A B757 CREW EXCEEDS SPD RESTR ON DEP FROM MMX.

Narrative

WE DEPARTED RWY 23L ON THE PINOS 2 DEP. DEP CTL ASKED US OUR SPD JUST AFTER WE HAD PASSED THE PLAZA NB WHILE WE WERE IN OUR TURN TO INTERCEPT THE APAN 059 DEG RADIAL. WE RESPONDED THAT WE WERE AT 250 KTS; AND HE ASKED IF TWR HAD RESCINDED THE 180 KT SPD LIMIT PRIOR TO REACHING PLAZA. WE REPLIED IN THE NEGATIVE AND STATED THAT WE HAD MISSED SEEING THIS RESTR ON THE SID. HE THEN REPLIED THAT THE RESTR WAS TO AVOID CONFLICT WITH THE DEPARTING ACFT IN FRONT OF US. WE APOLOGIZED; AND HE INSTRUCTED US TO CONTINUE ON COURSE AT OUR PRESENT SPD. WE HAD VISUAL AS WELL AS TCASII CONTACT WITH THE ACFT IN FRONT OF US AND AT NO TIME POSED ANY DANGER TO HIM OR US. WE DID NOT HAVE TO MANEUVER NOR WERE WE VECTORED BY DEP CTL TO AVOID OTHER TFC. DEP CTL DID NOT SAY THAT THEY WOULD FILE A VIOLATION AGAINST US; THEIR MANNER BEING CORDIAL AND INFORMATIVE IN NATURE. WE MISSED THE AIRSPD RESTR BOTH ON THE DEP AND THE COMPANY PAGE. COMPLACENCY ON MY PART (I HAVE FLOWN INTO MEX MANY TIMES AND JUST DIDN'T REVIEW THE INFO CAREFULLY ENOUGH) AND DISTRS FROM 2 APU SHUTDOWNS IN THE 30 MINS PRIOR TO PUSHBACK. AFTER STARTING THE FIRST ENG; THE APU AGAIN QUIT. THE FINAL DISTR WAS A CHANGE IN RWYS FROM RWY 5L TO RWY 23L. A MORE THOROUGH REVIEW OF BOTH THE DEP AND OUR COMPANY'S SUPPLEMENTAL INFO WOULD HAVE PREVENTED THIS OVERSPD. SUPPLEMENTAL INFO FROM ACN 455405: FO WAS LOADING THE FMS AND THE CAPT WAS WORKING WITH MAINT ON AN APU PROB. THE APU SHUT DOWN TWICE DURING GND OPS AND CONCERNED US. WITH ABOUT 10 MINS TO GO BEFORE DEP; THE CAPT WAS BACK IN THE SEAT READY FOR CHKLISTS. I TUNED UP ATIS AND FOUND THE RWY HAD CHANGED -- WE HAD PLANNED A RWY 5 DEP; NOW IT WAS RWY 23. I NEED TO SAY THIS WAS MY FIRST TIME IN MEXICO CITY AND I'VE BEEN ON THE B767 FOR 3 MONTHS. PRIOR TO THAT I FLEW AS AN FE FOR 9 YRS. I CHANGED THE RWY IN THE FMS AND STARTED TO LOOK AT THE DEP THE PINOS 2. AT THE SAME TIME; THE CAPT WANTED TO READ THE CHKLIST AND START AN ENG AT THE GATE (THE APU WAS NOW RUNNING BUT HE WAS AFRAID IT WOULD QUIT AGAIN). SO I PUT AWAY THE DEP AND DID THAT. WE PUSHED BACK WITH 1 ENG RUNNING AND THE APU FAILED. WE NOW HAD TO COORDINATE FOR A XBLEED START; GET APPROVAL FROM FLT CTL FOR DISPATCH WITHOUT APU; RUN CHKLISTS. I WAS VERY BUSY. WE FINALLY GOT TO THE END OF THE RWY AND HAD JUST COMPLETED ALL CHKLISTS. MEXICO CITY TWR CLRED US FOR TKOF. OUR FMS POS DID NOT AGREE WITH RWY POS; SO I COULD NOT RELY ON LNAV. THE CAPT HAD A HABIT OF KEEPING HIS VOR IN MANUAL INSTEAD OF AUTO-TUNE. WE TOOK OFF AND I MISSED AN AIRSPD RESTR ON 180 KTS ON THE SID. I HAD ACCELERATED TO 250 KTS WHEN DEP QUERIED US ON OUR SPD. NO CONFLICT OCCURRED. I JUST VIOLATED A SPD RESTR.