 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Operational error when controller attempts to climb air carrier X from FL310 to FL370 and then vector it away from air carrier Y at FL350. Less than standard separation.
| Attributes | |
| ACN | 364823 |
| Time | |
| Date | 199703 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : bsv |
| State Reference | OH |
| Altitude | msl bound lower : 35000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 5 controller radar : 9 |
| ASRS Report | 364823 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 15000 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I climbed air carrier X to FL310. Lorain sector approved a climb to FL370 with respect to traffic at FL330 direct jst FL350 J64 wbound at ewc. Traffic at FL370 near aco really was not a factor. I climbed air carrier X to FL330 to evaluate his rate of climb. He was climbing at 3000 FPM, so I made the decision to continue his climb to FL370. Air carrier Y was his traffic at FL350. As air carrier X approached FL350, his rate of climb slowed considerably. I turned air carrier X to the right 30 degrees to move the confliction point and to buy time until air carrier X reached FL370. The turn wasn't working as well as the rate of climb. At this point I knew I was going to lose separation, my only concern now was to keep the airplanes from hitting. In retrospect I should have left air carrier X at FL300 and apreqed the altitude with belcaire sector and left the aircraft on course.
Original NASA ASRS Text
Title: OPERROR WHEN CTLR ATTEMPTS TO CLB ACR X FROM FL310 TO FL370 AND THEN VECTOR IT AWAY FROM ACR Y AT FL350. LTSS.
Narrative: I CLBED ACR X TO FL310. LORAIN SECTOR APPROVED A CLB TO FL370 WITH RESPECT TO TFC AT FL330 DIRECT JST FL350 J64 WBOUND AT EWC. TFC AT FL370 NEAR ACO REALLY WAS NOT A FACTOR. I CLBED ACR X TO FL330 TO EVALUATE HIS RATE OF CLB. HE WAS CLBING AT 3000 FPM, SO I MADE THE DECISION TO CONTINUE HIS CLB TO FL370. ACR Y WAS HIS TFC AT FL350. AS ACR X APCHED FL350, HIS RATE OF CLB SLOWED CONSIDERABLY. I TURNED ACR X TO THE R 30 DEGS TO MOVE THE CONFLICTION POINT AND TO BUY TIME UNTIL ACR X REACHED FL370. THE TURN WASN'T WORKING AS WELL AS THE RATE OF CLB. AT THIS POINT I KNEW I WAS GOING TO LOSE SEPARATION, MY ONLY CONCERN NOW WAS TO KEEP THE AIRPLANES FROM HITTING. IN RETROSPECT I SHOULD HAVE LEFT ACR X AT FL300 AND APREQED THE ALT WITH BELCAIRE SECTOR AND LEFT THE ACFT ON COURSE.
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.