What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Great lakes airlines flight 7250 departed den on runway 8 ascending to approximately 9500 ft. cabin alt high annunciator light illuminated. Flight crew heard a loud bang followed by a loud hissing noise. Flight crew did not recieve an annunciator light indication for the cargo door but after press to test was completed the cargo door light illuminated and remained on. Flight crew declared an emergency and returned to Denver. No injuries were reported.
As the FAA filed it
GREAT LAKES AIRLINES FLIGHT 7250 DEPARTED DEN ON RUNWAY 8 ASCENDING TO APPROXIMATELY 9500 FT. CABIN ALT HIGH ANNUNCIATOR LIGHT ILLUMINATED. FLIGHT CREW HEARD A LOUD BANG FOLLOWED BY A LOUD HISSING NOISE. FLIGHT CREW DID NOT RECIEVE AN ANNUNCIATOR LIGHT INDICATION FOR THE CARGO DOOR BUT AFTER PRESS TO TEST WAS COMPLETED THE CARGO DOOR LIGHT ILLUMINATED AND REMAINED ON. FLIGHT CREW DECLARED AN EMERGENCY AND RETURNED TO DENVER. NO INJURIES WERE REPORTED.