An air carrier pilot notes that the commercial chart for the MMMX airport does not depict taxiway aa...

Attributes
ACN	777006
Time
Date	200803
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mmmx.airport
State Reference	FO
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	777006
Events
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Airport Chart Or Publication
Primary Problem	Chart Or Publication
Situations
Chart	airport : mmmx.airport

Narrative:

Previously debriefed about a year ago. Current MMMX airport diagram page fails to depict taxiway aa which is an approach end extension of runway 5R. After my first debrief of this commercial chart co did manage to correctly depict the taxiway; but I see they have dropped it out again. In my previous debrief I mention almost taxiing through taxiway aa one night last year when it was not shown on my airport page that night. Sets up for a runway incursion.callback conversation with reporter revealed the following information: reporter stated that on a night taxi to runway 5R his crew was told to hold short of taxiway aa approaching runway 5R. The crew saw no aa taxiway and mistook taxiway A4 for aa while reading the chart in a dark cockpit. Not seeing taxiway aa at the approach end of runway 5R could have caused a taxiway incursion at the approach end of that runway on taxiway A1 since a pilot may not know that it exists.

Original NASA ASRS Text

Title: AN ACR PLT NOTES THAT THE COMMERCIAL CHART FOR THE MMMX ARPT DOES NOT DEPICT TXWY AA AT THE APCH END OF RWY 5R BETWEEN TXWYS A AND A4.

Narrative: PREVIOUSLY DEBRIEFED ABOUT A YEAR AGO. CURRENT MMMX ARPT DIAGRAM PAGE FAILS TO DEPICT TXWY AA WHICH IS AN APCH END EXTENSION OF RWY 5R. AFTER MY FIRST DEBRIEF OF THIS COMMERCIAL CHART CO DID MANAGE TO CORRECTLY DEPICT THE TXWY; BUT I SEE THEY HAVE DROPPED IT OUT AGAIN. IN MY PREVIOUS DEBRIEF I MENTION ALMOST TAXIING THROUGH TXWY AA ONE NIGHT LAST YEAR WHEN IT WAS NOT SHOWN ON MY ARPT PAGE THAT NIGHT. SETS UP FOR A RWY INCURSION.CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT ON A NIGHT TAXI TO RWY 5R HIS CREW WAS TOLD TO HOLD SHORT OF TXWY AA APCHING RWY 5R. THE CREW SAW NO AA TXWY AND MISTOOK TXWY A4 FOR AA WHILE READING THE CHART IN A DARK COCKPIT. NOT SEEING TXWY AA AT THE APCH END OF RWY 5R COULD HAVE CAUSED A TXWY INCURSION AT THE APCH END OF THAT RWY ON TXWY A1 SINCE A PLT MAY NOT KNOW THAT IT EXISTS.

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.

An air carrier pilot notes that the commercial chart for the MMMX airport does not depict taxiway aa at the approach end of runway 5R between txwys a and A4.