INST RATED PVT PLT FAILED TO HOLD WHERE DESIGNATED BY ATC AND CONTINUED ON TOWARD HIS DEST EVEN THOUGH ATC HAD INSTRUCTED ALL ACFT TO STAND BY DUE TO A LOST ACFT.

Narrative

I DEPARTED TBR IN GEORGIA; WAS CLRED AS FILED BY SAVANNAH APCH; V157 TO LAL; DIRECT BOW; FL. AT THE ONSET THE XPONDER BECAME INOP. I MAINTAINED ALT AND AIRWAY. I WAS FREQUENTLY REQUESTED TO RPT ALT AND LOCATION. JAX APCH ADVISED ME I WAS CLRED TO WEBBS INTXN AND CONTACT TPA 119.9; MAINTAIN 5000 FT. I CONTACTED TPA APCH; CHKING IN AT 5000 FT AT WEBBS INTXN. TPA ADVISED ROGER; GIVING NO FURTHER INSTRUCTIONS. ALMOST IMMEDIATELY AFTER RPTING TO TPA; ALL TFC ON THE FREQ WAS TOLD TO STAND BY FOR 10 MINS DUE TO A LOST ACFT. I CONTINUED SBOUND. NOT BEING TOLD TO HOLD AT WEBBS OR EXPECT FURTHER CLRNC; I THOUGHT I WAS RPTING IN DUE TO THE XPONDER PROB. I LATER WAS TOLD TO CONTACT TPA BY PHONE; WHICH I DID. I THEN LEARNED I HAD EXCEEDED MY CLRNC AT WEBBS INTXN. I ADVISED TPA THAT I MISUNDERSTOOD MY LIMIT WAS AT WEBBS. IN THE FUTURE I WILL BE MORE CAREFUL AND REQUEST SPECIFIC INSTRUCTIONS IF CONFUSION EXISTS. I AM THANKFUL TO TPA CALLING THIS MISTAKE TO MY ATTN. I WILL NOT ALLOW THIS TO OCCUR AGAIN.