What was found
FOUND BAFFLE LIBERATED FROM ENGINE MUFFLER BLOCKING EXHAUST GAS PATH CAUSING ENGINE POWER LOSS. RECORDS INDICATE INSTALLED MUFFLER ASSEMBLY WAS PN 99482-00 WHICH IS EXEMPT FROM AD 70-16-05 "EXHAUST MUFFLER CRACKS". INQUIRES TO REPAIR STATIONS THAT SERVICE/SELL MUFFLERS WERE MADE INQUIRING WHAT MAKES PN 99482-00 "IMPROVED MUFFLERS" EXEMPT FROM THE AD. NO REPAIR STATION ANSWERED OUR INQUIRY. A NEW MUFFLER PN A99482-00 AND TAIL PIPE PN A63666-002 WERE ORDERED AND RECEIVED. COULD NOT DETERMINE A MODIFICATION TO MUFFLER ASSEMBLY PN A99482-00 THAT PREVENTS A BAFFLE FAILURE FROM BLOCKING THE EXHAUST GAS PATH. BUT TAILPIPE A63666-002 DOES HAVE A MODIFICATION WHERE A "CAGE" MADE OUT OF ROUNDED STEEL RODS WELDED TO THE TIP THAT INSERTS INTO THE MUFFLER ASSEMBLY. IT APPEARS THESE "ROUNDED RODS", ON THE TAILPIPE WOULD PREVENT A LIBERATED BAFFLE FROM BLOCKING THE EXHAUST GAS PATH. THE TAIL PIPE ASSEMBLY IS A SEPARATE PART FROM THE MUFFLER AND MAY NOT NECESSARILY BE REPLACED WITH THE MUFFLER. IF THIS IS TRUE, TAIL PIPE PN 63666-002 SHOULD BE REFERENCED IN AD 70-16-05 AS A PART REQUIRING REPLACEMENT TO DISCONTINUE THE RECURRING INSPECTION REQUIRED BY THE AD.