ENG EXPLODES AT 70-80 KTS; TKOF ABORTED.

Narrative

ENG START; TAXI; AND BEFORE TKOF ITEMS HAD BEEN COMPLETED IN A SLOW THOROUGH MANNER BECAUSE OF THE SHORT TAXI TO RWY 24L AND THE NEED FOR A COMPLETE PAX BRIEFING USING THE VIDEO SYS ON THE ACFT. ALL ACFT SYSTEMS AND ENG INSTS WERE NORMAL DURING ENG START AND TAXI. FO WAS FLYING THIS LEG. I GAVE THE ACFT TO HIM ON THE RWY. HE HAD ADVANCED THE THROTTLES; 'TOGAED' AND CALLED FOR BALANCED THRUST; WHICH I CHKED AT ABOUT 89.X% AS REQUESTED AND DISPLAYED ON THE FMC FOR REDUCED PWR. JUST AS I WAS CALLING 'PWR SET' (APPROX 70-80 KTS) WE HEARD A LOUD EXPLOSION; FELT THE ENTIRE AIRFRAME SHUDDER AND BEGIN VEERING TO THE R. WITH MY HANDS ON THE THROTTLES; I IMMEDIATELY CALLED 'REJECT;' INITIATED THE REJECT PROC AND PUT THE ACFT BACK ON CTRLINE. MY EYES WERE JUST LEAVING THE CTR INST PANEL WHEN THE EXPLOSION OCCURRED SO I WAS ABLE TO DETECT THE R ENG INSTS DEVIATING FROM NORMAL AND THE EGT OVERTEMP LIGHT ILLUMINATE. DURING THE REJECT I DID GLANCE AT THE ENG INSTS AGAIN AND NOTED THE EGT AT 1100 DEG. AS I WAS COMPLETING THE REJECT PROC FO WAS CALLING THE TWR AND ASKING FOR THE EMER EQUIP. THE CTLRS HAD SEEN THE EXPLOSION AND ROGERED. WHEN THE ACFT CAME TO A STOP I HAD COMPLETED THE ENG FAILURE CHKLIST. I INITIATED A FIRE WARNING TEST AND EXPELLED THE L BOTTLE INTO THE R ENG AS A PRECAUTION. FO AND I HAD COMPLETED THE STEPS FOR EMER EVAC. HOWEVER; I ADVISED THE FLT ATTENDANTS AND PAXS TO REMAIN SEATED WITH A VERY BRIEF EXPLANATION. I SAW NO REASON TO EVAC AT THAT POINT IN TIME WITHOUT SECONDARY INDICATIONS OF FURTHER ACFT DAMAGE. THE FLT ATTENDANTS RPTED THAT CONDITIONS AFT WERE NORMAL EXCEPT FOR VERY LIGHT AIR CONDITIONING HAZE. FO AND I COMPLETED THE ENG FAILURE CHKLIST AND CALLED LAX OPS TO ADVISE THEM. THE ACFT REMAINED SURROUNDED BY EMER EQUIP ON 24L WITH APPROX 7500 FT REMAINING UNTIL MAINT INSPECTED THE ACFT.