As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOOR SEAL HAS AN AUDIBLE FREQUENCY THAT PRESENTS ON CLIMB STARTING AT FL200 THROUGH FL320 WITH PRESSURE DIFFERENTIALS OF 7.5-9.2 RESPECTIVELY. AIRSPEED IN CLIMB WAS 240 KIAS AND .68M. ABOVE FL320 WITH HIGHER TAS AND P DIF, THE NOISE STOPS. GAINED ACCESS TO AND REMOVED DAMAGED TOP ACOUSTIC SEAL P/N 9919042-1 S/N 0278 AND INSTALLED NEW SEAL P/N 9919042-1 S/N 0169 / IAW CE680 MM 52-10-10. CLOSED ALL ACCESS AS REQUIRED.