Narrative:

While climbing through 9;500 ft we got a master caution indicating that the aft cargo compartment door was not secure. We confirmed it on the doors page on the mfd and ran the appropriate QRH checklist. At the time of the indication we were cleared to climb to 15;000 ft and I notified ATC just prior to reaching 11;000 that we would need to descend back down to 10;000 and I declared an emergency for the door indication and told them we would be returning for landing. Once level at 10;000 ft we confirmed that the aircraft pressurization was holding but because we could not verify the security of the cargo door we continued with the checklist which called for us to depressurize the aircraft. We got radar vectors for the ILS and landed without incident and taxied to the gate.

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Original NASA ASRS Text

Title: Turboprop Captain experiences aft cargo door warning climbing through 9;500 FT. QRH procedures are complied with and flight returns to departure airport.

Narrative: While climbing through 9;500 FT we got a Master Caution indicating that the Aft Cargo compartment door was not secure. We confirmed it on the Doors page on the MFD and ran the appropriate QRH checklist. At the time of the indication we were cleared to climb to 15;000 FT and I notified ATC just prior to reaching 11;000 that we would need to descend back down to 10;000 and I declared an emergency for the door indication and told them we would be returning for landing. Once level at 10;000 FT we confirmed that the aircraft pressurization was holding but because we could not verify the security of the cargo door we continued with the checklist which called for us to depressurize the aircraft. We got radar vectors for the ILS and landed without incident and taxied to the gate.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.