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A departing air carrier selects beacon code assigned to a subsequent air carrier causing controller confusion and an early turn into an IFR small aircraft. Less than standard separation.
| Attributes | |
| ACN | 250473 |
| Time | |
| Date | 199309 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : pdx |
| State Reference | OR |
| Altitude | agl bound lower : 0 agl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : pdx tower : pdx |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : initial |
| Route In Use | departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : initial |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Experience | controller radar : 16 |
| ASRS Report | 250473 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure non adherence : far non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 1500 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure Pilot Deviation |
Narrative:
In sum: check ride taking place on radar position. An small aircraft already in the air is given an IFR clearance. Several air carrier departures take off, but the first one is using the wrong beacon code and the controller identifies the wrong aircraft. A subsequent departing air carrier is misidented and issued a turn right after takeoff and conflicts with the small aircraft. Controllers are confused. Tower controller did not ensure that aircraft were on their proper beacon codes and not 'quick looking' the south sector radar position. System error occurred.
Original NASA ASRS Text
Title: A DEPARTING ACR SELECTS BEACON CODE ASSIGNED TO A SUBSEQUENT ACR CAUSING CTLR CONFUSION AND AN EARLY TURN INTO AN IFR SMA. LTSS.
Narrative: IN SUM: CHK RIDE TAKING PLACE ON RADAR POS. AN SMA ALREADY IN THE AIR IS GIVEN AN IFR CLRNC. SEVERAL ACR DEPS TAKE OFF, BUT THE FIRST ONE IS USING THE WRONG BEACON CODE AND THE CTLR IDENTIFIES THE WRONG ACFT. A SUBSEQUENT DEPARTING ACR IS MISIDENTED AND ISSUED A TURN RIGHT AFTER TKOF AND CONFLICTS WITH THE SMA. CTLRS ARE CONFUSED. TWR CTLR DID NOT ENSURE THAT ACFT WERE ON THEIR PROPER BEACON CODES AND NOT 'QUICK LOOKING' THE S SECTOR RADAR POS. SYS ERROR 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.