Narrative:

Tyler tower cleared us to 'taxi into position and hold.' I read back the clearance, and the captain called for 'takeoff checklist all the way.' our procedure is to call 'takeoff checklist to the line' for a position and hold clearance, and to call for 'below the line' after takeoff clearance has been received. I completed the takeoff checklist, the captain lined the aircraft up on the runway, and stated 'you have the brakes.' not being fully conscious of the situation, I asked the captain 'did he say fly runway heading, or left turn on course?' the captain replied 'let's just go, we'll find out.' I then commenced the takeoff roll. After climb power set at 400 ft AGL, the captain called tower and asked, 'was that runway heading, or left turn on course?' the tower replied, 'well, actually, sir, that was 'position and hold.' the feeling in my gut confirmed that the controller was right. What may have contributed? The night before was a reduced rest overnight, and we were both tired and not fully situationally aware, non compliance with established company procedures, and the captain's obvious desire to get home in a hurry, to get the day over with. I call this 'last leg home syndrome.'

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Original NASA ASRS Text

Title: AN E110 FAILED TO COMPLY WITH A 'POS AND HOLD CLRNC.' FLT DEPARTED. CLRNC TKOF NOT RECEIVED.

Narrative: TYLER TWR CLRED US TO 'TAXI INTO POS AND HOLD.' I READ BACK THE CLRNC, AND THE CAPT CALLED FOR 'TKOF CHKLIST ALL THE WAY.' OUR PROC IS TO CALL 'TKOF CHKLIST TO THE LINE' FOR A POS AND HOLD CLRNC, AND TO CALL FOR 'BELOW THE LINE' AFTER TKOF CLRNC HAS BEEN RECEIVED. I COMPLETED THE TKOF CHKLIST, THE CAPT LINED THE ACFT UP ON THE RWY, AND STATED 'YOU HAVE THE BRAKES.' NOT BEING FULLY CONSCIOUS OF THE SIT, I ASKED THE CAPT 'DID HE SAY FLY RWY HDG, OR L TURN ON COURSE?' THE CAPT REPLIED 'LET'S JUST GO, WE'LL FIND OUT.' I THEN COMMENCED THE TKOF ROLL. AFTER CLB PWR SET AT 400 FT AGL, THE CAPT CALLED TWR AND ASKED, 'WAS THAT RWY HDG, OR L TURN ON COURSE?' THE TWR REPLIED, 'WELL, ACTUALLY, SIR, THAT WAS 'POS AND HOLD.' THE FEELING IN MY GUT CONFIRMED THAT THE CTLR WAS RIGHT. WHAT MAY HAVE CONTRIBUTED? THE NIGHT BEFORE WAS A REDUCED REST OVERNIGHT, AND WE WERE BOTH TIRED AND NOT FULLY SITUATIONALLY AWARE, NON COMPLIANCE WITH ESTABLISHED COMPANY PROCS, AND THE CAPT'S OBVIOUS DESIRE TO GET HOME IN A HURRY, TO GET THE DAY OVER WITH. I CALL THIS 'LAST LEG HOME SYNDROME.'

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.