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While sequencing on final approach, air carrier does not hear ATC instructions for turn resulting in less than standard separation with another air carrier.
| Attributes | |
| ACN | 188504 |
| Time | |
| Date | 199109 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : grr |
| State Reference | MI |
| Altitude | msl bound lower : 2700 msl bound upper : 2700 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : grr |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| ASRS Report | 188504 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 15000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I am an fpl approach controller at grr tower. I was working air carrier X on a right downwind for an ILS runway 26L approach. The WX was IFR and I received a sequence for air carrier X from the south controller to follow air carrier Y on a left base for ILS 26L approach. I heard the south controller turn the aircraft in on the ILS so I gave a 160 degree to obtain interval on final. A communications problem with air carrier Y and the south controller occurred. Air carrier Y never received any of the wbound turns and blew through the final. I turned air carrier X east and climbed. A loss of separation occurred. To be noted there is an unsatisfactory condition report (ucr) filed on communication system grr has. If we would have had the icss system, this situation would not have occurred.
Original NASA ASRS Text
Title: WHILE SEQUENCING ON FINAL APCH, ACR DOES NOT HEAR ATC INSTRUCTIONS FOR TURN RESULTING IN LTSS WITH ANOTHER ACR.
Narrative: I AM AN FPL APCH CTLR AT GRR TWR. I WAS WORKING ACR X ON A R DOWNWIND FOR AN ILS RWY 26L APCH. THE WX WAS IFR AND I RECEIVED A SEQUENCE FOR ACR X FROM THE S CTLR TO FOLLOW ACR Y ON A L BASE FOR ILS 26L APCH. I HEARD THE S CTLR TURN THE ACFT IN ON THE ILS SO I GAVE A 160 DEG TO OBTAIN INTERVAL ON FINAL. A COMS PROBLEM WITH ACR Y AND THE S CTLR OCCURRED. ACR Y NEVER RECEIVED ANY OF THE WBOUND TURNS AND BLEW THROUGH THE FINAL. I TURNED ACR X E AND CLBED. A LOSS OF SEPARATION OCCURRED. TO BE NOTED THERE IS AN UNSATISFACTORY CONDITION RPT (UCR) FILED ON COM SYS GRR HAS. IF WE WOULD HAVE HAD THE ICSS SYS, THIS SITUATION WOULD NOT HAVE OCCURRED.
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.