A C172 PLT DID NOT FOLLOW THE CORRECT PROCS EXITING THE DCA ADIZ.

Narrative

THIS UNAUTH ENTRY INTO THE ADIZ OCCURRED AS I WAS TAKING OFF FROM JYO FOLLOWING MY PREVIOUS UNAUTH ENTRY INTO THE ADIZ EARLIER THAT MORNING; HAVING BEEN ESCORTED TO JYO BY A HOMELAND DEFENSE CHOPPER. SINCE I HAD HAD PROBS WITH MY VOR; WHICH LED TO THE EARLIER INCURSION; I WENT UP WITH A LCL INSTRUCTOR WHO VERIFIED THAT THE VOR WAS NOT WORKING. SHE ALSO BRIEFED ME ON DEP PROCS; ADVISING THAT I WOULD NEED BOTH A FREQ AND XPONDER CODE PRIOR TO DEP. WHEN IT WAS TIME FOR ME TO DEPART JYO; I WENT TO THE JYO FSS; GOT A WX BRIEFING AND NOTAMS; AND FILED A FLT PLAN. THE BRIEFER SAID I WOULD HAVE TO CALL POTOMAC BY PHONE RATHER THAN RADIO TO GET THE NEEDED FREQ AND XPONDER CODE. SO I CALLED POTOMAC TRACON BY PHONE TO GET MY RADIO FREQ AND XPONDER CODE. ON THE GND I SET THE XPONDER INCORRECTLY TO 'XXXX.' WHEREAS IT SHOULD HAVE BEEN 'XXXY.' I WAS SUPPOSED TO SET THE RADIO FREQ TO 112.05; BUT IT ENDED UP AS 122.05; WHICH ESCAPED MY NOTICE. I WAS ALSO SUPPOSED TO MAKE CONTACT WITH POTOMAC BEFORE TAKING OFF; WHICH I WAS UNAWARE OF SINCE THE INSTRUCTOR AND I HAD NOT DONE SO AS WE HAD SIMPLY REMAINED IN THE LEESBURG PATTERN TO TEST THE VOR. MY UNDERSTANDING WAS THAT I NEEDED TO RADIO POTOMAC WHEN I WAS AIRBORNE. SO I TOOK OFF FROM JYO ON RWY 17 AND LEFT THE PATTERN ON A HDG OF 025 DEGS TO FDK. WHILE STILL CLBING; I IMMEDIATELY ATTEMPTED TO CONTACT POTOMAC ON 122.05; BUT GOT NO ANSWER. I CHKED THE FREQS I HAD WRITTEN DOWN; AND NOTICED THAT BOTH THE XPONDER AND RADIO WERE INCORRECT. I QUICKLY CORRECTED THE XPONDER TO 'XXXY' AND TRIED TO DIAL IN 112.05; BUT THE RADIO WOULD NOT GO TO '112;' IT WOULD ONLY GIVE '122.' STILL CLBING; I THEN TRIED TO CONTACT LEESBURG ON 122.6; WHICH WAS THE FREQ I WAS GIVEN TO CONTACT THEM TO OPEN MY FLT PLAN AFTER LEAVING THE ADIZ. STILL NO ANSWER. CONCERNED THAT MY RADIO WAS NOT FUNCTIONING; I TUNED TO 121.5 AND TRIED XMITTING 'PAN-PAN; CESSNA X HAS RADIO PROBS.' A LCL PLT OFFERED ASSISTANCE; BUT THEN JYO CAME ON AND ASSURED MY RADIO WAS WORKING. IT WAS AT THIS TIME THAT I NOTICED I WAS TOO HIGH; AND HAD POSSIBLY INTRUDED INTO IAD CLASS B AIRSPACE; AND STARTED TO DSND; BUT NOTICED THAT I HAD ALREADY LEFT THE ADIZ AND IAD AIRSPACE. AT THAT POINT I OPENED MY FLT PLAN WITH LEESBURG. AFTER REACHING FDK AND TURNING ENE; I CONTACTED BWI FOR FLT FOLLOWING. BWI ADVISED THAT I CONTACT POTOMAC ADIZ; WHICH I DID AND ENTERED MY XPONDER CODE. THE REST OF THE FLT WAS UNEVENTFUL. I DID NOT MAKE MYSELF AWARE OF THE PROPER PROC FOR DEPARTING INTO THE ADIZ; OTHERWISE I WOULD HAVE CORRECTED THE RADIO; AND PROBABLY THE MIS-SET XPONDER CODE AFTER TALKING TO POTOMAC. THAT BEING SAID; ONCE AIRBORNE; I ALLOWED MYSELF TO GET DISTR BY BEING UNABLE TO SET THE RADIO TO THE CORRECT FREQ TO CONTACT POTOMAC SO THAT I DID NOT ARREST MY CLB TO AVOID OVERLYING IAD CTLED AIRSPACE. TO PREVENT A FUTURE RECURRENCE; I WILL THOROUGHLY REVIEW ADIZ DEP PROCS; DOUBLECHK RADIO AND XPONDER SETTINGS; AND BE MORE VIGILANT ON MAINTAINING THE PROPER ALT WHEN DEPARTING AN ARPT NEAR CTLED AIRSPACE.