Narrative:

Departing runway 01 at dca, complied with noise abatement climb procedure. Tower instructed us to turn left immediately, no heading reference given, and check transponder on. I turned left as instructed and captain recycled transponder. Contacted department and copied a phone number. On arrival at destination, were met by FAA, secret service and chief pilot. They informed us we were close to prohibited airspace P56.

Google
 

Original NASA ASRS Text

Title: B737-300 FLC UNKNOWINGLY ENTERED PROHIBITED AIRSPACE P56 DURING INITIAL CLIMB FROM RWY 01 AT DCA.

Narrative: DEPARTING RWY 01 AT DCA, COMPLIED WITH NOISE ABATEMENT CLIMB PROCEDURE. TWR INSTRUCTED US TO TURN L IMMEDIATELY, NO HEADING REFERENCE GIVEN, AND CHK TRANSPONDER ON. I TURNED L AS INSTRUCTED AND CAPT RECYCLED TRANSPONDER. CONTACTED DEPT AND COPIED A PHONE NUMBER. ON ARRIVAL AT DEST, WERE MET BY FAA, SECRET SERVICE AND CHIEF PLT. THEY INFORMED US WE WERE CLOSE TO PROHIBITED AIRSPACE P56.

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.