|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||airport : osu|
|Altitude||msl bound lower : 3000|
msl bound upper : 3000
|Controlling Facilities||tracon : cmh|
|Operator||general aviation : corporate|
|Make Model Name||Light Transport, Low Wing, 2 Turboprop Eng|
|Flight Phase||descent : approach|
|Route In Use||enroute : on vectors|
|Function||flight crew : single pilot|
oversight : pic
|Qualification||pilot : atp|
|Experience||flight time last 90 days : 150|
flight time total : 8000
flight time type : 150
|Affiliation||government : faa|
|Function||controller : approach|
|Qualification||controller : radar|
|Anomaly||other spatial deviation|
|Independent Detector||other controllera|
|Air Traffic Incident||other|
|ATC Facility||other physical facility|
As a general practice, cmh approach control routes traffic going into osu, coming from the south, to the east and north of cmh and turns them in on the NDB 27L approach for osu. We were being vectored by cmh approach at 3000' MSL when we were given a heading of 300 degrees. We were then issued the following clearance: '(light transport) on the 300 degree heading, intercept the NDB 27L approach course, cleared for the NDB 27L at osu.' we acknowledged the clearance. We had the NDB set for the approach (tuned and idented) and were using our area navigation set on osu as a back-up reference. Shortly after he (controller) issued the approach clearance, both our #1 RMI needles (set on the NDB at osu) and our RNAV indicated we were intercepting the inbound course of 276 degrees. I turned to 276 degrees. Within 15-20 seconds after I turned, the controller asked if we were on the 300 degree heading. The PNF said we had been cleared for the approach and were tracking inbound. The controller said, 'turn right, turn right!!' I, as captain, asked the controller what the problem was. He said we were 3 mi south of course. I told him we were showing on course and the 27L runway at osu was in sight. The other runway at osu (9R) is served by an ILS. If cmh approach is going to vector aircraft onto the 27L approach course, which is in close proximity to cmh (the main airport), it should have a more accurate approach than the NDB to 276. This is about the fourth or fifth time I have heard cmh approach tell aircraft they are showing them north or south of course while on the 27L approach. Possibly their radar is poorly aligned in that sector also.
Original NASA ASRS Text
Title: MTT ON NDB APCH IN VMC WITH RWY IN SIGHT WAS ADVISED 3 MI OFF TRACK BY ATC. DEVIATION DENIED CITING POSSIBLE RADAR MISALIGNMENT AND OTHER SIMILAR OCCURRENCES.
Narrative: AS A GENERAL PRACTICE, CMH APCH CTL ROUTES TFC GOING INTO OSU, COMING FROM THE S, TO THE E AND N OF CMH AND TURNS THEM IN ON THE NDB 27L APCH FOR OSU. WE WERE BEING VECTORED BY CMH APCH AT 3000' MSL WHEN WE WERE GIVEN A HDG OF 300 DEGS. WE WERE THEN ISSUED THE FOLLOWING CLRNC: '(LTT) ON THE 300 DEG HDG, INTERCEPT THE NDB 27L APCH COURSE, CLRED FOR THE NDB 27L AT OSU.' WE ACKNOWLEDGED THE CLRNC. WE HAD THE NDB SET FOR THE APCH (TUNED AND IDENTED) AND WERE USING OUR AREA NAV SET ON OSU AS A BACK-UP REF. SHORTLY AFTER HE (CTLR) ISSUED THE APCH CLRNC, BOTH OUR #1 RMI NEEDLES (SET ON THE NDB AT OSU) AND OUR RNAV INDICATED WE WERE INTERCEPTING THE INBND COURSE OF 276 DEGS. I TURNED TO 276 DEGS. WITHIN 15-20 SECS AFTER I TURNED, THE CTLR ASKED IF WE WERE ON THE 300 DEG HDG. THE PNF SAID WE HAD BEEN CLRED FOR THE APCH AND WERE TRACKING INBND. THE CTLR SAID, 'TURN RIGHT, TURN RIGHT!!' I, AS CAPT, ASKED THE CTLR WHAT THE PROB WAS. HE SAID WE WERE 3 MI S OF COURSE. I TOLD HIM WE WERE SHOWING ON COURSE AND THE 27L RWY AT OSU WAS IN SIGHT. THE OTHER RWY AT OSU (9R) IS SERVED BY AN ILS. IF CMH APCH IS GOING TO VECTOR ACFT ONTO THE 27L APCH COURSE, WHICH IS IN CLOSE PROX TO CMH (THE MAIN ARPT), IT SHOULD HAVE A MORE ACCURATE APCH THAN THE NDB TO 276. THIS IS ABOUT THE FOURTH OR FIFTH TIME I HAVE HEARD CMH APCH TELL ACFT THEY ARE SHOWING THEM N OR S OF COURSE WHILE ON THE 27L APCH. POSSIBLY THEIR RADAR IS POORLY ALIGNED IN THAT SECTOR ALSO.
Data retrieved from NASA's ASRS site as of August 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.