Large Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 14
Communication Breakdown; Confusion; Situational Awareness; Training / Qualification
ATC Issue All Types; Airspace Violation All Types; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Human Factors; Procedure
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.
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.