NOSE GEAR ON BE76 COLLAPSES DURING TKOF ROLL OF TOUCH-AND-GO FOLLOWING LNDG WITH SIMULATED ENG FAILURE.

Narrative

LOCAL TRAINING FLT REMAINED IN GEU'S TFC PATTERN. AFTER COMPLETING NORMAL SIMULATED SINGLE ENG PATTERN; GEAR WAS VERIFIED DOWN AND LOCKED. AFTER NORMAL TOUCHDOWN WITH CORRECT PITCH ATTITUDE; STUDENT DECELERATED THE ACFT TO A FAST TAXI PACE TO SIMULATE A SHORT RWY. SUBSEQUENTLY; STUDENT RETRACTED THE FLAPS; VISUALLY CONFIRMED THEM UP; RETURNED THE R PROP LEVER TO FULL FORWARD; AND ADVANCED THE THROTTLES SLOWLY TO MAX PWR. DURING THIS TIME; THE NOSE GEAR COLLAPSED DESPITE BACK ELEVATOR ON MY PART. I HAD BEEN SATISFIED THAT STUDENT HAD RETRACTED THE FLAPS AND WAS NOT INADVERTENTLY RAISING THE GEAR. THUS; WAS PRIMARILY AT THIS POINT CONCERNED WITH ENG PERFORMANCE AND ACFT CTRLINE CTL. TO MY RECOLLECTION; STUDENT WAS HANDLING THE THROTTLES WHEN THE GEAR COLLAPSED. AT NO POINT DID I SEE ANY ATTEMPT TO OPERATE THE GEAR SELECTOR AT THAT PHASE OF THE TKOF AND THE STUDENT CONFIRMS THAT HE DID NOT OPERATE THE SELECTOR. ACFT DAMAGE WAS THE FOLLOWING: BOTH PROPS BENT; SHOCK LOADED ENGS AND MINOR DAMAGE TO THE UNDERSIDE OF THE NOSE SECTION. NO INJURIES. NOTED NO FUEL LEAKS OR SMELLS AND SHUT DOWN ACFT ON RWY.