What was found
CLT FLT 1032 EN-ROUTE CLT TO SJU. ON DEPARTURE, BOTH FLAP POINTERS ON 1/2 WITH THE FLAP LEVER UP. L/E SLAT DISAGREE DISPLAYED. THE FLIGHT DECLARED AN EMERGENCY AND RETURNED TO FIELD CLT. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED L/E SLAT PDU POSITION TRANSMITTER TS5048. OPERATIONALLY CHECKED OK. VENDOR SHOP FINDINGS: FAILS INSULATION TEST. UNIT RECEIVED WITHOUT WINDOW (P/T). UNIT HAS HUMIDITY INSIDE. VACUUM BAKED UNIT TO ELIMINATE THE HUMIDITY. REPLACED THE WINDOW. F/T'D.