As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: CABIN PRESSURE V/S FLUCTUATE )+/- 450 UP AND DOWN CONTINUOUSLY IN FLIGHT TA CRUISE FL 370. SYS 1 AND SYS 2 BOTH OSCILLATE. OUTFLOW VALVE OSCILLATES. CABIN ALT WITHIN PARAMETERS, NO ECAM MEMOS OR CAUTIONS. ACCOMPLISHED OPERATIONAL TEST OF THE PRESSURE CONTROL AND MONITORING CPC 1 AND CPC 2 TEST OK, IAW AMM 21-31-00-710-002-A NO FAULTS NOTED.