What was found
(CAN) WHILE REMOVING FUEL LIDS TO ACCESS FUEL TANKS FOR SNAG RECERTIFICATION FOLLOWING MAJOR INSPECTION, IT WAS NOTICED THAT THE NEW LIGHTNING SEAL P/N CVR 67 THAT WAS INSTALLED IN THE LAST WEEK OR TWO HAD SWOLLEN ALMOST 50 PERCENT LARGER THEN ITS NORMAL SIZE AND THE MATERIAL HAD SOFTEN FROM EXPOSURE TO JET FUEL. THE SEAL WAS ALSO DISLODGED AND HANGING OFF THE LADDER PLATES. WE TESTED OUR STOCK AND FOUND THAT ONLY ONE BATCH OF THE CVR 67 IS AFFECTED BY FUEL REMOVED THIS BATCH FROM OUR STOCK AND REPLACED THE SEAL ON THE AIRCRAFT. WE ARE ALSO GOING TO REPLACE THE SEAL ON ONE OTHER AIRCRAFT THAT WAS ISSUED THIS SEAL FROM THE SAME BATCH NR.