What was found
FRONT AND AFT BLOCKS (RIGHT AND LEFT SIDES) FOR WING SPAR ATTACHMENT SHOW HEAVY EXFOLIATION BETWEEN MAIN BOLT SPAR ATTACHMENT AND HOLD-DOWN BOLTS FOR BLOCK, MAY BE UNDETECTABLE WITH WINGS ATTACHED, EVEN WITH SKIRTING REMOVED. MIGHT POSSIBLY DO A MIRROR INSPECTION; IF NOT, WOULD NEED TO MAKE SOME FORM OF PERIODIC INSPECTION SCHEUDLE TO PULL WINGS TO INSPECT INNER BLOCK AREA AND BOLTS FOR CORROSION AND/OR WHEN APPROPRIATE, PULL BLOCK TO INSPECT BACK PORTION AND BOLTS. SHOULD BE NOTED THAT AIRCRAFT SAT IN AN OPEN FIELD FOR APPROXIMATELY TEN YEARS.