What was found
WHILE CLIMBING THROUGH FL300, A HUMMING OR RUSHING NOISE WAS HEARD COMING FROM ABOVE HEADLINER ADJACENT TO CEO'S SEAT (BETWEEN FIRST 2 FWD FACING SEATS). AT FL400, NOISE INTENSIFIED AND WAS DISRUPTIVE TO PAX. A NOTICEABLE VIBRATION COULD BE FELT IN THE HEADLINER. ON DESCENT THROUGH FL 200 NOISE STARTED TO DISSIPATE. FOUND A LEAK BELOW ADF FAIRING. REPLACED SPACERS ON BOTH ADF ANTENNAS IAW 39-54-03 REV. 27. RESEALED IAW 10-02-00. REINSTALLED ADF ANTENNAS IAW CMP 39520516. PRESSURIZED IAW AMM 21-31-00. FOUND SATISFACOTORY. PERFORMED ADF 1 AND 2 OPS CHECKS IAW COPR 395203-4. OPS CHECKED GOOD.