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Approach controller at ord claims that an arring B767 on an ILS runway 27L approach descended below the assigned altitude at the initial approach fix due to an unreliable localizer.
| Attributes | |
| ACN | 710842 |
| Time | |
| Date | 200609 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | msl single value : 4700 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Fog Rain |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | tracon : c90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 27l |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 3 controller radar : 18 controller time certified in position1 : 9 |
| ASRS Report | 710842 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Supplementary | |
| Problem Areas | Navigational Facility |
| Primary Problem | Navigational Facility |
| Situations | |
| Airport | other physical facility |
Narrative:
I was working runway 27L at ord. I instructed a B767 to cross wavie at 5000 ft cleared ILS runway 27L. The aircraft was established prior to wavie and shipped to ord tower prior to wavie. The B767 crossed wavie at 4700 ft with a parallel ILS runway 27R directly to the right and below the B767. This problem (unreliable localizer information); has been identified and forwarded to C90 management numerous times. This problem has obviously gone ignored numerous times. I pray a mishap will not have to occur before this equipment is fixed.
Original NASA ASRS Text
Title: APCH CTLR AT ORD CLAIMS THAT AN ARRING B767 ON AN ILS RWY 27L APCH DSNDED BELOW THE ASSIGNED ALT AT THE INITIAL APCH FIX DUE TO AN UNRELIABLE LOC.
Narrative: I WAS WORKING RWY 27L AT ORD. I INSTRUCTED A B767 TO CROSS WAVIE AT 5000 FT CLRED ILS RWY 27L. THE ACFT WAS ESTABLISHED PRIOR TO WAVIE AND SHIPPED TO ORD TWR PRIOR TO WAVIE. THE B767 CROSSED WAVIE AT 4700 FT WITH A PARALLEL ILS RWY 27R DIRECTLY TO THE RIGHT AND BELOW THE B767. THIS PROB (UNRELIABLE LOCALIZER INFO); HAS BEEN IDENTIFIED AND FORWARDED TO C90 MANAGEMENT NUMEROUS TIMES. THIS PROB HAS OBVIOUSLY GONE IGNORED NUMEROUS TIMES. I PRAY A MISHAP WILL NOT HAVE TO OCCUR BEFORE THIS EQUIP IS FIXED.
Data retrieved from NASA's ASRS site as of January 2009 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.