Narrative:

Missing NOTAMS for mexico airports. Luckily; no incidents have taken place that I am aware of. 2-4 times per week; there is at least one NOTAM missing/removed that is still in effect for tam; gdl; or slp. Some are of little importance; an FBO ramp closed; etc. However; lately there have been some missing that are still in effect; and safety related. The only runway we use is closed today for nearly 4 hours. Though not during a scheduled arrival; it still is possible for alternate use during that time. Another NOTAM that is in effect until next year is the lack of weather service after XA00Z each day. Once again; this is not during our scheduled arrival time; but a major factor for alternate planning and actually landing there. Each day before I dispatch to any of the mexico airports on my desk; I go to the FAA website and review the NOTAMS for tam; gdl; and slp. I also review any alternate airport NOTAMS that I use. I then manually correct them. I do not know why these are removed or not input in a timely manner after transmission. The responsible department needs to address this; as I don't believe that all the dispatchers are aware of this shortcoming; and trust what they see in the air carrier's computer system.

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Original NASA ASRS Text

Title: AN ACR DISPATCHER REPORTS THAT MEXICAN ARPT NOTAMS HAVE VALID NOTAMS NOT DISPLAYED; AND THE SYSTEM IS GENERALLY UNRELIABLE.

Narrative: MISSING NOTAMS FOR MEXICO AIRPORTS. LUCKILY; NO INCIDENTS HAVE TAKEN PLACE THAT I AM AWARE OF. 2-4 TIMES PER WEEK; THERE IS AT LEAST ONE NOTAM MISSING/REMOVED THAT IS STILL IN EFFECT FOR TAM; GDL; OR SLP. SOME ARE OF LITTLE IMPORTANCE; AN FBO RAMP CLOSED; ETC. HOWEVER; LATELY THERE HAVE BEEN SOME MISSING THAT ARE STILL IN EFFECT; AND SAFETY RELATED. THE ONLY RUNWAY WE USE IS CLOSED TODAY FOR NEARLY 4 HOURS. THOUGH NOT DURING A SCHEDULED ARRIVAL; IT STILL IS POSSIBLE FOR ALTERNATE USE DURING THAT TIME. ANOTHER NOTAM THAT IS IN EFFECT UNTIL NEXT YEAR IS THE LACK OF WEATHER SERVICE AFTER XA00Z EACH DAY. ONCE AGAIN; THIS IS NOT DURING OUR SCHEDULED ARRIVAL TIME; BUT A MAJOR FACTOR FOR ALTERNATE PLANNING AND ACTUALLY LANDING THERE. EACH DAY BEFORE I DISPATCH TO ANY OF THE MEXICO AIRPORTS ON MY DESK; I GO TO THE FAA WEBSITE AND REVIEW THE NOTAMS FOR TAM; GDL; AND SLP. I ALSO REVIEW ANY ALTERNATE AIRPORT NOTAMS THAT I USE. I THEN MANUALLY CORRECT THEM. I DO NOT KNOW WHY THESE ARE REMOVED OR NOT INPUT IN A TIMELY MANNER AFTER TRANSMISSION. THE RESPONSIBLE DEPARTMENT NEEDS TO ADDRESS THIS; AS I DON'T BELIEVE THAT ALL THE DISPATCHERS ARE AWARE OF THIS SHORTCOMING; AND TRUST WHAT THEY SEE IN THE ACR'S COMPUTER SYSTEM.

Data retrieved from NASA's ASRS site as of May 2009 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.