Narrative:

Departing from dtw on the clare 2 departure; we were flying the departure. During our predep briefing; we reviewed the departure together in the cockpit and went through the waypoints; we believed we had performed this duty diligently. However; while with ZFW climbing to FL330 we were asked if we were still on the departure or where were we going. I looked at the pfd and it had us direct to swb at that time. Either tekbe was dropped from the departure; because I had seen poten prior to being asked where we were going and since I saw the captain select the swb transition in the box prior to departure; I believed we were on our assigned route and cleared. Once told of our error by ATC; we made an immediate left turn to tekbe and could not have been more than 3 NM laterally from it after this we were asked to call ZFW due to possible pilot deviation. The rest of the flight was uneventful. Callback conversation with reporter revealed the following information: the reporter was adamant that all required route checks; including a comparison to the paper procedure; were performed and that all appropriate waypoints were in the active route. Reporter was equally certain that neither the CDU or the moving map display showed any evidence of a route discontinuity.

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Original NASA ASRS Text

Title: MD80 FLYING CLARE RNAV SID SWB TRANSITION FROM DFW DROPS SECOND OF 3 WAYPOINTS ON THE TRANSITION. ACFT ATTEMPTS TO FLY POTEN DIRECT TO SWB.

Narrative: DEPARTING FROM DTW ON THE CLARE 2 DEP; WE WERE FLYING THE DEP. DURING OUR PREDEP BRIEFING; WE REVIEWED THE DEP TOGETHER IN THE COCKPIT AND WENT THROUGH THE WAYPOINTS; WE BELIEVED WE HAD PERFORMED THIS DUTY DILIGENTLY. HOWEVER; WHILE WITH ZFW CLBING TO FL330 WE WERE ASKED IF WE WERE STILL ON THE DEP OR WHERE WERE WE GOING. I LOOKED AT THE PFD AND IT HAD US DIRECT TO SWB AT THAT TIME. EITHER TEKBE WAS DROPPED FROM THE DEP; BECAUSE I HAD SEEN POTEN PRIOR TO BEING ASKED WHERE WE WERE GOING AND SINCE I SAW THE CAPT SELECT THE SWB TRANSITION IN THE BOX PRIOR TO DEP; I BELIEVED WE WERE ON OUR ASSIGNED RTE AND CLRED. ONCE TOLD OF OUR ERROR BY ATC; WE MADE AN IMMEDIATE L TURN TO TEKBE AND COULD NOT HAVE BEEN MORE THAN 3 NM LATERALLY FROM IT AFTER THIS WE WERE ASKED TO CALL ZFW DUE TO POSSIBLE PLTDEV. THE REST OF THE FLT WAS UNEVENTFUL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR WAS ADAMANT THAT ALL REQUIRED RTE CHKS; INCLUDING A COMPARISON TO THE PAPER PROC; WERE PERFORMED AND THAT ALL APPROPRIATE WAYPOINTS WERE IN THE ACTIVE RTE. RPTR WAS EQUALLY CERTAIN THAT NEITHER THE CDU OR THE MOVING MAP DISPLAY SHOWED ANY EVIDENCE OF A RTE DISCONTINUITY.

Data retrieved from NASA's ASRS site as of January 2009 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.