Narrative:

We were cleared visual approach to 9R at ord. The ILS was tuned and showed intermittent flags. On short final and lined up with the runway, the GPWS gave 'GS' warning when we were actually slightly high. This was the crew's first flight to ord so we chose to go around and get a vector from tower. Tower confirmed our alignment with 9R and we landed without further incident.

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Original NASA ASRS Text

Title: LGT FLC HAD GPWS AT 300 AGL MADE GAR REALIGNED AND WHEN CONFIRMED BY TWR, MADE LNDG.

Narrative: WE WERE CLRED VISUAL APCH TO 9R AT ORD. THE ILS WAS TUNED AND SHOWED INTERMITTENT FLAGS. ON SHORT FINAL AND LINED UP WITH THE RWY, THE GPWS GAVE 'GS' WARNING WHEN WE WERE ACTUALLY SLIGHTLY HIGH. THIS WAS THE CREW'S FIRST FLT TO ORD SO WE CHOSE TO GAR AND GET A VECTOR FROM TWR. TWR CONFIRMED OUR ALIGNMENT WITH 9R AND WE LANDED WITHOUT FURTHER INCIDENT.

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.