What was found
MCN - DURING C19 CHECK SKIN PANEL FROM BS 727 TO BS 907 AND FROM STR 20L TO STR 25L WAS BEING REPLACED IAW AMERICA WEST AIRLINES ENGINEERING REPAIR NR 03-5360-06030-SS2. IT WAS DISCOVERED THAT AN EXISTING REPAIR WAS OVER LAPPING THE OLD SKIN PANEL AT BS 727D-8 TO 727D+0. A NUMBER OF OPENING FASTENER HOLES EXISTED IN THE SKIN PANEL BELOW STRINGER 25L. MAINTENANCE FABRICATED REPAIR DOUBLER AND STRUCTURAL FILLER IAW AMERICA WEST AIRLINES ENGINEERING REPAIR NR 03-5361-06048-DF4. MAINTENANCE REMOVED THE EXISTING REPAIR AT BS 727-D TO BS 727D+9 AT STR 25L AND WITH THE NEW SKIN PANEL INSTALLED, INSTALLED FABRICATED REPAIR PARTS IAW AMERICA WEST AIRLINES ENGINEERING REPAIR NR 03-5361-06048-DF4.