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MD80 crew was issued a 'contact approach' by the ATCT local controller after the ILS signal failed on runway 18R at okc.
| Attributes | |
| ACN | 543688 |
| Time | |
| Date | 200204 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : okc.airport |
| State Reference | OK |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tower : okc.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 18r other |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision approach : contact |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 543688 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | other |
| Supplementary | |
| Problem Areas | ATC Human Performance Navigational Facility |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
Narrative:
Contact approach. On the ILS runway 18R approach at okc, ILS signal failed at about 8 NM. We had field at about 6 NM on the GPS. Tower cleared us for the contact approach and cleared to land. This was difficult to analyze due to a very time-compressed event. We are not allowed to do contact approachs and ATC cannot initiate this anyway.
Original NASA ASRS Text
Title: MD80 CREW WAS ISSUED A 'CONTACT APCH' BY THE ATCT LCL CTLR AFTER THE ILS SIGNAL FAILED ON RWY 18R AT OKC.
Narrative: CONTACT APCH. ON THE ILS RWY 18R APCH AT OKC, ILS SIGNAL FAILED AT ABOUT 8 NM. WE HAD FIELD AT ABOUT 6 NM ON THE GPS. TWR CLRED US FOR THE CONTACT APCH AND CLRED TO LAND. THIS WAS DIFFICULT TO ANALYZE DUE TO A VERY TIME-COMPRESSED EVENT. WE ARE NOT ALLOWED TO DO CONTACT APCHS AND ATC CANNOT INITIATE THIS ANYWAY.
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.