What was found
SJU - FLT 678 - DURING CLIMB THROUGH 6000 FEET, FLIGHT ATTENDANT REPORTE A BURNING SMELL AROUND ROW 22 ON RIGHT SIDE OF A/C. RETURNED AND LANDED SJU. INSPECTED A/C CABIN INTERIOR NO BURNING SMELL NOTED. OPENED BOTH AIRCONDITIONING UNITS ACCESS DOORS INSPECTED AREA VISUALLY NO DEFECTS NOTED. TAXIED A/C TO RAMP AND ACCOMPLISHED HIGH POWER RUN-UP WITH ENGINE BLEED ON, UNABLE TO IDENTIFY ANY BURNING SMELL. ALL ENGINE AND LEFT PACK INDICATIONS WERE NORMAL. THE RIGHT PACK IS INOPERATIVE AS PER MEL 21-15B AND PIREP NR 33. (M)