AN LGT ACR MISSED ITS XING ALT ON STAR INTO ATL.
Synopsis
AN LGT ACR MISSED ITS XING ALT ON STAR INTO ATL.
Narrative
WHEN ATLANTA APCH ISSUED A DSCNT CLRNC TO 'CROSS TIROE AT 14000 FT' I MISINTERPRETED TIROE INTXN TO BE 40 DME FROM LA GRANGE VORTAC AND BASED MY DSCNT CALCULATION ON THAT INFO. AFTER PASSING HONIE INTXN (12 DME NE OF LA GRANGE VORTAC); THE CAPT TUNED THE #1 VOR RECEIVER TO ATL VORTAC AND NOTICED A DISCREPANCY IN THE MILEAGES. WE WERE APPROX 39 DME SE OF ATL VORTAC. WE RECHKED THE STAR AND DETERMINED THAT WE HAD 10 MI TO GO AND 5000 FT TO LOSE BEFORE WE GOT TO TIROE INTXN. I EXPEDITED OUR DSCNT AND CONSEQUENTLY LEVELED AT 14000 FT; APPROX 4 MI LATE. WE WERE UNABLE TO ADVISE ATC OF OUR MISTAKE DUE TO RADIO CONGESTION AND THE CTLR MADE NO COMMENT WHEN HE GAVE US OUR HDOF. TO HELP PRECLUDE THIS FROM HAPPENING TO SOMEONE ELSE; MAYBE SOMEONE COULD REVIEW THIS CHART (STAR) AND COME UP WITH A DIFFERENT FORMAT FOR DISTANCES BTWN LA GRANGE VORTAC AND ATLANTA VORTAC. JUST BTWN HONIE INTXN AND TIROE INTXN THERE ARE 3 DIFFERENT MILEAGES. SUPPLEMENTAL INFO FROM ACN 226646: ON THE CHART; BTWN HONIE AND TIROE (ABOUT 3/4 INCH IN SIZE); THERE ARE 3 DIFFERENT MILEAGES ALONG THE COURSE ARROW. I WOULD SUGGEST REFORMATTING THE STAR TO ELIMINATE ANY CONFUSION.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.