What was found
PRESSURIZATION ISSUE, EMER DECLARED, AIR RETURN. WINDOW DID NOT SEAL AFTER TAKEOFF LOUD NOISE AFTER LANDING, OBJECT WAS REMOVED FROM TRACK. REMOVED THE CAPTAIN`S HEAD SET JACK STUCK BETWEEN THE WINDOW & THE FRAME PRESSURIZED THE ACFT TO 4 PSI. OPERATIONS CHECKED SEAL, NO LEAK OR NOISE, ACFT OK FOR SERVICE.