Flight crew of BE40 on arrival to jyo within the dcadiz improperly squawk 1200 when IFR is canceled....

Attributes
ACN	632483
Time
Date	200409
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : jyo.airport
State Reference	VA
Altitude	msl single value : 2000
Aircraft 1
Controlling Facilities	tracon : pct.tracon
Make Model Name	Beechjet 400
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 110 flight time total : 3900 flight time type : 125
ASRS Report	632483
Person 2
Function	flight crew : first officer
Events
Anomaly	airspace violation : entry non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While on an IFR flight plan and in contact with potomac approach, I was flying direct to jyo (leesburg, va) to expect a visual approach. Due to haze, we did not sight the airport until 3 mi southwest. I instructed my copilot to call the field in sight and began to join the downwind for runway 35. Potomac replied to cancel the IFR with him or on the ground with leesburg radio. Without asking my preference, my copilot canceled the IFR with potomac and switched to CTAF. We had an uneventful approach and landing. Upon entering the FBO, I had a message to contact potomac TRACON. The gentleman asked me why we squawked 1200 and did not remain on our assigned code. I then asked my copilot if he changed it to 1200. He said that he did if after he was told to switch to CTAF. I then asked him if he was told to switch to 1200, which he replied no. He just did it out of habit. The gentleman from TRACON took my personal information and suggested that we get a briefing on the ADIZ procedures from FSS. My copilot and I then walked into the leesburg AFSS and met with the dca AFSS operations supervisor who gave us a very thorough briefing on the ADIZ procedures and that a discrete code must be squawked at all times and that the 1200 code does not exist in the ADIZ.

Original NASA ASRS Text

Title: FLT CREW OF BE40 ON ARR TO JYO WITHIN THE DCADIZ IMPROPERLY SQUAWK 1200 WHEN IFR IS CANCELED. RECEIVE APPROPRIATE BRIEFING FROM FSS SUPVR AFTER LEARNING OF THEIR ERROR.

Narrative: WHILE ON AN IFR FLT PLAN AND IN CONTACT WITH POTOMAC APCH, I WAS FLYING DIRECT TO JYO (LEESBURG, VA) TO EXPECT A VISUAL APCH. DUE TO HAZE, WE DID NOT SIGHT THE ARPT UNTIL 3 MI SW. I INSTRUCTED MY COPLT TO CALL THE FIELD IN SIGHT AND BEGAN TO JOIN THE DOWNWIND FOR RWY 35. POTOMAC REPLIED TO CANCEL THE IFR WITH HIM OR ON THE GND WITH LEESBURG RADIO. WITHOUT ASKING MY PREFERENCE, MY COPLT CANCELED THE IFR WITH POTOMAC AND SWITCHED TO CTAF. WE HAD AN UNEVENTFUL APCH AND LNDG. UPON ENTERING THE FBO, I HAD A MESSAGE TO CONTACT POTOMAC TRACON. THE GENTLEMAN ASKED ME WHY WE SQUAWKED 1200 AND DID NOT REMAIN ON OUR ASSIGNED CODE. I THEN ASKED MY COPLT IF HE CHANGED IT TO 1200. HE SAID THAT HE DID IF AFTER HE WAS TOLD TO SWITCH TO CTAF. I THEN ASKED HIM IF HE WAS TOLD TO SWITCH TO 1200, WHICH HE REPLIED NO. HE JUST DID IT OUT OF HABIT. THE GENTLEMAN FROM TRACON TOOK MY PERSONAL INFO AND SUGGESTED THAT WE GET A BRIEFING ON THE ADIZ PROCS FROM FSS. MY COPLT AND I THEN WALKED INTO THE LEESBURG AFSS AND MET WITH THE DCA AFSS OPS SUPVR WHO GAVE US A VERY THOROUGH BRIEFING ON THE ADIZ PROCS AND THAT A DISCRETE CODE MUST BE SQUAWKED AT ALL TIMES AND THAT THE 1200 CODE DOES NOT EXIST IN THE ADIZ.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Flight crew of BE40 on arrival to jyo within the dcadiz improperly squawk 1200 when IFR is canceled. Receive appropriate briefing from FSS supervisor after learning of their error.