Narrative:

Taking off runway 23L in ind the tower controller cleared a DC9 to takeoff runway 23R immediately after. Tower controller told us of the DC9 coming off runway 23R and asked us if we could maintain visual separation. The first officer was flying and I was performing the non flying function which included traffic watch. I told tower that I had the DC9 insight and we could maintain visual separation. The tower cleared us to maintain visual separation and turn to a heading of 270 degree maintain 2500 ft MSL. The DC9 was cleared to 5000 ft MSL and runway heading. As the DC9 was parallel to us and he'd climbed through our altitude which was level at 2500 ft MSL we started a turn to 270 degree from runway heading. The DC9 pilot was very upset about not being told about us and that we passed underneath him. We did not want to pass behind the DC9 and risk going through his wake so we turned to pass underneath him. By my visual guess we were at least 500 ft below the DC9 and passed about underneath his mid fuselage. On further consideration of this situation, I believe that we should not have turned as soon as we did to pass underneath the DC9. But also I believe that the tower controller should not have issued the DC9 takeoff clearance in such a close proximity to our takeoff. The DC9 captain was very upset about this situation and requested the ATC facility phone number. My opinion is that neither aircraft were in any danger at the time but the situation could have been avoided all together with a little more planning on ATC's part, and a little more forethought about going under the DC9 on my part.

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Original NASA ASRS Text

Title: DURING DEP FROM PARALLEL RWYS, RPTR CROSSED UNDERNEATH ANOTHER DEPARTING ACFT UNDER VISUAL TWR SEPARATION CLRNC CAUSING A COMPLAINT BY THE FLC OF THE OTHER ACFT.

Narrative: TAKING OFF RWY 23L IN IND THE TWR CTLR CLRED A DC9 TO TKOF RWY 23R IMMEDIATELY AFTER. TWR CTLR TOLD US OF THE DC9 COMING OFF RWY 23R AND ASKED US IF WE COULD MAINTAIN VISUAL SEPARATION. THE FO WAS FLYING AND I WAS PERFORMING THE NON FLYING FUNCTION WHICH INCLUDED TFC WATCH. I TOLD TWR THAT I HAD THE DC9 INSIGHT AND WE COULD MAINTAIN VISUAL SEPARATION. THE TWR CLRED US TO MAINTAIN VISUAL SEPARATION AND TURN TO A HDG OF 270 DEG MAINTAIN 2500 FT MSL. THE DC9 WAS CLRED TO 5000 FT MSL AND RWY HDG. AS THE DC9 WAS PARALLEL TO US AND HE'D CLBED THROUGH OUR ALT WHICH WAS LEVEL AT 2500 FT MSL WE STARTED A TURN TO 270 DEG FROM RWY HDG. THE DC9 PLT WAS VERY UPSET ABOUT NOT BEING TOLD ABOUT US AND THAT WE PASSED UNDERNEATH HIM. WE DID NOT WANT TO PASS BEHIND THE DC9 AND RISK GOING THROUGH HIS WAKE SO WE TURNED TO PASS UNDERNEATH HIM. BY MY VISUAL GUESS WE WERE AT LEAST 500 FT BELOW THE DC9 AND PASSED ABOUT UNDERNEATH HIS MID FUSELAGE. ON FURTHER CONSIDERATION OF THIS SIT, I BELIEVE THAT WE SHOULD NOT HAVE TURNED AS SOON AS WE DID TO PASS UNDERNEATH THE DC9. BUT ALSO I BELIEVE THAT THE TWR CTLR SHOULD NOT HAVE ISSUED THE DC9 TKOF CLRNC IN SUCH A CLOSE PROX TO OUR TKOF. THE DC9 CAPT WAS VERY UPSET ABOUT THIS SIT AND REQUESTED THE ATC FACILITY PHONE NUMBER. MY OPINION IS THAT NEITHER ACFT WERE IN ANY DANGER AT THE TIME BUT THE SIT COULD HAVE BEEN AVOIDED ALL TOGETHER WITH A LITTLE MORE PLANNING ON ATC'S PART, AND A LITTLE MORE FORETHOUGHT ABOUT GOING UNDER THE DC9 ON MY PART.

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.