What was found
(CAN) CRACK INDICATION IN FUSELAGE PRESSURIZATION SKIN AT BS1170 ABOVE STRINGER 18L. CRACK THREE INCHES IN LENGTH JOINED A HORIZONTAL LINE OF PAINT BLISTERS IN A 10 INCH LINE OF BLISTERS. DISBONDED DOUBLER AND SEVERE CORROSION OF SKIN AND DOUBLER ON BOND FACES. PANEL REPLACED. ADJACENT LOWER SKIN ALSO DISBONDED AND CORRODED BS1148 TO BS1183 STRINGER 20L TO 24L REPLACED. AREA OF PREVIOUS LAVATORY INSTALLATION.