MLG WAS UNABLE TO COMPLY WITH RESTRICTIONS OF THE PROFILE DESCENT PROC.

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150 MI OUT OF LAX; CENTER ASKED US FOR OUR BEST FORWARD SPD FOR SPACING. DSCNT FROM CRUISE ALT (FL350) WAS PLANNED ACCORDINGLY AT 350 KTS. AS WE PROCEEDED WE WERE REPEATEDLY SLOWED: 280 KTS; 250 KTS AND FINALLY 210 KTS APPROX 60 MI OUT ON THE TWENTYNINE PALMS RWY 25 PROFILE DSCNT. WE ADVISED CENTER WE COULD NOT MAKE THE FL180 RESTRICTION AT CIVET AND THEY OK'D THE DEVIATION. AT APPROX 47 DME I REALIZED THAT EVEN WITH THE USE OF THE SPEEDBRAKE; WE WERE GOING TO BE HIGH AT ARNES. NO PROB; I THOUGHT; I'LL JUST NOTIFY APCH THAT WE CAN'T MAKE THE RESTRICTION. CENTER HANDED US OFF TO APCH ABOUT 2 MI LATER (45 DME); BUT THE FREQ WAS SO BUSY WE NEVER GOT TO TALK TO THE CTLR PRIOR TO REACHING ARNES 3000' ABOVE THE XING ALT. THE CTLR NEVER SAID ANYTHING; BUT WE DID BUST THE RESTRICTION. HAD I KNOWN THE FREQ WAS JAMMED UP; I COULD HAVE USED THE SPEEDBRAKE SOONER OR EVEN THE LNDG GEAR AS A LAST RESORT. I EXPECTED TO BE ABLE TO RESOLVE BY TALKING IT OVER WITH THE CTLR. NEXT TIME I WON'T HANG MYSELF OUT LIKE THAT.