As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD HUMMING NOISE COMING FROM R1 DOOR AT CRUISE FL 390 8.1, PRESSURIZATION STOPPED BEFORE DESCENT. PERFORMED TSM 32-13-00-810826-A, PERFORMED VISUAL INSP ON R1 DOOR SEAL , FRAME AND COVER PLATE IAW AMM 52-10-00-220-007 PRESSURIZED ACFT IAW AMM 05-53-00-780-003. NO HUMMING NOTED.