A319 flight crew has a TCAS RA during descent vicinity of mmun.

Attributes
ACN	698613
Time
Date	200605
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mmid.artcc
State Reference	FO
Altitude	msl single value : 34000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : mmid.artcc
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Route In Use	enroute airway : b646.airway
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : mmid.artcc
Operator	common carrier : air carrier
Make Model Name	Airbus Industrie Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 17000 flight time type : 2600
ASRS Report	698613
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : returned to original clearance flight crew : took evasive action
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Problem Areas	ATC Human Performance Airspace Structure Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

Inbound to cancun on B646 between robin and alori intxns; merida center frequency; controller very busy; lots of spanish -- controllers english very poor. We got a descent clearance from FL380 to FL280. Passing approximately FL345; got a TCAS TA; quickly followed by RA. Acquired other aircraft visually and aircraft passed behind and below us. Other aircraft was an air carrier Y airbus. Air carrier Y called ATC with a long dialogue in spanish. The merida controller replied 'correcto.' controller said nothing to us. We continued our descent to FL280.

Original NASA ASRS Text

Title: A319 FLT CREW HAS A TCAS RA DURING DSCNT VICINITY OF MMUN.

Narrative: INBOUND TO CANCUN ON B646 BTWN ROBIN AND ALORI INTXNS; MERIDA CTR FREQ; CTLR VERY BUSY; LOTS OF SPANISH -- CTLRS ENGLISH VERY POOR. WE GOT A DSCNT CLRNC FROM FL380 TO FL280. PASSING APPROX FL345; GOT A TCAS TA; QUICKLY FOLLOWED BY RA. ACQUIRED OTHER ACFT VISUALLY AND ACFT PASSED BEHIND AND BELOW US. OTHER ACFT WAS AN ACR Y AIRBUS. ACR Y CALLED ATC WITH A LONG DIALOGUE IN SPANISH. THE MERIDA CTLR REPLIED 'CORRECTO.' CTLR SAID NOTHING TO US. WE CONTINUED OUR DSCNT TO FL280.

Data retrieved from NASA's ASRS site as of January 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.