Narrative:

Pom 4 departure from ont issued by ATC clearance delivery. 19 NM west of pom VOR on 274 degree right is a restriction to cross at 14000' MSL. Altitude assigned by ATC clearance delivery was 14000' MSL. On taxi-out, ground revised assigned altitude to 10000' MSL. Upon takeoff clearance, we were assigned to maintain 5000' MSL. First departure controller said to cross pom VOR below 8000' MSL, maintain 10000' MSL. We complied. 12 NM west of pom VOR, departure said to cross 19 DME fix west of pom VOR at 14000' MSL. We were climbing through approximately 8400' MSL. I had the first officer advise departure that we could not make the restriction. He was then upset and asked if we had advised ground controllers that we could not make the restriction. The first officer replied no. We could have made the restriction if ATC had not given us the 2 previous restrictions in altitude. The 14000' crossing restriction had ben negated by ATC assigning us 10000' MSL on taxi, and then 5000' with takeoff clearance. There was no way we could have climbed from 8500' MSL to 14000' MSL in 7 mi at 164000# gross weight.

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Original NASA ASRS Text

Title: PLT WAS UNABLE TO COMPLY WITH SID RESTRICTION.

Narrative: POM 4 DEP FROM ONT ISSUED BY ATC CLRNC DELIVERY. 19 NM W OF POM VOR ON 274 DEG R IS A RESTRICTION TO CROSS AT 14000' MSL. ALT ASSIGNED BY ATC CLRNC DELIVERY WAS 14000' MSL. ON TAXI-OUT, GND REVISED ASSIGNED ALT TO 10000' MSL. UPON TKOF CLRNC, WE WERE ASSIGNED TO MAINTAIN 5000' MSL. FIRST DEP CTLR SAID TO CROSS POM VOR BELOW 8000' MSL, MAINTAIN 10000' MSL. WE COMPLIED. 12 NM W OF POM VOR, DEP SAID TO CROSS 19 DME FIX W OF POM VOR AT 14000' MSL. WE WERE CLBING THROUGH APPROX 8400' MSL. I HAD THE F/O ADVISE DEP THAT WE COULD NOT MAKE THE RESTRICTION. HE WAS THEN UPSET AND ASKED IF WE HAD ADVISED GND CTLRS THAT WE COULD NOT MAKE THE RESTRICTION. THE F/O REPLIED NO. WE COULD HAVE MADE THE RESTRICTION IF ATC HAD NOT GIVEN US THE 2 PREVIOUS RESTRICTIONS IN ALT. THE 14000' XING RESTRICTION HAD BEN NEGATED BY ATC ASSIGNING US 10000' MSL ON TAXI, AND THEN 5000' WITH TKOF CLRNC. THERE WAS NO WAY WE COULD HAVE CLBED FROM 8500' MSL TO 14000' MSL IN 7 MI AT 164000# GROSS WT.

Data retrieved from NASA's ASRS site as of July 2007 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.