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Air carrier X climb to occupied altitude TCASII RA had less than standard separation with Y. System error. Evasive action taken.
| Attributes | |
| ACN | 273331 |
| Time | |
| Date | 199406 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : orl |
| State Reference | FL |
| Altitude | msl bound lower : 8000 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mco |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Experience | controller radar : 10 |
| ASRS Report | 273331 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 160 flight time total : 16000 |
| ASRS Report | 272691 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 7000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Y was an 8000 ft overflt nwbound. Air carrier X was climbed to 8000 ft and turned wbound -- heading 270 degrees. I thought I had cleared X to 7000 ft and issued the 8000 ft traffic to X. Due to a data block congestion, I did not see X depart 700 ft climbing to 8000 ft. When I realized X was at 8000 ft, I gave him a traffic alert. He then stated he had traffic in sight. Supplemental information from acn 272691: air carrier X on climb out from orlando airport. Departure control gave us a turn to 270 degrees and climb to 8000 ft. Shortly thereafter, we encountered a TCASII alert as we were about to level off at 8000 ft. Controller advised of traffic alert and said we were cleared to 7000 ft. We took evasive action by turning sbound and descending. The controller then gave us a heading of 180 degrees and we leveled at 7000 ft. Both pilots are certain we were cleared to 8000 ft.
Original NASA ASRS Text
Title: ACR X CLB TO OCCUPIED ALT TCASII RA HAD LTSS WITH Y. SYS ERROR. EVASIVE ACTION TAKEN.
Narrative: Y WAS AN 8000 FT OVERFLT NWBOUND. ACR X WAS CLBED TO 8000 FT AND TURNED WBOUND -- HDG 270 DEGS. I THOUGHT I HAD CLRED X TO 7000 FT AND ISSUED THE 8000 FT TFC TO X. DUE TO A DATA BLOCK CONGESTION, I DID NOT SEE X DEPART 700 FT CLBING TO 8000 FT. WHEN I REALIZED X WAS AT 8000 FT, I GAVE HIM A TFC ALERT. HE THEN STATED HE HAD TFC IN SIGHT. SUPPLEMENTAL INFO FROM ACN 272691: ACR X ON CLBOUT FROM ORLANDO ARPT. DEP CTL GAVE US A TURN TO 270 DEGS AND CLB TO 8000 FT. SHORTLY THEREAFTER, WE ENCOUNTERED A TCASII ALERT AS WE WERE ABOUT TO LEVEL OFF AT 8000 FT. CTLR ADVISED OF TFC ALERT AND SAID WE WERE CLRED TO 7000 FT. WE TOOK EVASIVE ACTION BY TURNING SBOUND AND DSNDING. THE CTLR THEN GAVE US A HDG OF 180 DEGS AND WE LEVELED AT 7000 FT. BOTH PLTS ARE CERTAIN WE WERE CLRED TO 8000 FT.
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.