What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) 04/06/2007 At 1502 local, colgan air flight 4912, returned to land on runway 23 at shenadoah regional airport (shd), Virginia after the aft cargo door blew open shortly after takeoff. The ARFF responded and the aircraft taxied to the ramp without incident. The captain stated that the flight departed at 14:55; there were no indications of a cargo door warning. At approximately 800' AGL they experienced a loud rush of air and a change in the flight characteristics of the aircraft. The captain stated that he initiated a return to shd and on the base leg to runway 23 he tapped on the annunciater panel and the cargo door warning light illuminated with a master warning light. The airport authority took pictures of the N172MJ, the Raytheon BE-1900-D aircraft which depict the cargo door open and positioned at an 11:00 on the dorsal fin. Pictures of the exterior cargo door handle shows it is in the "unlocked" position. An inspection of the door locking mechanism did not reveal defects that would have enabled the door to unlock and open up in flight.
As the FAA filed it
(-23) 04/06/2007 AT 1502 LOCAL, COLGAN AIR FLIGHT 4912, RETURNED TO LAND ON RUNWAY 23 AT SHENADOAH REGIONAL AIRPORT (SHD), VIRGINIA AFTER THE AFT CARGO DOOR BLEW OPEN SHORTLY AFTER TAKEOFF. THE ARFF RESPONDED AND THE AIRCRAFT TAXIED TO THE RAMP WITHOUT INCIDENT. THE CAPTAIN STATED THAT THE FLIGHT DEPARTED AT 14:55; THERE WERE NO INDICATIONS OF A CARGO DOOR WARNING. AT APPROXIMATELY 800' AGL THEY EXPERIENCED A LOUD RUSH OF AIR AND A CHANGE IN THE FLIGHT CHARACTERISTICS OF THE AIRCRAFT. THE CAPTAIN STATED THAT HE INITIATED A RETURN TO SHD AND ON THE BASE LEG TO RUNWAY 23 HE TAPPED ON THE ANNUNCIATER PANEL AND THE CARGO DOOR WARNING LIGHT ILLUMINATED WITH A MASTER WARNING LIGHT. THE AIRPORT AUTHORITY TOOK PICTURES OF THE N172MJ, THE RAYTHEON BE-1900-D AIRCRAFT WHICH DEPICT THE CARGO DOOR OPEN AND POSITIONED AT AN 11:00 ON THE DORSAL FIN. PICTURES OF THE EXTERIOR CARGO DOOR HANDLE SHOWS IT IS IN THE "UNLOCKED" POSITION. AN INSPECTION OF THE DOOR LOCKING MECHANISM DID NOT REVEAL DEFECTS THAT WOULD HAVE ENABLED THE DOOR TO UNLOCK AND OPEN UP IN FLIGHT.