<< >> NASA ASRS Report 395550, March 1998

F100 aircraft on STAR was given heading vector by controller. Reporter first officer read back the heading and shortly thereafter controller intervened telling them they were on the wrong heading. Controller gave heading 290 degrees, flight crew heard and read back 190 degrees.

Attributes
ACN	395550
Time
Date	199803
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 13000 msl bound upper : 13000
Aircraft 1
Controlling Facilities	tower : dtw
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Route In Use	arrival other arrival star : star enroute : on vectors enroute airway : zau
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
ASRS Report	395550
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

I was the PNF. We understood ATC told us to reduce to 210 KTS and turn left to 190 degrees. After readback of the clearance and completing the turn ATC told us to turn right to 320 degrees. He then said you guys are still going south, I told you to turn to right to 290 degrees. I feel there was a misunderstanding on the initial heading assignment. I heard and read back 190 degrees and the controller was expecting a 290 degree heading. We called ZAU on the phone and discussed the situation. They assured us that no separation was compromised and that they were not pulling the tapes.

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Original NASA ASRS Text

Title: F100 ACFT ON STAR WAS GIVEN HDG VECTOR BY CTLR. RPTR FO READ BACK THE HDG AND SHORTLY THEREAFTER CTLR INTERVENED TELLING THEM THEY WERE ON THE WRONG HDG. CTLR GAVE HDG 290 DEGS, FLC HEARD AND READ BACK 190 DEGS.

Narrative: I WAS THE PNF. WE UNDERSTOOD ATC TOLD US TO REDUCE TO 210 KTS AND TURN L TO 190 DEGS. AFTER READBACK OF THE CLRNC AND COMPLETING THE TURN ATC TOLD US TO TURN R TO 320 DEGS. HE THEN SAID YOU GUYS ARE STILL GOING S, I TOLD YOU TO TURN TO R TO 290 DEGS. I FEEL THERE WAS A MISUNDERSTANDING ON THE INITIAL HDG ASSIGNMENT. I HEARD AND READ BACK 190 DEGS AND THE CTLR WAS EXPECTING A 290 DEG HDG. WE CALLED ZAU ON THE PHONE AND DISCUSSED THE SIT. THEY ASSURED US THAT NO SEPARATION WAS COMPROMISED AND THAT THEY WERE NOT PULLING THE TAPES.

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.