Narrative:

The incident was a departure on runway 13R when cleared for takeoff on 31L. I was unfamiliar with the noise abatement procedures which include departure to the north with light winds. We had strong south winds when departing the previous airport and also noted strong south winds at 3000'. Our landing at dal was on runway 18. I assumed we would also depart to the south. Neither pilot wrote down the ATIS, but I noted the winds were out of the south and anticipated using 18 for departure. The student handled the radio communication including the readback, 'cleared for takeoff runway 31L, depart to the south.' I had only heard, '...depart to the south.' the student turned onto runway 31L at intersection delta. I told him we were cleared to take off to the south and told him to turn for runway 13R departure. As we began our takeoff roll the tower asked, 'state your intentions.' I assumed we had taken too long on the runway and replied, 'we're rolling.' the controller didn't respond to us, no abort was suggested, no error implied. He did, however, command another aircraft Y to go around, which I assumed was caused by us spending too much time on the runway. Neither pilot perceived the error until clear of the airspace. This was a pm flight after both pilots had worked full days. I had previously only used runway 18 and 13 at dal. I was teaching in the aircraft instead of listening to what was going on around us. My instrument told me to check my heading, which showed that I was facing the wrong way, so I did a u-turn and took off. I feel that the problem would never have happened if I had a detailed airport diagram instead of just the FAA airport facs directory.

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Original NASA ASRS Text

Title: INSTRUCTOR AND STUDENT ON NIGHT FLT MAKE WRONG DIRECTION TKOF AT DAL.

Narrative: THE INCIDENT WAS A DEP ON RWY 13R WHEN CLRED FOR TKOF ON 31L. I WAS UNFAMILIAR WITH THE NOISE ABATEMENT PROCS WHICH INCLUDE DEP TO THE N WITH LIGHT WINDS. WE HAD STRONG S WINDS WHEN DEPARTING THE PREVIOUS ARPT AND ALSO NOTED STRONG S WINDS AT 3000'. OUR LNDG AT DAL WAS ON RWY 18. I ASSUMED WE WOULD ALSO DEPART TO THE S. NEITHER PLT WROTE DOWN THE ATIS, BUT I NOTED THE WINDS WERE OUT OF THE S AND ANTICIPATED USING 18 FOR DEP. THE STUDENT HANDLED THE RADIO COM INCLUDING THE READBACK, 'CLRED FOR TKOF RWY 31L, DEPART TO THE S.' I HAD ONLY HEARD, '...DEPART TO THE S.' THE STUDENT TURNED ONTO RWY 31L AT INTXN DELTA. I TOLD HIM WE WERE CLRED TO TAKE OFF TO THE S AND TOLD HIM TO TURN FOR RWY 13R DEP. AS WE BEGAN OUR TKOF ROLL THE TWR ASKED, 'STATE YOUR INTENTIONS.' I ASSUMED WE HAD TAKEN TOO LONG ON THE RWY AND REPLIED, 'WE'RE ROLLING.' THE CTLR DIDN'T RESPOND TO US, NO ABORT WAS SUGGESTED, NO ERROR IMPLIED. HE DID, HOWEVER, COMMAND ANOTHER ACFT Y TO GO AROUND, WHICH I ASSUMED WAS CAUSED BY US SPENDING TOO MUCH TIME ON THE RWY. NEITHER PLT PERCEIVED THE ERROR UNTIL CLR OF THE AIRSPACE. THIS WAS A PM FLT AFTER BOTH PLTS HAD WORKED FULL DAYS. I HAD PREVIOUSLY ONLY USED RWY 18 AND 13 AT DAL. I WAS TEACHING IN THE ACFT INSTEAD OF LISTENING TO WHAT WAS GOING ON AROUND US. MY INSTR TOLD ME TO CHK MY HDG, WHICH SHOWED THAT I WAS FACING THE WRONG WAY, SO I DID A U-TURN AND TOOK OFF. I FEEL THAT THE PROB WOULD NEVER HAVE HAPPENED IF I HAD A DETAILED ARPT DIAGRAM INSTEAD OF JUST THE FAA ARPT FACS DIRECTORY.

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.