Narrative:

Per ATC instruction, I taxied to runway 18L for an intersection a departure. The clearance I recall receiving from tower, was 'nxxx, heading 155 degrees, cleared for takeoff runway 18L intersection a, air carrier traffic holding in position full length.' I departed and once reaching a safe altitude, I began my turn to 155 degrees. Before making my initial turn, I heard tower advise the air carrier traffic that I was in a left turn and they were cleared for takeoff. I had not begun my turn yet, when tower made that transmission. I began to make my turn. Tower advised me to switch to departure. When I contacted departure I said, 'nxxx, passing 1200 ft turning to 155 degrees ATC assigned.' after my initial call to departure, the controller did not advise that they wanted me on another heading other than 155 degrees. The only other instructions I received were to climb to 5000 ft and also to turn to 090 degrees. This did not occur immediately after my initial call to ATC. I believe that at least a min passed before receiving the new heading. I was later instructed to contact the charlotte ATC supervisor by seymour johnson approach (gsb). Gsb actually contacted me on my destination unicom frequency after I had cancelled IFR. The clt supervisor advised that the heading that was issued to me was actually 115 degrees, not 155 degrees. ATC lost IFR separation with my aircraft and the air carrier traffic that departed behind me. I do not recall receiving an instruction for 115 degrees. I feel this could have been avoided by not clearing me for takeoff in front of a twin turbine aircraft which obviously has a higher speed and climb rate than a PA32 cherokee six. Since this did not happen, ATC had a chance to correct my heading when I checked in with departure and advised that I was turning to 155 degrees, ATC assigned. The conditions at the time were VMC and the air carrier traffic may have been able to maintain visual separation and I assume they had information from their TCASII.

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Original NASA ASRS Text

Title: CLT SUPVR REVIEWS PLTDEV WITH PA32 PLT AFTER LNDG AT DEST FOR NOT COMPLYING WITH HDG ASSIGNMENT ON DEP, CAUSING A LOSS OF SEPARATION WITH A DHC8. PLT DISPUTES INCIDENT DUE TO READBACK TO LCL AND DEP CTLR.

Narrative: PER ATC INSTRUCTION, I TAXIED TO RWY 18L FOR AN INTXN A DEP. THE CLRNC I RECALL RECEIVING FROM TWR, WAS 'NXXX, HDG 155 DEGS, CLRED FOR TKOF RWY 18L INTXN A, ACR TFC HOLDING IN POS FULL LENGTH.' I DEPARTED AND ONCE REACHING A SAFE ALT, I BEGAN MY TURN TO 155 DEGS. BEFORE MAKING MY INITIAL TURN, I HEARD TWR ADVISE THE ACR TFC THAT I WAS IN A L TURN AND THEY WERE CLRED FOR TKOF. I HAD NOT BEGUN MY TURN YET, WHEN TWR MADE THAT XMISSION. I BEGAN TO MAKE MY TURN. TWR ADVISED ME TO SWITCH TO DEP. WHEN I CONTACTED DEP I SAID, 'NXXX, PASSING 1200 FT TURNING TO 155 DEGS ATC ASSIGNED.' AFTER MY INITIAL CALL TO DEP, THE CTLR DID NOT ADVISE THAT THEY WANTED ME ON ANOTHER HDG OTHER THAN 155 DEGS. THE ONLY OTHER INSTRUCTIONS I RECEIVED WERE TO CLB TO 5000 FT AND ALSO TO TURN TO 090 DEGS. THIS DID NOT OCCUR IMMEDIATELY AFTER MY INITIAL CALL TO ATC. I BELIEVE THAT AT LEAST A MIN PASSED BEFORE RECEIVING THE NEW HDG. I WAS LATER INSTRUCTED TO CONTACT THE CHARLOTTE ATC SUPVR BY SEYMOUR JOHNSON APCH (GSB). GSB ACTUALLY CONTACTED ME ON MY DEST UNICOM FREQ AFTER I HAD CANCELLED IFR. THE CLT SUPVR ADVISED THAT THE HDG THAT WAS ISSUED TO ME WAS ACTUALLY 115 DEGS, NOT 155 DEGS. ATC LOST IFR SEPARATION WITH MY ACFT AND THE ACR TFC THAT DEPARTED BEHIND ME. I DO NOT RECALL RECEIVING AN INSTRUCTION FOR 115 DEGS. I FEEL THIS COULD HAVE BEEN AVOIDED BY NOT CLRING ME FOR TKOF IN FRONT OF A TWIN TURBINE ACFT WHICH OBVIOUSLY HAS A HIGHER SPD AND CLB RATE THAN A PA32 CHEROKEE SIX. SINCE THIS DID NOT HAPPEN, ATC HAD A CHANCE TO CORRECT MY HDG WHEN I CHKED IN WITH DEP AND ADVISED THAT I WAS TURNING TO 155 DEGS, ATC ASSIGNED. THE CONDITIONS AT THE TIME WERE VMC AND THE ACR TFC MAY HAVE BEEN ABLE TO MAINTAIN VISUAL SEPARATION AND I ASSUME THEY HAD INFO FROM THEIR TCASII.

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.