As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AT 340 EXPERIENCED RAPID CABIN ALTITUDE CLIMB ALONG WITH A LEFT WING AIR LEAK MESSAGE. CABIN ALTITUDE CONTINUED TO CLIMB AS WE DESCENDED. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO PHL WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND DISCONNECTED PNEUMATIC DUCT ON THE RIGHT HAND PACK AND RE-INSTALLED IT PER AMM 36-22-00. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.