ZAB controller describes transferring communications of one aircraft to mazatlan center; and then se...

Narrative:

Aircraft X was southbound from cylw to mmpr. The aircraft was level at FL370. As per the procedure entering mazatlan (mmzt) center; the flight plan was verified; radar services were terminated; and the aircraft was shipped to mmzt center approximately 15 miles north of mexican airspace. A couple minutes later I noticed the aircraft still in my airspace climbing without prior coordination. There were no other aircraft in the vicinity so separation was never lost. There has been an increasing problem of mmzt center climbing or descending aircraft without coordination prior to entering their airspace.a better understanding of procedures and rules between the two nation's air traffic systems would be helpful. There is no way to prevent deviations with mmzt center. We have tried supervisor to supervisor conversations and the occurrences keep happening more frequently. A formal way to discuss issues and consequences needs to be set up.

Original NASA ASRS Text

Title: ZAB Controller describes transferring communications of one aircraft to Mazatlan Center; and then sees the aircraft climb without coordination from MMZT ARTCC. No separation problems were noted. Controller states there is an increase of these problems with MMZT ARTCC.

Narrative: Aircraft X was southbound from CYLW to MMPR. The aircraft was level at FL370. As per the procedure entering Mazatlan (MMZT) Center; the flight plan was verified; radar services were terminated; and the aircraft was shipped to MMZT Center approximately 15 miles north of Mexican airspace. A couple minutes later I noticed the aircraft still in my airspace climbing without prior coordination. There were no other aircraft in the vicinity so separation was never lost. There has been an increasing problem of MMZT Center climbing or descending aircraft without coordination prior to entering their airspace.A better understanding of procedures and rules between the two nation's air traffic systems would be helpful. There is no way to prevent deviations with MMZT Center. We have tried supervisor to supervisor conversations and the occurrences keep happening more frequently. A formal way to discuss issues and consequences needs to be set up.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1227968
Time
Date	201412
Local Time Of Day	1801-2400
Place
Locale Reference	ZAB.ARTCC
State Reference	NM
Aircraft 1
Make Model Name	Large Transport
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 14
Events
Anomaly	ATC Issue All Types Airspace Violation All Types Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

ZAB controller describes transferring communications of one aircraft to mazatlan center; and then sees the aircraft climb without coordination from mmzt ARTCC. No separation problems were noted. Controller states there is an increase of these problems with mmzt ARTCC.