As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 27,000 FEET NR 2 PACK WATER SEPARATOR COVER BLEW OFF. CREW UNABLE TO MAINTAIN PRESSURIZATION ON NR 3 PACK ONLY. AIRCRAFT RETURNED TO BQN. FUEL DUMPED. AIRCRAFT LANDING NORMAL. WATER SEPARATOR COVER REINSTALLED, CLAMP SECURED AND TORQUED IAM MM 21-51-07. OPERATIONAL CHECK AND LEAK CHECK PERFORMED.