What was found
CABIN MAIN ENTRY DOOR SEAL LEAKS ON APPROACH. LOUD SQUEAL/COKE BOTTLE NOISE FROM THE MAIN ENTRY DOOR WHEN CABIN PRESSURE DIFFERENTIAL PSI IS AROUND 3PSI. COMPLIED WITH GVI OF THE MAIN CABIN DOOR AND DIDNT SEE DAMAGE BY GVI. DURING INSP OF CABIN DOOR SEAL, FOUND IT TO ROLL UP WHEN CLOSING, AFT CENTER SECTION OF DOOR ABOUT 6 INCHES LONG. INVESTIGATED & FOUND SECTION OF CABIN DOOR SEAL TO BE SITTING FLUSH AGAINST FRAME, & ROLLED SECTION ALLIGNMENT LAYING DIFFERENT, NOT FLUSH ON FRAME. WENT TO LOOSEN DOOR SEAL RETAINER, FOUND ALL RETAINING SCREWS AROUND DOOR SEAL TO BE LOOSE. REALLIGNED DOOR SEAL TO CORRECT POSITION & SECURED SCREWS IAW MM 52-10-00. NO DEFECTS.