Narrative:

Departing runway 36, I was the PF, sic of a challenger 6013A. The clearance given to me was 'depart north, noise abatement procedure' not 'northwest' as was the usual. The WX was VMC. I elected to fly the potomac river visually as was allowed by the procedure instead of intercepting the dca R328 outbound. To my best recollection, I was maintaining the river visually below me as I climbed to the assigned 5000 ft. ATC then directed a left turn to 270 degrees. The direction to turn was given in the usual manner. That is, without further controller comment, or any sense of emergency. Approximately 5 mins later we were informed by ATC that there 'may' be an incursion into restr airspace by our aircraft. ATC asked us to call them (dca TRACON) upon our arrival at teb, nj. We did no from teb at approximately XA30 EST. Subsequently, at approximately XB00 EST, a call was received by our employer from the united states secret service, advising us that they believed our aircraft to have violated P56 north of dca. The captain and I were interviewed by the secret service at teb. Special agent of headquarters plaza, morristown, nj, did what he termed a standard interview with me. I advised him that I did not at any time intentionally violate P56. I further advised him any possible incursion may have been due to a possible late left turn on my part and the high deck angle of the aircraft upon climb out. I advised him that it was my intention at all times to adhere to the departure clearance. The special agent requested that I send him a copy of this NASA report, a request that I agreed to comply with. Upon further reflection and review of the dca ATIS at the time, a strong wind from the west may have been a contributing factor in this matter.

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Original NASA ASRS Text

Title: CL600 IS ACCUSED OF FLYING THROUGH P56 AFTER TKOF DCA.

Narrative: DEPARTING RWY 36, I WAS THE PF, SIC OF A CHALLENGER 6013A. THE CLRNC GIVEN TO ME WAS 'DEPART N, NOISE ABATEMENT PROC' NOT 'NW' AS WAS THE USUAL. THE WX WAS VMC. I ELECTED TO FLY THE POTOMAC RIVER VISUALLY AS WAS ALLOWED BY THE PROC INSTEAD OF INTERCEPTING THE DCA R328 OUTBOUND. TO MY BEST RECOLLECTION, I WAS MAINTAINING THE RIVER VISUALLY BELOW ME AS I CLBED TO THE ASSIGNED 5000 FT. ATC THEN DIRECTED A L TURN TO 270 DEGS. THE DIRECTION TO TURN WAS GIVEN IN THE USUAL MANNER. THAT IS, WITHOUT FURTHER CTLR COMMENT, OR ANY SENSE OF EMER. APPROX 5 MINS LATER WE WERE INFORMED BY ATC THAT THERE 'MAY' BE AN INCURSION INTO RESTR AIRSPACE BY OUR ACFT. ATC ASKED US TO CALL THEM (DCA TRACON) UPON OUR ARR AT TEB, NJ. WE DID NO FROM TEB AT APPROX XA30 EST. SUBSEQUENTLY, AT APPROX XB00 EST, A CALL WAS RECEIVED BY OUR EMPLOYER FROM THE UNITED STATES SECRET SVC, ADVISING US THAT THEY BELIEVED OUR ACFT TO HAVE VIOLATED P56 N OF DCA. THE CAPT AND I WERE INTERVIEWED BY THE SECRET SVC AT TEB. SPECIAL AGENT OF HEADQUARTERS PLAZA, MORRISTOWN, NJ, DID WHAT HE TERMED A STANDARD INTERVIEW WITH ME. I ADVISED HIM THAT I DID NOT AT ANY TIME INTENTIONALLY VIOLATE P56. I FURTHER ADVISED HIM ANY POSSIBLE INCURSION MAY HAVE BEEN DUE TO A POSSIBLE LATE L TURN ON MY PART AND THE HIGH DECK ANGLE OF THE ACFT UPON CLBOUT. I ADVISED HIM THAT IT WAS MY INTENTION AT ALL TIMES TO ADHERE TO THE DEP CLRNC. THE SPECIAL AGENT REQUESTED THAT I SEND HIM A COPY OF THIS NASA RPT, A REQUEST THAT I AGREED TO COMPLY WITH. UPON FURTHER REFLECTION AND REVIEW OF THE DCA ATIS AT THE TIME, A STRONG WIND FROM THE W MAY HAVE BEEN A CONTRIBUTING FACTOR IN THIS MATTER.

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.