What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Flight departed sheboygan, WI (sbm) enroute to Fort Wayne, IN (fwa). In cruise filght at FL210 pilot stated he heard a loud pop and noticed that the cabin altitude was climbing rapidly. Pilot contacted ATC and requested descent. ATC advised there was traffic and unable to comply. Pilot declared an emergency and initiated descent to 10,000 feet. Flight continued to destination below 10,000 feet. Maintenance performed after landing detected a bleed air hose loose at the firewall.
As the FAA filed it
(-23) FLIGHT DEPARTED SHEBOYGAN, WI (SBM) ENROUTE TO FORT WAYNE, IN (FWA). IN CRUISE FILGHT AT FL210 PILOT STATED HE HEARD A LOUD POP AND NOTICED THAT THE CABIN ALTITUDE WAS CLIMBING RAPIDLY. PILOT CONTACTED ATC AND REQUESTED DESCENT. ATC ADVISED THERE WAS TRAFFIC AND UNABLE TO COMPLY. PILOT DECLARED AN EMERGENCY AND INITIATED DESCENT TO 10,000 FEET. FLIGHT CONTINUED TO DESTINATION BELOW 10,000 FEET. MAINTENANCE PERFORMED AFTER LANDING DETECTED A BLEED AIR HOSE LOOSE AT THE FIREWALL.