As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN FAILED TO PRESSURIZE ON DEPARTURE. QRH COMPLIED WITH. LOUD HISSING NOISE REPORTED FROM L2 DOOR 20 MINUTES INTO FLIGHT. PACKS RETURNED TO NORMAL OPERATION. MAINTENANCE PRESSURIZED AIRCRAFT TO 5 PSI AND CHECKED L2 DOOR. SLIGHT NOISE. NO DEBRIS AND LUBRICATED SEAL. PERFORMED PACK ODI PREVENTION ON BOTH PACKS. AIRCRAFT OKAY FOR SERVICE.