As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 PACK PRESSURE FLUCTUATED BETWEEN 12 AND 34 PSI DURING DESCENT. CAUSED CABIN PRESSURE V/S TO FLUCTUATE FROM 150 FT/MIN TO 500FT/MIN. ACFT GROUNDED. NR 2 PACK SYSTEM TESTED IAW AMM 21-61-00-710-001. OPS AND TEST PASSED. CPC1 & CPC2 TEST AUTO IAW AMM 21-31-01 TEST PASSED. PFR AND LAST LEG REPORT NO FAULT. AIRCRAFT OK FOR SERVICE.