PARTIAL CTL CAPABILITY WITH A JAMMED CYCLIC IN AN AS350 ROTARY WINGED ACFT CREATES THE NEED FOR A DIFFERENT APCH LNDG PROC DURING COLD WX OPS NEAR W12; WA.

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LANDED ON RIDGE SIDE OF CORNICE WITH BEAR PAWS ON SKIDS ALLOWING NOSE TO SINK IN DEEP NEW SNOW. SKIERS CHKED AVALANCHE HAZARD AND SKIED TO BOTTOM PICK-UP (ABOUT 30 MINS). AT TKOF; COULD NOT MOVE CYCLIC (ACFT ROTOR PITCH CTL) FORWARD. FELT LIKE SOLID CTL LOCK. COLLECTIVE PITCH (BLADE PITCH CTL) GAVE LIMITED CTL OF PITCH ATTITUDE OF HELI SO I HEADED FOR LOST RIVER AIRSTRIP TO ATTEMPT RUN ON LNDG. AFTER 10 MINS; THE LOCK DISAPPEARED AND I WAS ABLE TO LAND NORMALLY. MAINT CHANGED FORE AND AFT SERVO (MIXING UNITS) TO BE SURE BUT MY THEORY MAY HAVE MERIT; IE: LNDG WARM A-STAR IN DEEP SNOW WITH NOSE WAY DOWN ALLOWED SNOW TO SLIDE INTO BELLY PAN AND BEGIN TO MELT. SHUTTING DOWN ALLOWED SNOW TO REFREEZE WHERE IT INTERFERED WITH BELL CRANK; CTL LINKAGE OR WHATEVER. FLYING TOWARD AIRSTRIP ALLOWED ACFT TO WARM; MELTED ICE/SNOW WHICH DROPPED OUT OF HARMS WAY. WHILE BEAR PAWS HAVE LOTS OF FANS; THIS MAY BE AN ARGUMENT FOR FULL LENGTH SKIES. OTHERWISE; BE AWARE OF SNOW GETTING INTO BELLY PAN AND LAUNCH CAREFULLY. CHIEF PLT HANDED RPT TO NTSB.