As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2679 - RIC - FLIGHT CREW REPORTED FLUCTUATION IN CABIN RATE (0 TO MINUS 100 FPM) ON DESCENT. RIC MX REMOVED AND REPLACED LT ELECTRO PNEUMATIC OUTFLOW VALVE AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.