A cessna citation flight crew misunderstood clearance and believed that dca TRACON was in error.

Attributes
ACN	438692
Time
Date	199905
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : druzz
State Reference	MD
Altitude	msl single value : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dca.tracon
Operator	general aviation : corporate
Make Model Name	Citation V
Operating Under FAR Part	Part 91
Navigation In Use	other vortac
Flight Phase	cruise : enroute altitude change
Route In Use	arrival star : jasen
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 100 flight time total : 6300 flight time type : 500
ASRS Report	438697
Person 2
Affiliation	company : charter
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	Flight Crew Human Performance Company Chart Or Publication Airport
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

XXX was en route from cmh to iad. Washington approach had advised XXX to turn right at doccs intersection to a heading of 150 degrees. The crew misunderstood the clearance at 'dukes' intersection. At druzz intersection, the controller queried crew as to why they had not turned. The crew turned to a new assigned heading of 190 degrees. (Doccs intersection was not on the arrival segment XXX was flying.) as soon as washington advised another aircraft to turn at doccs, the crew realized he had informed them incorrectly. Doccs is on the lower approach track of the jasen 2. The controller had advised XXX to turn on an intersection not on their assigned flight plan. There was no traffic conflict and XXX landed without incident.

Original NASA ASRS Text

Title: A CESSNA CITATION FLC MISUNDERSTOOD CLRNC AND BELIEVED THAT DCA TRACON WAS IN ERROR.

Narrative: XXX WAS ENRTE FROM CMH TO IAD. WASHINGTON APCH HAD ADVISED XXX TO TURN R AT DOCCS INTXN TO A HDG OF 150 DEGS. THE CREW MISUNDERSTOOD THE CLRNC AT 'DUKES' INTXN. AT DRUZZ INTXN, THE CTLR QUERIED CREW AS TO WHY THEY HAD NOT TURNED. THE CREW TURNED TO A NEW ASSIGNED HDG OF 190 DEGS. (DOCCS INTXN WAS NOT ON THE ARR SEGMENT XXX WAS FLYING.) AS SOON AS WASHINGTON ADVISED ANOTHER ACFT TO TURN AT DOCCS, THE CREW REALIZED HE HAD INFORMED THEM INCORRECTLY. DOCCS IS ON THE LOWER APCH TRACK OF THE JASEN 2. THE CTLR HAD ADVISED XXX TO TURN ON AN INTXN NOT ON THEIR ASSIGNED FLT PLAN. THERE WAS NO TFC CONFLICT AND XXX LANDED WITHOUT INCIDENT.

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.