SMA HAS ALTERNATOR BELT FAILURE.

Narrative

ENRTE FROM ZID TO FFM AT 6000 FT IFR THE ALTERNATOR WENT DEAD NEAR THE AXN VOR. I TURNED OFF ELECTRICAL COMPONENTS EXCEPT 1 COM AND 1 NAV RADIO. DEST WAS AWOS MARGINAL 200 FT OVCST 1 MI IN FOG. ALTERNATE ARPT (FAR) WAS VFR. SUDDENLY; THE ENG DEVELOPED A VIBRATION WHICH I THOUGHT MIGHT BE THE PROP STRIKING THE ALTERNATOR PULLEY. THEN BOTH RADIOS WENT DEAD. I TURNED THE ACFT 180 DEGS TO FLY TO AXN AND CONTACTED ZMP ON MY HAND-HELD PORTABLE RADIO; DECLARED AN EMER AND TOLD THEM I WAS DSNDING BTWN LAYERS. MY PORTABLE GPS RECEIVER WAS USING ACFT PWR SO IT QUIT WHEN THE BATTERY WENT DEAD. I INSTALLED THE GPS BATTERY PACK BUT THE BATTERIES WERE DEAD. I REPLACED THE BATTERIES WITH SPARES FROM MY FLT CASE AND TUNED THE GPS TO AXN. I WAS NOW 6 MI E OF AXN SO I TURNED 180 DEGS AND TOLD CTR I WAS GOING TO ADVISORY FREQ. THEY SAID CALL WHEN ON THE GND. WX AT AXN WAS E 200 FT BROKEN 120 FT BROKEN 3 MI FOG. I WAS ABLE TO STAY VFR UNDER THE CLOUDS AND LANDED ON RWY 31. THE VIBRATION WAS CAUSED BY THE BROKEN ALTERNATOR BELT STRIKING THE PROP BLADES; LIKE A PLAYING CARD ON A BICYCLE SPOKE WHEEL. ADVISORY CALLED PRINCETON FSS AND CLOSED OUR IFR PLAN. BECAUSE THE PROP DRIVES THE AIRCONDITIONER COMPRESSOR AND THE ALTERNATOR; THE ALTERNATOR BELT HAS TO BE VERY SMALL; ONLY ABOUT 3/8 INCH WIDE. WE HAVE TO CARRY A SPARE BELT IN THE PLANE BECAUSE MOST SHOPS DO NOT STOCK THEM. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THE ACFT IS A PA32 SARATOGA. IT WAS FACTORY BUILT WITH AIRCONDITIONER AND THERE IS VERY LITTLE SPACE BEHIND THE PROP; THUS THE NARROW BELT NOT STOCKED BY MANY FBO'S. HAVING HAD BREAKS PREVIOUSLY HE ALWAYS CARRIES A SPARE IN THE BAGGAGE COMPARTMENT. HE ALSO MENTIONED THAT HE HAD ALWAYS HEARD THERE IS SO MUCH PAPER WORK IF ONE DECLARES AN EMER. HE HAS NOT HAD TO FILL OUT ONE SINGLE PIECE OF PAPER; HE IS PLEASE TO SAY.