PA28 STUDENT PLT; ON HIS FIRST SOLO CROSS COUNTRY FLT; WAS UNABLE TO GET A DISCRETE XPONDER CODE FROM WRI MILITARY CTLR. PLT WAS REPEATEDLY TOLD TO STANDBY. PLT WAS THEN TOLD TO CONTACT N90 SUPVR; AND WAS THEN GIVEN THE XPONDER CODE.

Narrative

ON TUESDAY; I TOOK MY FIRST CROSS-COUNTRY SOLO. IN PREPARATION FOR THE FLT; I OBTAINED ALL PERTINENT INFO. MY FLT WAS PLANNED TO DEPART BLM AND LAND AT ABE. THE RETURN FLT RTE WAS ABE TO TTN; AND TTN BACK TO BLM. ALL DEP AND DEST ARPT FREQUENCIES WERE RECORDED. I MADE NOTES FOR REMINDERS INCLUDING A LARGE NOTE ACROSS THE TOP OF THE NAV LOG REMINDING ME TO CONTACT MCGUIRE PRIOR TO DEP TO OBTAIN XPONDER CODE 'ON GND.' I WAS FAMILIAR WITH THIS PROC DUE TO THE FACT THAT BLM IS IN THE ADIZ. I WAS AGAIN REMINDED WHEN I CALLED MILLVILLE FLT SERVICE TO FILE ADIZ FLT PLAN AND OBTAIN A STANDARD WX BRIEFING IN WHICH I DID DURING THE EARLY STAGES OF MY FLT PLANNING. I MET WITH MY INSTRUCTOR TO GO OVER THE FLT PLAN IN DETAIL. WE WENT OVER THE RADIO PROCS AND SPECIFICALLY CONTACTING MCGUIRE PRIOR TO TAKE OFF. I CALLED MILLVILLE FSS TO AMEND THE PREVIOUS FLT PLAN DUE TO THE FACT I WAS DEPARTING LATER THAN ANTICIPATED. HE SUGGESTED THAT WE CANCEL THE ORIGINAL ADIZ FLT PLAN AND START OVER. I AGREED AND FILED MY FLT PLAN WITH HIM. I USED THE SAME RTES AND DISCUSSED THE RETURN FLT AND FILED AN ADIZ FLT PLAN DUE TO THE FACT THAT I WAS RETURNING TO AN ARPT THAT WAS WITHIN THE ADIZ. WE ALSO TALKED ABOUT WHEN TO PICK UP THE XPONDER CODE ON THE RETURN FLT. I WAS ADVISED THAT I WOULD OBTAIN XPONDER CODE WHILE IN FLT. HOWEVER; I WAS GIVEN THAT XPONDER CODE FROM CLRNC DEL AT TRENTON MERCER ARPT. I FELT VERY COMFORTABLE WITH THE FLT PLAN. I PERFORMED THE PREFLT INSPECTION AND RUN-UP. I MADE MY COMMON TFC CALLS AND TAXI ON RWY 21 FOR DEP. AS I WAS LIFTING OFF THE RWY; I REALIZED THAT I DID NOT OBTAIN THE XPONDER CODE. I THOUGHT FOR A MOMENT TO PUT THE AIRPLANE BACK ON THE RWY AND ABORT THE TKOF. HOWEVER; BETTER JUDGEMENT WAS TO CONTINUE TO NAVIGATE AND MAKE RADIO CONTACT IMMEDIATELY WITH MCGUIRE. I CONTINUED WITH THE FLT. ONCE I MADE MY ANNOUNCEMENT THAT I WAS DEPARTING THE PATTERN; I CALLED MCGUIRE APCH. MCGUIRE RESPONDED AND TOLD ME TO STANDBY. I COMPLIED UNTIL SOME TIME HAD PAST AND CALLED AGAIN. I ADVISED MCGUIRE OF THE SIT AND WHERE I WAS. AGAIN I WAS TOLD TO STAND-BY. AFTER ABOUT FIVE MINS; MCGUIRE ASKED IF I HAD TIME TO TAKE A PHONE NUMBER DOWN. I WAS TOLD TO CALL THE NUMBER WHEN I LANDED. HE THEN GAVE ME A XPONDER CODE. THE PROB WAS CAUSED BY MY FAILURE TO OBTAIN A XPONDER CODE BEFORE DEP IN AN ADIZ. IN THE FUTURE I WILL BE SURE TO INCLUDE THIS PROC IN A CHKLIST THAT WILL BE PERFORMED PRIOR TO TAKE OFF.