B737 Next Generation Undifferentiated
Air Traffic Control Fully Certified
Air Traffic Control Radar 30
Communication Breakdown
Conflict Airborne Conflict; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance
General None Reported / Taken
Chart Or Publication; Human Factors; Procedure
The flight had been level for some time at the published altitude 11000 FT. I reduced his speed to 220 KTS and issued crossing traffic climbing to 10000 FT. The flight crew acknowledged the traffic and began descending into him. I do not believe we ever had less than standard separation; but I would love to know why a pilot would ever descend into traffic he just acknowledged.This is one of a constant stream of pilots that fail to comply with the published crossing altitudes on the new OAPM [Optimization of Airspace and Procedures in the Metroplex] procedures. They [the procedures] need to be immediately terminated until the real source of the problem can be identified and corrected. This is a safety hazard.
Following a B737NG flight crew's descent toward traffic climbing below them about which they had just advised; a D10 Approach Controller lamented the frequent failure of flight crews to comply with crossing restrictions as published in the new OAPM arrival.