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ZNY controller experienced operational error at FL250 when trying to vector aircraft behind another aircraft.
| Attributes | |
| ACN | 688669 |
| Time | |
| Date | 200602 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : slt.vortac |
| State Reference | PA |
| Altitude | msl single value : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller time certified in position1 : 10 |
| ASRS Report | 688669 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 19800 vertical : 600 |
| Supplementary | |
| Problem Areas | Environmental Factor ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 inbound to ewr level at FL250. Aircraft #2 level FL260 inbound to iad. Aircraft #2 descended to FL220. Aircraft #1 east with strong tailwind catches back end (north) at 5 mi bubble around aircraft #2 who was sebound 100 KTS slower. When conflict alert goes off aircraft #2 is told to descend rapidly to FL220. Aircraft #1 is told to turn 30 degrees left. Separation (5 mi) was lost. Instruction was being given at the time of the operational error. Procedures on another aircraft in the sector was being discussed that diverted instructor's (me) attention.
Original NASA ASRS Text
Title: ZNY CTLR EXPERIENCED OPERROR AT FL250 WHEN TRYING TO VECTOR ACFT BEHIND ANOTHER ACFT.
Narrative: ACFT #1 INBOUND TO EWR LEVEL AT FL250. ACFT #2 LEVEL FL260 INBOUND TO IAD. ACFT #2 DSNDED TO FL220. ACFT #1 E WITH STRONG TAILWIND CATCHES BACK END (N) AT 5 MI BUBBLE AROUND ACFT #2 WHO WAS SEBOUND 100 KTS SLOWER. WHEN CONFLICT ALERT GOES OFF ACFT #2 IS TOLD TO DSND RAPIDLY TO FL220. ACFT #1 IS TOLD TO TURN 30 DEGS L. SEPARATION (5 MI) WAS LOST. INSTRUCTION WAS BEING GIVEN AT THE TIME OF THE OPERROR. PROCS ON ANOTHER ACFT IN THE SECTOR WAS BEING DISCUSSED THAT DIVERTED INSTRUCTOR'S (ME) ATTN.
Data retrieved from NASA's ASRS site as of January 2009 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.