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Relieving D21 controller is alerted by an air carrier flight crew of expected clearance. The relieved D21 controller had briefed that all control actions were complete.
| Attributes | |
| ACN | 507946 |
| Time | |
| Date | 200104 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dtw.airport |
| State Reference | MI |
| Altitude | msl single value : 3600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d21.tracon tower : lax.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Aircraft 2 | |
| Controlling Facilities | tracon : d21.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | HS 125 Series 1-600 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : military controller : radar |
| Experience | controller military : 4 controller radar : 19 |
| ASRS Report | 507946 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued advisory controller : separated traffic controller : issued new clearance |
| Miss Distance | horizontal : 9000 vertical : 400 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
I was relieving the 'a' controller at the arrival position. Once settled in, I was to combine the 2 feeder position and the other arrival position. Routine. The 'G' controller appeared to have everything squared away -- all the arrs were in sequence. His briefing was that 'everyone is cleared and switched except for air carrier X.' my question was, 'they are all on tower frequency except air carrier X?' response, 'yes.' the appearance of the final and the words/briefing led me to believe that all were cleared. Air carrier X was in actuality only on base leg and not cleared. Air carrier X crossed the localizer (while I was getting the feeder position squared away) and crossed underneath a BA46B on the opposite base leg for the same runway. The air carrier X pilot's question that alerted me was, 'did you want me to turn in?' I issued the traffic and with the visual response I instructed air carrier X to maintain visual separation. Bottom line is that west sometimes get too lackadaisical about our briefings. Critical items should be taken care of before relief. And finally, questions I should have asked weren't asked because of how everything appeared. Be very clear in your briefings (both controllers).
Original NASA ASRS Text
Title: RELIEVING D21 CTLR IS ALERTED BY AN ACR FLC OF EXPECTED CLRNC. THE RELIEVED D21 CTLR HAD BRIEFED THAT ALL CTL ACTIONS WERE COMPLETE.
Narrative: I WAS RELIEVING THE 'A' CTLR AT THE ARR POS. ONCE SETTLED IN, I WAS TO COMBINE THE 2 FEEDER POS AND THE OTHER ARR POS. ROUTINE. THE 'G' CTLR APPEARED TO HAVE EVERYTHING SQUARED AWAY -- ALL THE ARRS WERE IN SEQUENCE. HIS BRIEFING WAS THAT 'EVERYONE IS CLRED AND SWITCHED EXCEPT FOR ACR X.' MY QUESTION WAS, 'THEY ARE ALL ON TWR FREQ EXCEPT ACR X?' RESPONSE, 'YES.' THE APPEARANCE OF THE FINAL AND THE WORDS/BRIEFING LED ME TO BELIEVE THAT ALL WERE CLRED. ACR X WAS IN ACTUALITY ONLY ON BASE LEG AND NOT CLRED. ACR X CROSSED THE LOC (WHILE I WAS GETTING THE FEEDER POS SQUARED AWAY) AND CROSSED UNDERNEATH A BA46B ON THE OPPOSITE BASE LEG FOR THE SAME RWY. THE ACR X PLT'S QUESTION THAT ALERTED ME WAS, 'DID YOU WANT ME TO TURN IN?' I ISSUED THE TFC AND WITH THE VISUAL RESPONSE I INSTRUCTED ACR X TO MAINTAIN VISUAL SEPARATION. BOTTOM LINE IS THAT W SOMETIMES GET TOO LACKADAISICAL ABOUT OUR BRIEFINGS. CRITICAL ITEMS SHOULD BE TAKEN CARE OF BEFORE RELIEF. AND FINALLY, QUESTIONS I SHOULD HAVE ASKED WEREN'T ASKED BECAUSE OF HOW EVERYTHING APPEARED. BE VERY CLR IN YOUR BRIEFINGS (BOTH CTLRS).
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.