What was found
AIRCRAFT N532LA HAD THE FOLLOWING REPORT IN FLIGHT AT 6000 FT ON JUNE 17TH “LOUD BANG AT 6000FT", CREW DID NOT REPORT ANY ENGINE PARAMETERS VARIATION NOR PRESSURIZATION FAULTS; HOWEVER THEY DECIDED TO RETURN TO MIA. ONCE THE AIRPLANE ARRIVED AT MIA, INSPECTION OF THE AIRCRAFT WAS ACCOMPLISHED; EXTERNAL AREAS AND FUSELAGE, MAIN AND LOWER CARGO COMPARTMENTS, INTERNAL PANELS AND OTHERS SURROUNDED AREAS WERE INSPECTED WITHOUT OBSERVATIONS. AIR CONDITIONING DUCTS WERE INSPECTED AND REVEALED A DUCT TO FLIGHT DECK WITH 2 CLAMPS OUT OF POSITION, BOTH CLAMPS WERE REPLACED ACCORDING TO AMM 21-22-00 WITH AIR LEAKAGE TEST AFTER REPLACEMENT. AIR CONDITIONING PACKS LEAKAGE TEST WAS ACCOMPLISHED ACCORDING TO AMM 21-51-00-216-001 WITHOUT OBSERVATIONS, "EXCESSIVE CABIN PRESSURE LEAKAGE TEST" ALSO WAS ACCOMPLISHED ACCORDING TO AMM 05-51-24-782-001 WITH 4 PSI DIFFERENTIAL AND NO FINDINGS WERE NOTED. AIRCRAFT WAS RELEASED AND ON BOARD MECHANIC WAS MONITORING AIRCRAFT CONDITION DURING THE NEXT FLIGHT WITHOUT ANY ABNORMAL CONDITION