What was found
MAIN CABIN DOOR DIFFICULT TO OPEN & CLOSE FROM INSIDE & OUTSIDE OF ACFT. WHEN APU BLEED AIR IS ON, THERE`S APPROX A 10 SEC DELAY FOR DOOR SEAL TO DEFLATE AFTER OPENING DOOR. WHEN CLOSING DOOR, PRECATCH WILL HOLD DOOR CLOSED, BUT WILL NOT RELEASE WHEN HANDLE IS PULLED. PERFORMED OPS TEST OF DOOR PRE-CATCH. NO DEFECTS, PRE-CATCH PERFORMS AS REQUIRED. LUBRICATED DOOR LOCKING PINS. PERFORMED OPS CHECK OF DOOR SEAL, WAS NOTED THAT SEAL DEFLATES AT A SLOW RATE. REMOVED SUSPECT FAULTY ACOUSTIC SEAL VALVE & INSTALLED A NEW VALVE. REMOVED BROKEN TUBE ASSY & INSTALLED A NEW TUBE ASSY. OPS CHECK PERFORMED GOOD, NO DEFECTS. WORK PERFORMED IAW MM 52-10-01, 52-10-00, 36-15-00, 25-20-05 & 25-20-17.