Heading track deviation during a non adherence to ATC clearance.

Attributes
ACN	295828
Time
Date	199502
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : grr
State Reference	MI
Altitude	msl bound lower : 1200 msl bound upper : 1200
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : grr tower : pit
Operator	common carrier : air taxi
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	climbout : initial
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : commercial
Experience	flight time last 90 days : 60 flight time total : 1300 flight time type : 180
ASRS Report	295828
Person 2
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

After takeoff we were told to contact departure. A left turn heading of 220 degrees was given, in which I understood as a 200 degree heading. I was still in my turn to 200 degrees and turning through 220 degrees when the PNF advised me that he understood the heading to be 220 degrees. I stopped my turn and rolled out on a 210 degree heading. The frequency was in use by other aircraft which delayed us from confirming our heading. The controller asked our heading and we gave him our heading of 210 degrees returning to 220 degrees for confirmation. He asked if we could take the tower phone number, and call when on the ground. No explanation was given. We were in the climb out in our second segment climb, there was congestion on the frequency, and we were concentrating on avoiding any possible wake turbulence of the 2 aircraft that had departed before us.

Original NASA ASRS Text

Title: HDG TRACK DEV DURING A NON ADHERENCE TO ATC CLRNC.

Narrative: AFTER TKOF WE WERE TOLD TO CONTACT DEP. A L TURN HDG OF 220 DEGS WAS GIVEN, IN WHICH I UNDERSTOOD AS A 200 DEG HDG. I WAS STILL IN MY TURN TO 200 DEGS AND TURNING THROUGH 220 DEGS WHEN THE PNF ADVISED ME THAT HE UNDERSTOOD THE HDG TO BE 220 DEGS. I STOPPED MY TURN AND ROLLED OUT ON A 210 DEG HDG. THE FREQ WAS IN USE BY OTHER ACFT WHICH DELAYED US FROM CONFIRMING OUR HDG. THE CTLR ASKED OUR HDG AND WE GAVE HIM OUR HDG OF 210 DEGS RETURNING TO 220 DEGS FOR CONFIRMATION. HE ASKED IF WE COULD TAKE THE TWR PHONE NUMBER, AND CALL WHEN ON THE GND. NO EXPLANATION WAS GIVEN. WE WERE IN THE CLB OUT IN OUR SECOND SEGMENT CLB, THERE WAS CONGESTION ON THE FREQ, AND WE WERE CONCENTRATING ON AVOIDING ANY POSSIBLE WAKE TURB OF THE 2 ACFT THAT HAD DEPARTED BEFORE US.

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.