B737 captain reported failing to comply with a crossing restriction on the new comix 1 STAR.

Attributes
ACN	1439430
Time
Date	201704
Local Time Of Day	1201-1800
Place
Locale Reference	SAN.Airport
State Reference	CA
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR COMIX1
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 127
Events
Anomaly	ATC Issue All Types Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Undershoot Deviation - Procedural Clearance

Narrative:

We were descending on the new comix 1 STAR. Center started us down late. We had a 70 knot tailwind and center directed us to fly 270 knots. All these reasons prevented us from making the crossing restriction we were given. We notified center we would not make it as soon as we determined that it was not possible; and the controller asked us why not. We told him. He questioned our reasons as if they were not valid; and then said nothing; thus producing the situation that we did not make an altitude restriction without having relief from ATC.the older bayvu arrival and the new comix arrival have crossing restrictions that are very hard to make with the airspeed and altitude requirements; especially with a tailwind. They should be revised to have more reasonable restrictions.

Original NASA ASRS Text

Title: B737 Captain reported failing to comply with a crossing restriction on the new COMIX 1 STAR.

Narrative: We were descending on the new COMIX 1 STAR. Center started us down late. We had a 70 knot tailwind and Center directed us to fly 270 knots. All these reasons prevented us from making the crossing restriction we were given. We notified Center we would not make it as soon as we determined that it was not possible; and the Controller asked us why not. We told him. He questioned our reasons as if they were not valid; and then said nothing; thus producing the situation that we did not make an altitude restriction without having relief from ATC.The older BAYVU Arrival and the new COMIX Arrival have crossing restrictions that are very hard to make with the airspeed and altitude requirements; especially with a tailwind. They should be revised to have more reasonable restrictions.

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.