROB; PUT ACFT ON JACKS BUT USED WRONG HOLE FOR JACK POINT. ACFT FELL OFF JACKS.

Narrative

ACFT WAS FERRIED TO PHL WITH NOSE GEAR UNSAFE LIGHT FROM SYR. CREW THAT FERRIED ACFT NOTED THEY HAD NOT HAD A NOSE GEAR LIGHT PROB. THERE WAS NO WRITE-UP OR VERBAL ABOUT WHAT SYR MECHS DID TO ACFT. PUT ACFT IN HANGAR. TALKED TO TECH CTR ABOUT WRITE-UPS ON ACFT. DECIDED TO JACK ACFT AND SWING THE NOSE GEAR; TO SEE IF WE COULD GET PROB TO OCCUR. BEFORE JACKING ACFT WE DISCUSSED HOW WE WERE GOING TO JACK ACFT. ACFT WAS JACKED WITHOUT ANY PROBS. OPERATED NOSE GEAR NUMEROUS TIMES; EVERYTHING OK. STARTED TO LET GEAR DOWN WHEN WE HEARD A NOISE; THE ACFT SLOWLY FELL TO THE GND. FORWARD ACFT JACK PAD WAS INSTALLED IN DRAIN LINE HOLE. DRAIN LINE HOLE AND JACK PAD HOLE ARE ABOUT THE SAME SIZE. THERE WERE NO MARKINGS ON EITHER HOLE. TO INDICATE DRAIN HOLE OR JACKING PAINT. WHEN APCHING ACFT FROM R SIDE DRAIN MUST ALSO HIDE JACK PAD HOLE. I THINK BY MARKING HOLES WITH AN INDICATION OF JACK POINT AND NOT A JACK POINT WOULD PREVENT THIS PROB FROM HAPPENING AGAIN; ALSO MORE IMPORTANT TO STOP ANYONE FROM SERIOUS HARM.