FK100 crew encroached on prohibited area P56-B departing dca.

Attributes
ACN	432877
Time
Date	199904
Day	Thu
Local Time Of Day	1201 To 1800
Place
State Reference	DC
Altitude	msl single value : 4000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dca.tracon
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial climbout : intermediate altitude
Route In Use	departure : noise abatement departure : other published ifr departure
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 225 flight time total : 15000 flight time type : 4000
ASRS Report	432877
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	aircraft equipment problem : less severe airspace violation : entry non adherence : far non adherence : published procedure
Independent Detector	atc equipment other atc equipment : radar other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Aircraft Airspace Structure Weather Navigational Facility Flight Crew Human Performance
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Flight departed dca on standard noise abatement procedure 328 degrees dca. The FMS had programmed dca -- dca/328 degrees 20 DME for a course line for the prescribed procedure. Aircraft departed runway 36. At 400 ft, navigation selected and a turn was initiated. At 600 ft autoplt selected and course captured by 1000 ft AGL with 0.0 deviation displayed. This course was followed for approximately 12-15 mi followed by a turn (by ATC) to a 090 degree heading. Crew was advised to call dca radar when on the ground. We were advised that we had encroached on P56-B airspace. With no visual reference to the ground, only our instruments were available for course guidance and all indications, as previously stated, were that our aircraft was on course. Our heading was consistent with a heading necessary to track the 328 degree course as well as raw data indications. The 328 degree radial dca, when followed, does position an aircraft very near P56-B. Without visual reference to follow the potomac river, the radial must be used. With all cockpit indications normal and 0.0 error for tracking displayed, I cannot understand how an encroachment could have occurred.

Original NASA ASRS Text

Title: FK100 CREW ENCROACHED ON PROHIBITED AREA P56-B DEPARTING DCA.

Narrative: FLT DEPARTED DCA ON STANDARD NOISE ABATEMENT PROC 328 DEGS DCA. THE FMS HAD PROGRAMMED DCA -- DCA/328 DEGS 20 DME FOR A COURSE LINE FOR THE PRESCRIBED PROC. ACFT DEPARTED RWY 36. AT 400 FT, NAV SELECTED AND A TURN WAS INITIATED. AT 600 FT AUTOPLT SELECTED AND COURSE CAPTURED BY 1000 FT AGL WITH 0.0 DEV DISPLAYED. THIS COURSE WAS FOLLOWED FOR APPROX 12-15 MI FOLLOWED BY A TURN (BY ATC) TO A 090 DEG HDG. CREW WAS ADVISED TO CALL DCA RADAR WHEN ON THE GND. WE WERE ADVISED THAT WE HAD ENCROACHED ON P56-B AIRSPACE. WITH NO VISUAL REF TO THE GND, ONLY OUR INSTS WERE AVAILABLE FOR COURSE GUIDANCE AND ALL INDICATIONS, AS PREVIOUSLY STATED, WERE THAT OUR ACFT WAS ON COURSE. OUR HDG WAS CONSISTENT WITH A HDG NECESSARY TO TRACK THE 328 DEG COURSE AS WELL AS RAW DATA INDICATIONS. THE 328 DEG RADIAL DCA, WHEN FOLLOWED, DOES POS AN ACFT VERY NEAR P56-B. WITHOUT VISUAL REF TO FOLLOW THE POTOMAC RIVER, THE RADIAL MUST BE USED. WITH ALL COCKPIT INDICATIONS NORMAL AND 0.0 ERROR FOR TRACKING DISPLAYED, I CANNOT UNDERSTAND HOW AN ENCROACHMENT COULD HAVE OCCURRED.

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.