As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT ON DESCENT THE CABIN RATE INDICATOR WOULD GO OUT OF THE GREEN BAND. TROUBLESHOT THE PRESSURIZATION SYS WITH TECH SUPPORT. SUSPECT FAULTY PRESSURIZATION SELECTOR. REMOVED DEFECTIVE SELECTOR AND INSTALLED INSPECTED UNIT. OFF PN 22201N071000, OFF SN 267. REF: AMM CH 21-319.