As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PROBLEM DESCRIPTION: RIGHT PACK TRIP UNABLE TO CONTROL CABIN PRESSURE UNTIL 10,000 FEET. CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: REMOVED DEBRIS FROM AFT PIT DOOR, PERFORMED CABIN PRESSURIZATION CHECK IAW B737 AMM 21-31-00 OPS CHECK GOOD NO DEFECTS NOTED