C172 INSTRUCTOR PLT WITH STUDENT LOSES CTL OF ACFT ON LNDG AND STRIKES SNOW BANK AT 5G9.

Narrative

THE DUAL INSTRUCTIONAL FLT DEPARTED 5G9 FOR A LCL FLT AND LATER RETURNED TO THE ARPT TO PRACTICE TKOFS AND LNDGS. AFTER THE INSTRUCTOR DEMONSTRATED 2 XWIND LNDGS WITH THE STUDENT PLT PRIMARILY ON THE CTLS FOR THE TKOFS; THE INSTRUCTOR ELECTED TO HAVE THE STUDENT ON THE CTLS FOR THE NEXT LNDG WITH THE INSTRUCTOR TALKING THE STUDENT THROUGH THE FLARE; TOUCHDOWN; AND ROLLOUT. UPON TOUCHING DOWN AT NORMAL SPD ON THE ICE-PATCHED 50-FT WIDE RWY; THE ACFT DRIFTED R OF CTRLINE WITH A CONTRIBUTION FROM A 9 KT L XWIND. ATTEMPTS BY THE INSTRUCTOR TO CORRECT DRIFT WITH AILERON; RUDDER; AND BRAKES HAD LITTLE EFFECT AND THE R MAIN WHEEL ENTERED A 2 FT HIGH SNOW DRIFT AT THE RWY EDGE. THE ACFT; TRAVELING APPROX 25 KTS; PIVOTED SHARPLY TO THE R ABOUT THE R MAIN WHEEL; AFTER TRAVELING A FEW YARDS. THE L MAIN WHEEL STOPPED ABRUPTLY AT THE EDGE OF THE PACKED SNOWDRIFT WITH THE ACFT MOMENTUM SHARPLY PITCHING THE NOSE DOWN AND ROLLING THE L WING DOWN WITH THE R MAIN WHEEL BRIEFLY LIFTING OFF THE SURFACE. THE PROP FROM THE IDLING ENG STRUCK THE SOFT SNOW AND THE L WINGTIP SMARTLY HIT THE TOP OF THE SNOW DRIFT CAUSING MINOR DAMAGE TO THE L WING. REASON FOR MISHAP: INSTRUCTOR MISJUDGEMENT AND COMPLACENCY; ICY RWY; NARROW RWY; SNOW. I EXPECTED THE STUDENT TO REACT MORE QUICKLY TO THE CTRLINE DRIFT. THERE WAS NOT ENOUGH TIME TO REACT APPROPRIATELY. HOW MISHAP COULD HAVE BEEN PREVENTED: IMMEDIATE CORRECTION FOR DRIFT OFF CTRLINE (GREATER AILERON/RUDDER INPUTS). MORE IMMEDIATE APPLICATION OF BRAKES. ADD PWR: INITIATE 'BALKED' LNDG. ADD PWR: L TURNING TENDENCY TO COMBAT DRIFT TO R. FLAP RETRACTION: MORE FRICTION ON MAIN GEAR TO SLOW DOWN. DID I LEARN ANYTHING? YES! I WILL NOT BE COMPLACENT AGAIN.