As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DIVERTED TO LAX ACCOUNT RIGHT PACK FAILED. AIRPLANE AIR PRESSURE LEAK WAS HIGH. THERE WAS NO EMERGENCY DECLARED. FOUND RIGHT HAND PACK OUTLET (COMPRESSOR) DUCT DISCONNECTED. RECONNECTED RIGHT PACK COMPRESSOR OUTLET DUCT. CHECK GOOD IAW DMC-B787-A-21-50-F2-69A-421A-A.