Narrative:

I was advised by captain inbound gdl that pur, his alternate, was closed. I then rechked NOTAMS and saw there was a NOTAM stating runway 4-22 closed oct/xa/98 XB00Z, rendering the airport unsuitable as alternate. I was able to change alternate to bjx while flight was en route. I don't remember seeing NOTAM in system when I updated prior to calculation time, but it was there when the release calculated. In looking at flight paperwork, there is no way to determine when NOTAM was actually input into system, but there should be. I've run into similar sits before when dealing with international NOTAMS, as I believe it takes manual action once a NOTAM or cancellation is received by their system. Hence the possible time lag from when the mexican auths input the NOTAM to when I had access to it.

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Original NASA ASRS Text

Title: ACR DISPATCH WAS NOTIFIED THAT THE ISSUED ALTERNATE ARPT FOR THE FLT WAS CLOSED.

Narrative: I WAS ADVISED BY CAPT INBOUND GDL THAT PUR, HIS ALTERNATE, WAS CLOSED. I THEN RECHKED NOTAMS AND SAW THERE WAS A NOTAM STATING RWY 4-22 CLOSED OCT/XA/98 XB00Z, RENDERING THE ARPT UNSUITABLE AS ALTERNATE. I WAS ABLE TO CHANGE ALTERNATE TO BJX WHILE FLT WAS ENRTE. I DON'T REMEMBER SEEING NOTAM IN SYS WHEN I UPDATED PRIOR TO CALCULATION TIME, BUT IT WAS THERE WHEN THE RELEASE CALCULATED. IN LOOKING AT FLT PAPERWORK, THERE IS NO WAY TO DETERMINE WHEN NOTAM WAS ACTUALLY INPUT INTO SYS, BUT THERE SHOULD BE. I'VE RUN INTO SIMILAR SITS BEFORE WHEN DEALING WITH INTL NOTAMS, AS I BELIEVE IT TAKES MANUAL ACTION ONCE A NOTAM OR CANCELLATION IS RECEIVED BY THEIR SYS. HENCE THE POSSIBLE TIME LAG FROM WHEN THE MEXICAN AUTHS INPUT THE NOTAM TO WHEN I HAD ACCESS TO IT.

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.