Narrative:

An air carrier X commuter recently began flying in and out of cvg. Air carrier X uses the dornier J328 aircraft. When vectoring this aircraft for sequence, they always seem to track differently than other type aircraft on the same heading and altitude. Ie, if we have 3 J328 aircraft and 3 carj aircraft heading 180 degrees at 7000 ft in a downwind for sequence, the J328 will not fly the same track as the carj. There must be a software glitch in the aircraft navigation computer. Callback conversation with reporter revealed the following information: reporter stated the aircraft are still flying courses that are different from other aircraft on the same heading. He said it has been mentioned to the office staff for follow up with the company.

Related reports:

Google
 

Original NASA ASRS Text

Title: RPTR AT CVG CLAIMS D328 ACFT OF THE SAME COMPANY PUT ON VECTORS APPEAR TO BE ON A DIFFERENT COURSE THAN OTHER TYPES OF ACFT ON THE SAME HDG AND ALT.

Narrative: AN ACR X COMMUTER RECENTLY BEGAN FLYING IN AND OUT OF CVG. ACR X USES THE DORNIER J328 ACFT. WHEN VECTORING THIS ACFT FOR SEQUENCE, THEY ALWAYS SEEM TO TRACK DIFFERENTLY THAN OTHER TYPE ACFT ON THE SAME HDG AND ALT. IE, IF WE HAVE 3 J328 ACFT AND 3 CARJ ACFT HDG 180 DEGS AT 7000 FT IN A DOWNWIND FOR SEQUENCE, THE J328 WILL NOT FLY THE SAME TRACK AS THE CARJ. THERE MUST BE A SOFTWARE GLITCH IN THE ACFT NAV COMPUTER. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THE ACFT ARE STILL FLYING COURSES THAT ARE DIFFERENT FROM OTHER ACFT ON THE SAME HDG. HE SAID IT HAS BEEN MENTIONED TO THE OFFICE STAFF FOR FOLLOW UP WITH THE COMPANY.

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.