What was found
CORROSION ON INTERNAL FUSELAGE SKIN BETWEEN FRAMES 13 AND 14 STR 21L AND 20L. REPAIRED INTERNAL FUSELAGE SKIN BETWEEN FRAMES 13 AND 14, STR 21L AND 20L BY INSTALLED REPAIR DOUBLER AND FILLER IAW SRM 51-75-01,53-21-01, CPM 51-21-05,51-21-06 AND ETN-GN-51-011, ETN-EM-51-075, ETN-EM-51-091, ETN-GN-51-120.