As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA'S REPORTED LOUD SQUEALING IN AFT GALLEY DURING CLIMB OUT. LASTED 7 MINUTES. PRESSURIZATION NORMAL. COMMUNICATION NORMAL. GROUNDED - YES. (RESOLVED ON W/O: 1962817 TASKCARD: N/R-00001 ) COULD NOT VERIFY SQUEALING IN AFT GALLEY, OLD STYLE OUTFLOW VALVE P/N 4063-19972-01AB HAD HISTORY OF MAKING SQUEALING NOISE. REMOVED OLD STYLE OUTFLOW VALVE AND INSTALLED NEW OUTFLOW VALVE P/N 21230-02AC WITH REF AMM 21-31-03. OPS CHECK GOOD. PRESSURIZED AC TO 3 AND NO SQUEALING NOTED. THIS CLEARED PLT SEAMC DAVE NOTIFIED.