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ZID ARTCC controller climbed an air carrier B757 to FL310 through an altitude occupied by an air carrier B737 at FL270.
| Attributes | |
| ACN | 560908 |
| Time | |
| Date | 200209 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : vhp.vortac |
| State Reference | IN |
| Altitude | msl single value : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc tower : tul.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute airway : j89.airway |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 20 |
| ASRS Report | 560908 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar/mode c other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 27000 vertical : 200 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Environmental Factor ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft Y northbound on J89. Climbed aircraft X to FL260. Vector lines showed ample separation. Climbed aircraft X to FL310. Wind slowed aircraft X's ground speed enough to lose separation. Conflict alert activated after separation was lost (FL272). Aircraft X climbed through FL270 after passing aircraft Y separation was lost on the back side. Sector was too busy with aircraft.
Original NASA ASRS Text
Title: ZID ARTCC CTLR CLBED AN ACR B757 TO FL310 THROUGH AN ALT OCCUPIED BY AN ACR B737 AT FL270.
Narrative: ACFT Y NBOUND ON J89. CLBED ACFT X TO FL260. VECTOR LINES SHOWED AMPLE SEPARATION. CLBED ACFT X TO FL310. WIND SLOWED ACFT X'S GND SPD ENOUGH TO LOSE SEPARATION. CONFLICT ALERT ACTIVATED AFTER SEPARATION WAS LOST (FL272). ACFT X CLBED THROUGH FL270 AFTER PASSING ACFT Y SEPARATION WAS LOST ON THE BACK SIDE. SECTOR WAS TOO BUSY WITH ACFT.
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.