CARGO DOOR SEPARATED FROM SMT DURING TKOF.

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I PREFLT INSPECTED THE AIRPLANE WHICH INCLUDED A PHYSICAL CHK OF ALL BAGGAGE DOORS (WHICH WERE LATCHED AND PROPERLY SECURED). I THEN TAXIED TO THE FULL LENGTH OF RWY 9 (9500' OF RWY). AFTER RECEIVING TKOF CLRNC; I BEGAN A NORMAL TKOF. AT APPROX 95 KTS; I BEGAN TO ROTATE THE AIRPLANE. ALMOST IMMEDIATELY THE RIGHT NOSE BAGGAGE DOOR SEPARATED AND XED IN FRONT OF THE WINDSHIELD AND PASSED OFF THE LEFT SIDE BTWN THE LEFT ENG AND FUSELAGE. THE ACFT WAS ABOUT 5-10' IN THE AIR WHEN THIS OCCURRED. THERE WAS NO PRIOR INDICATIONS OF ANY SORT THAT THE DOOR WAS ABOUT TO SEPARATE. AFTER ASSURING THAT THE ACFT WAS IN CTL AND A SAFE LNDG WAS POSSIBLE WITH THE REMAINING RWY; I REDUCED PWR AND ABORTED THE TKOF. I THEN INFORMED THE CTL TWR OF MY INTENTIONS AND A SAFE LNDG WAS MADE. AFTER CLRING THE RWY; I INFORMED GND CTL THAT THE BAGGAGE DOOR SEPARATED AND WAS PROBABLY STILL ON THE RWY NEAR THE C6 INTXN. THEY INFORMED ME THAT IT WOULD BE RETRIEVED AND DELIVERED TO THE GATE AND THEN I PROCEEDED TO THE GATE. AFTER SECURING THE ACFT; I THEN TELEPHONED THE FLT COORDINATOR IN MANHATTAN AND INFORMED HIM OF THE SITUATION (AS PER COMPANY POLICY). HE THEN INFORMED THE APPROPRIATE PERSONNEL/AUTHORITIES OF THE SITUATION. I THEN PROCEEDED TO RECORD THE MECHANICAL IRREGULARITY IN THE MECHANICAL DISCREPANCY RPT FORM IN THE AAIP LOGBOOK (AS PER COMPANY POLICY). THIS ACTION PREVENTS AN ACFT FROM BEING FLOWN UNTIL A REPAIR IS MADE OR A FERRY PERMIT IS ISSUED AND AN ENTRY IS MADE ON FORM. THE DOOR WAS THEN RETURNED AND UPON INSPECTION; I NOTICED THE ZEUS FASTENER WAS MISSING AND ENTERED THIS INFO ON FORM . THIS FASTENER IS USED INSTEAD OF LOCKING THE BAGGAGE DOORS WITH A KEY. I BELIEVE THAT THIS INCIDENT IS A DIRECT RESULT OF IMPROPERLY ADJUSTED DOOR LATCHES OR A FAILURE OF THESE LATCHES. AND; DUE TO THE MISSING ZEUS FASTENER; I BELIEVE THAT THIS DEVICE ALSO FAILED. FINALLY; TO PREVENT A RECURRENCE; MAINT SHOULD ROUTINELY CHK FOR PROPER ADJUSTMENTS AND WEAR ON ALL COMPONENTS ASSOCIATED WITH THE BAGGAGE COMPARTMENTS. ALSO; A DOOR WARNING LIGHT SHOULD BE INSTALLED WITH MICROSWITCHES ALERTING THE PLT IF THE LATCHES FAIL. THIS WOULD BE HELPFUL IF THE LATCHES FAILED WHILE TAXIING. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: CAMLOCKS HAD BEEN ADDED BY THE AIRLINE SO THAT THE DOORS WOULD NOT HAVE TO BE LOCKED WITH A KEY. THE CAMLOCKS WERE WORN AND WERE MISSING WHEN THE DOOR WAS RETRIEVED. THE RPTR INSISTS THAT HE HAD CHKED THE CAMLOCKS DURING PREFLT AND THEY WERE PROPERLY LOCKED. THE FAA INVESTIGATED THE INCIDENT AND DROPPED THE CASE. THE ACFT COMES EQUIPPED WITH A DOOR HOLD OPEN MECHANISM. THIS MECHANISM WAS MISSING ON THIS ACFT AND THE DOOR WAS PROPPED OPEN WITH A STICK. DOORS HAVE COME OPEN ON SIMILAR ACFT WITH THE ACR; BUT THE DOOR STAYED WITH THE ACFT DUE TO THE DOOR HOLD OPEN MECHANISM LIMITING DOOR TRAVEL.