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ARTCC controller step climbing two air carrier aircraft, gives wrong aircraft climb clearance and has less than standard separation.
| Attributes | |
| ACN | 167724 |
| Time | |
| Date | 199012 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : fbr |
| State Reference | WY |
| Altitude | msl bound lower : 29000 msl bound upper : 29300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zlc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : zlc |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 167724 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 21000 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I took handoffs on 2 aircraft that had departed slc and were climbing and converging to cross courses. Accepting the handoffs medium large transport X was out of FL280 climbing to FL290. Large transport Y was climbing to FL270. Both wanted FL330. I step climbed them to FL290 medium large transport X and FL310 large transport Y (there wasn't going to be enough lateral sep). When I went to climb the top aircraft to FL330 I glanced at the 2 data blocks while I was also sequencing strips in the sector bays and gave the climb clearance to the lower altitude aircraft large transport Y. At next glance after strip sequencing I saw my mistake and took corrective action. I had lost 300' of 2000' required sep. Lateral sep was 3 1/2 mi (5 required).
Original NASA ASRS Text
Title: ARTCC CTLR STEP CLIMBING TWO ACR ACFT, GIVES WRONG ACFT CLIMB CLRNC AND HAS LESS THAN STANDARD SEPARATION.
Narrative: I TOOK HDOFS ON 2 ACFT THAT HAD DEPARTED SLC AND WERE CLBING AND CONVERGING TO CROSS COURSES. ACCEPTING THE HDOFS MLG X WAS OUT OF FL280 CLBING TO FL290. LGT Y WAS CLBING TO FL270. BOTH WANTED FL330. I STEP CLBED THEM TO FL290 MLG X AND FL310 LGT Y (THERE WASN'T GOING TO BE ENOUGH LATERAL SEP). WHEN I WENT TO CLB THE TOP ACFT TO FL330 I GLANCED AT THE 2 DATA BLOCKS WHILE I WAS ALSO SEQUENCING STRIPS IN THE SECTOR BAYS AND GAVE THE CLB CLRNC TO THE LOWER ALT ACFT LGT Y. AT NEXT GLANCE AFTER STRIP SEQUENCING I SAW MY MISTAKE AND TOOK CORRECTIVE ACTION. I HAD LOST 300' OF 2000' REQUIRED SEP. LATERAL SEP WAS 3 1/2 MI (5 REQUIRED).
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.