DC9-30 flight crew assigned confusing heading arrival iad.

Attributes
ACN	442540
Time
Date	199907
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : aml.vor
State Reference	VA
Altitude	msl single value : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iad.tracon tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Route In Use	arrival star : jasen two
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine pilot : private
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 5000
ASRS Report	442540
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : returned to intended or assigned course
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Inbound to iad on the JASEN2 arrival approach was giving TA's. We acknowledged VFR traffic and then was given a 190 degree heading. Captain was flying. First officer read back 'turn right 190 degrees.' I turned to 190 degrees. ATC called back after we were established on the heading for approximately 30 seconds, asked our heading. We told him 190 degrees. He told us to turn to a 90 degree heading. ATC controller said that the heading was for the gilby intersection. Both the first officer and I heard 'turn right to 190 degrees.' turn right to 190 degrees at gilby is on the STAR. There would be no reason for ATC to give that instruction.

Original NASA ASRS Text

Title: DC9-30 FLC ASSIGNED CONFUSING HEADING ARR IAD.

Narrative: INBOUND TO IAD ON THE JASEN2 ARR APCH WAS GIVING TA'S. WE ACKNOWLEDGED VFR TFC AND THEN WAS GIVEN A 190 DEG HDG. CAPT WAS FLYING. FO READ BACK 'TURN R 190 DEGS.' I TURNED TO 190 DEGS. ATC CALLED BACK AFTER WE WERE ESTABLISHED ON THE HEADING FOR APPROX 30 SECONDS, ASKED OUR HEADING. WE TOLD HIM 190 DEGS. HE TOLD US TO TURN TO A 90 DEG HDG. ATC CTLR SAID THAT THE HEADING WAS FOR THE GILBY INTXN. BOTH THE FO AND I HEARD 'TURN R TO 190 DEGS.' TURN R TO 190 DEGS AT GILBY IS ON THE STAR. THERE WOULD BE NO REASON FOR ATC TO GIVE THAT INSTRUCTION.

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.