Narrative:

On the bojid arrival into phl, we crossed over jst VOR on the arrival when we were corrected by ATC asking our position. We acknowledged being on the arrival proceeding to bunts intersection. He said we were taking a shortcut and gave us a vector to rejoin the arrival. At that point we both noticed that certain waypoints had dropped out on the arrival and that we were proceeding directly to bunts intersection. We rejoined the arrival into phl without any further problems. Even though we had correctly checked that the waypoints were there on our departure, we should have rechked once we got on the arrival.

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Original NASA ASRS Text

Title: FLC OF AN AIRBUS 319 WENT OFF ARR COURSE DUE TO NAV COMPUTER DROPPING PLANNED PROGRAM RTE RESULTING IN ARTCC CLR INTERVENTION TO VECTOR THEM BACK ON TRACK.

Narrative: ON THE BOJID ARR INTO PHL, WE CROSSED OVER JST VOR ON THE ARR WHEN WE WERE CORRECTED BY ATC ASKING OUR POS. WE ACKNOWLEDGED BEING ON THE ARR PROCEEDING TO BUNTS INTXN. HE SAID WE WERE TAKING A SHORTCUT AND GAVE US A VECTOR TO REJOIN THE ARR. AT THAT POINT WE BOTH NOTICED THAT CERTAIN WAYPOINTS HAD DROPPED OUT ON THE ARR AND THAT WE WERE PROCEEDING DIRECTLY TO BUNTS INTXN. WE REJOINED THE ARR INTO PHL WITHOUT ANY FURTHER PROBS. EVEN THOUGH WE HAD CORRECTLY CHKED THAT THE WAYPOINTS WERE THERE ON OUR DEP, WE SHOULD HAVE RECHKED ONCE WE GOT ON THE ARR.

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.