What was found
AILERON SKIN DISBOND, 3-4 YEARS AFTER BOND REPAIR PERFORMED. SUSPECT CAUSE: BREAKDOWN OF BOND DUE TO REPORTED ENTRANCE OF WATER FROM LEADING AND TRAILING EDGES. BOND FAILURE POSSIBLY DUE TO IMPROPER CLEANING PRIOR TO LAY-UP AND INSTALLATION OF FIBERGLASS REPAIRS. SUBMITTER RECOMMENDATIONS TO PREVENT RECURRENCE: PERFORM REMEDIAL AND RECURRENT TRAINING OF TECHNICIANS ON PROPER/CORRECT FIBERGLASS BOND PRACTICES. OPERATOR: SOUTH AFRICAN AIRWAYS.