Narrative:

The captain worked on the flight plan and fuel order while I got the inside of the aircraft ready and took care of the pre-flight checks. I read through the aircraft logbook to make sure there were no open write ups. The baggage door annunciator had been written up the previous night. The baggage door had been worked on and signed off as ops check good.upon closing the baggage door after connecting the battery I noticed the annunciation was extinguished. The pre-flight checks were completed and the baggage door was opened to place crew bags inside. Upon closing the baggage door I entered the cockpit to check the baggage door annunciator. It was now illuminated. The captain and I opened the baggage door and found the forward micro switch pin was stuck in the depressed position. The captain then called maintenance control to have the mechanic return to the aircraft to check this out.the pin and switch were cleaned and when the baggage door was closed the annunciator extinguished. I then opened and closed the door a few times to make sure the annunciator remained extinguished when the door was closed. We then proceeded with our trip. About 20 minutes into the flight the baggage door [light] came on intermittently. The captain flew the plane and worked the radios while I read the checklist. The captain then transferred the radios and the controls to me and made a phone call to maintenance control. We were asked to return to our departure airport by maintenance control. I contacted center and made this request. The airplane controls were then transferred back to the captain and I continued my duties as pilot not flying.we decided it was best to keep the left engine running due to the previous history of the baggage door annunciator intermittently turning on and off. No emergency was declared. The other purpose for keeping the left engine running was due to a high terrain environment; high altitude airport; high temperature; and the possibility of needing full power on a go around should the need arise. The speed of the aircraft was reduced and the altitude was reduced when cleared to do so. A normal landing was made in apa.

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Original NASA ASRS Text

Title: Despite repeated maintenance attention to the cargo door warning micro switch prior to departure; the P-180 Flight Crew received a cargo door warning light 20 minutes after takeoff from a high altitude airport. After consultation with Maintenance they returned to their departure airport; opting to not comply with the checklist requirement that the aft mounted left engine be shut down due to its propiquity to the door.

Narrative: The Captain worked on the flight plan and fuel order while I got the inside of the aircraft ready and took care of the pre-flight checks. I read through the aircraft logbook to make sure there were no open write ups. The baggage door annunciator had been written up the previous night. The baggage door had been worked on and signed off as ops check good.Upon closing the baggage door after connecting the battery I noticed the annunciation was extinguished. The pre-flight checks were completed and the baggage door was opened to place crew bags inside. Upon closing the baggage door I entered the cockpit to check the baggage door annunciator. It was now illuminated. The Captain and I opened the baggage door and found the forward micro switch pin was stuck in the depressed position. The Captain then called Maintenance Control to have the Mechanic return to the aircraft to check this out.The pin and switch were cleaned and when the baggage door was closed the annunciator extinguished. I then opened and closed the door a few times to make sure the annunciator remained extinguished when the door was closed. We then proceeded with our trip. About 20 minutes into the flight the baggage door [light] came on intermittently. The Captain flew the plane and worked the radios while I read the checklist. The Captain then transferred the radios and the controls to me and made a phone call to Maintenance Control. We were asked to return to our departure airport by Maintenance Control. I contacted Center and made this request. The airplane controls were then transferred back to the Captain and I continued my duties as pilot not flying.We decided it was best to keep the left engine running due to the previous history of the baggage door annunciator intermittently turning on and off. No emergency was declared. The other purpose for keeping the left engine running was due to a high terrain environment; high altitude airport; high temperature; and the possibility of needing full power on a go around should the need arise. The speed of the aircraft was reduced and the altitude was reduced when cleared to do so. A normal landing was made in APA.

Data retrieved from NASA's ASRS site as of July 2013 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.