 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Corporate H25C PIC report regarding oscillations of the localizer course on ILS approach for runway 12R at stl.
| Attributes | |
| ACN | 636823 |
| Time | |
| Date | 200411 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : stl.airport |
| State Reference | MO |
| Altitude | agl bound lower : 0 agl bound upper : 2000 |
| Environment | |
| Flight Conditions | Mixed |
| Weather Elements | Rain Fog Turbulence |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : t75.tracon tower : stl.tower |
| Operator | general aviation : corporate |
| Make Model Name | BAe 125 Series 1000 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | ils localizer & glide slope : 12r |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 25000 flight time type : 1500 |
| ASRS Report | 636823 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Events | |
| Anomaly | inflight encounter : weather other spatial deviation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : loc and fd other flight crewa other flight crewb |
| Resolutory Action | flight crew : overrode automation |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | Navigational Facility Weather Flight Crew Human Performance FAA ATC Human Performance |
| Situations | |
| Airport | other physical facility procedure or policy : stl.airport |
| Navigational Aid | ILS.ILS |
Narrative:
The ILS localizer to runway 12R at stl is very erratic. This has been the case for at least 15 yrs. All reports to the control tower are noted but the localizer remains very erratic jumping from side to side. Cleared for ILS runway 12R. WX 11000 ft 5 mi in mist. ILS identify clear and strong. Needle as always swings erratically from side to side. Use of flight director in navigation mode is impossible. We broke out right of centerline in the area of new unopened runway. Visually acquired runway and completed approach after being cleared for a visual approach. Callback conversation with reporter revealed the following information: the PIC stated that he has observed this extreme oscillating of the localizer as a problem for some time and has reported it verbally to local and ground controllers at stl. He further stated that he sometimes 'gets it back' inside the LOM. On this occasion, when changing to local controller, he heard half of a conversation where the previous flight was reporting the same problem to the tower. The controller responded with a, 'it monitors ok.' reporter told local and ground of his problem as well. Reporter intends to have the corporation place a notice in a reporting source regarding this runway 12R localizer problem.
Original NASA ASRS Text
Title: CORPORATE H25C PIC RPT REGARDING OSCILLATIONS OF THE LOC COURSE ON ILS APCH FOR RWY 12R AT STL.
Narrative: THE ILS LOC TO RWY 12R AT STL IS VERY ERRATIC. THIS HAS BEEN THE CASE FOR AT LEAST 15 YRS. ALL RPTS TO THE CTL TWR ARE NOTED BUT THE LOC REMAINS VERY ERRATIC JUMPING FROM SIDE TO SIDE. CLRED FOR ILS RWY 12R. WX 11000 FT 5 MI IN MIST. ILS IDENT CLR AND STRONG. NEEDLE AS ALWAYS SWINGS ERRATICALLY FROM SIDE TO SIDE. USE OF FLT DIRECTOR IN NAV MODE IS IMPOSSIBLE. WE BROKE OUT RIGHT OF CTRLINE IN THE AREA OF NEW UNOPENED RWY. VISUALLY ACQUIRED RWY AND COMPLETED APCH AFTER BEING CLRED FOR A VISUAL APCH. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE PIC STATED THAT HE HAS OBSERVED THIS EXTREME OSCILLATING OF THE LOCALIZER AS A PROB FOR SOME TIME AND HAS RPTED IT VERBALLY TO LCL AND GND CTLRS AT STL. HE FURTHER STATED THAT HE SOMETIMES 'GETS IT BACK' INSIDE THE LOM. ON THIS OCCASION, WHEN CHANGING TO LCL CTLR, HE HEARD HALF OF A CONVERSATION WHERE THE PREVIOUS FLT WAS RPTING THE SAME PROB TO THE TWR. THE CTLR RESPONDED WITH A, 'IT MONITORS OK.' RPTR TOLD LCL AND GND OF HIS PROB AS WELL. RPTR INTENDS TO HAVE THE CORPORATION PLACE A NOTICE IN A RPTING SOURCE REGARDING THIS RWY 12R LOCALIZER PROB.
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.