What was found
(AIRCRAFT 672, L/P 0844166) AFT EXTERIOR FUSELAGE SKIN CORRODED, STATION 1720 AT STRINGER 28RT. REF WO.0672_11/20/2018_LTO, TASK CARD B757 VIRTUAL ROUTINE/012, NR00012. REPAIRED ARE PER ERA 573331-14 REV.ORIGINAL. REMOVED EXISTING REPAIRS, BLENDED AREAS PER B757 SMR 53-60-01, TREATED, PAINTED AND INSTALLED DOUBLER AND TRIPLER PER ERA573331-14.