As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB, PACK 1 SURGING RATE OF CLIMB WENT TO -1900 BACK TO 0 BACK TO -1900. UNBEARABLE ON THE EARS. DEFERRED IAW MEL ITEM 21-12. COMPLIED WITH MTX PROCEDURES LT PACK INOPERATIVE IAW AML PAGE 3739493 ITEM 1. DURING PRESSURIZATION CHECK FOUND NR 1 SAFETY VLV OPEN, TRANSFERRED TO NRWC 512-ORD-01843. R & R NR 1 SAFETY VLV IAW AMM 21-32-03. OPERATIONS CHECKED GOOD. PERFORMED OPERATIONAL CHECK OF LT PACK IAW AMM 21-51-00. MEL ITEM RESTORED.