Narrative:

Shortly after takeoff from cos, after retracting the gear, we had a yellow gear door light and a right red main gear light. We leveled at 10000 ft and asked for a heading. After completed the procedure we talked to maintenance and dispatch. We still had both lights after the procedure and decided, with air carrier maintenance and dispatch, to continue the flight. Dispatch rereleased us to ZZZ with an alternate of xyz. We did not declare an emergency but did ask for the emergency equipment standing by in ZZZ. We advised ZZZ approach we anticipated a normal landing, but if the gear door remained open we would need to stop on the runway (according to procedure) to have maintenance close the door prior to taxi. After extending the gear, we received normal indications and advised the tower we would have a normal landing. After landing, we were requested to contact the tower supervisor on a landline. The captain called and told me the supervisor suggested that in the future it would be advisable to declare an emergency to facilitate traffic flow and emergency equipment. Callback conversation with reporter revealed the following information: the reporter stated on landing at ZZZ all landing gear indications were normal. The reporter said with the yellow door light and the red right main gear unsafe light there were no vibrations or noise to indicate the door was open but cannot be certain it was a false warning. The reporter stated that maintenance has not advised the crew of the fix.

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Original NASA ASRS Text

Title: AN MD80, AFTER TKOF AND RETRACTING THE LNDG GEAR, HAD THE R MAIN GEAR RED UNSAFE LIGHT AND YELLOW LNDG GEAR DOOR LIGHT. CAUSE UNKNOWN.

Narrative: SHORTLY AFTER TKOF FROM COS, AFTER RETRACTING THE GEAR, WE HAD A YELLOW GEAR DOOR LIGHT AND A R RED MAIN GEAR LIGHT. WE LEVELED AT 10000 FT AND ASKED FOR A HDG. AFTER COMPLETED THE PROC WE TALKED TO MAINT AND DISPATCH. WE STILL HAD BOTH LIGHTS AFTER THE PROC AND DECIDED, WITH ACR MAINT AND DISPATCH, TO CONTINUE THE FLT. DISPATCH RERELEASED US TO ZZZ WITH AN ALTERNATE OF XYZ. WE DID NOT DECLARE AN EMER BUT DID ASK FOR THE EMER EQUIP STANDING BY IN ZZZ. WE ADVISED ZZZ APCH WE ANTICIPATED A NORMAL LNDG, BUT IF THE GEAR DOOR REMAINED OPEN WE WOULD NEED TO STOP ON THE RWY (ACCORDING TO PROC) TO HAVE MAINT CLOSE THE DOOR PRIOR TO TAXI. AFTER EXTENDING THE GEAR, WE RECEIVED NORMAL INDICATIONS AND ADVISED THE TWR WE WOULD HAVE A NORMAL LNDG. AFTER LNDG, WE WERE REQUESTED TO CONTACT THE TWR SUPVR ON A LANDLINE. THE CAPT CALLED AND TOLD ME THE SUPVR SUGGESTED THAT IN THE FUTURE IT WOULD BE ADVISABLE TO DECLARE AN EMER TO FACILITATE TFC FLOW AND EMER EQUIP. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED ON LNDG AT ZZZ ALL LNDG GEAR INDICATIONS WERE NORMAL. THE RPTR SAID WITH THE YELLOW DOOR LIGHT AND THE RED R MAIN GEAR UNSAFE LIGHT THERE WERE NO VIBRATIONS OR NOISE TO INDICATE THE DOOR WAS OPEN BUT CANNOT BE CERTAIN IT WAS A FALSE WARNING. THE RPTR STATED THAT MAINT HAS NOT ADVISED THE CREW OF THE FIX.

Data retrieved from NASA's ASRS site as of July 2007 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.