Narrative:

While in position and holding on runway 22L we received the following clearance: 'turn left heading 140, cleared for takeoff runway 22L. Will call your turn in the air.' I queried the captain about the turn and he agreed that ATC would initiate our turn. As we passed 1000' AGL the tower said, 'further left heading 110 degrees, tighten your turn.' we believe the controller either made a mistake on the clearance or we did not understand correctly. He may have said, 'left heading 140, cleared for takeoff runway 22L. Will call further turn in the air.' a commuter was departing 14R, but sep was ok--approximately 1/2 mi. Also contributing to the problem was frequency congestion and fatigue. It was our fifth leg of the day. A third man in the cockpit may have helped the situation. We had been dealing with WX and icing all but 1 leg of the 5. That is very fatiguing. What may look like a full day's flying on paper becomes dangerously long when you add congestion, WX, icing, 2 crew, storms, etc, etc! Supplemental information from acn 141722: I had 4 hours sleep night before and was very tired. Couple this with fast pace communications, people blocking xmissions, just getting over old cold. System and body overload.

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Original NASA ASRS Text

Title: A HEADING TRACK DEVIATION SETS UP A POTENTIAL CONFLICT ON A MULTIPLE RWY OPERATION FOR 2 DEP ACFT.

Narrative: WHILE IN POS AND HOLDING ON RWY 22L WE RECEIVED THE FOLLOWING CLRNC: 'TURN LEFT HDG 140, CLRED FOR TKOF RWY 22L. WILL CALL YOUR TURN IN THE AIR.' I QUERIED THE CAPT ABOUT THE TURN AND HE AGREED THAT ATC WOULD INITIATE OUR TURN. AS WE PASSED 1000' AGL THE TWR SAID, 'FURTHER LEFT HDG 110 DEGS, TIGHTEN YOUR TURN.' WE BELIEVE THE CTLR EITHER MADE A MISTAKE ON THE CLRNC OR WE DID NOT UNDERSTAND CORRECTLY. HE MAY HAVE SAID, 'LEFT HDG 140, CLRED FOR TKOF RWY 22L. WILL CALL FURTHER TURN IN THE AIR.' A COMMUTER WAS DEPARTING 14R, BUT SEP WAS OK--APPROX 1/2 MI. ALSO CONTRIBUTING TO THE PROB WAS FREQ CONGESTION AND FATIGUE. IT WAS OUR FIFTH LEG OF THE DAY. A THIRD MAN IN THE COCKPIT MAY HAVE HELPED THE SITUATION. WE HAD BEEN DEALING WITH WX AND ICING ALL BUT 1 LEG OF THE 5. THAT IS VERY FATIGUING. WHAT MAY LOOK LIKE A FULL DAY'S FLYING ON PAPER BECOMES DANGEROUSLY LONG WHEN YOU ADD CONGESTION, WX, ICING, 2 CREW, STORMS, ETC, ETC! SUPPLEMENTAL INFO FROM ACN 141722: I HAD 4 HRS SLEEP NIGHT BEFORE AND WAS VERY TIRED. COUPLE THIS WITH FAST PACE COMS, PEOPLE BLOCKING XMISSIONS, JUST GETTING OVER OLD COLD. SYS AND BODY OVERLOAD.

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.