As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: LEVEL FL260 PRESSURIZATION FLUCTUATED +- 600FT/MIN. NOTICABLE PRESSURE CHANGES IN THE CABIN. CABIN ALT 4700 DECENDED TO 240 STABILIZED CABIN AT 250+- 50FPM. ACCOMPLISHED OPS TEST OF PRESSURE CONTROL AND MONITORING I/A/W AMM 21-31-00-710-002-A. TEST GOOD.