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Radar controller at ZNY misjudged closure rate between a climbing B757 and an A320 at cruise resulting in an operational error.
| Attributes | |
| ACN | 565178 |
| Time | |
| Date | 200211 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : bda.vortac |
| State Reference | FO |
| Altitude | msl single value : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 13 controller radar : 13 controller time certified in position1 : 13 |
| ASRS Report | 565178 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne critical non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar/mode c aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance none taken : insufficient time |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 30000 vertical : 800 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft X was in turbulence and requested higher from FL320 to FL380. Aircraft X was about 30 mi south of gabes intersection when the clearance was given. Aircraft Y was estimating gabes at XA29 which gave me 5 mins for the aircraft X to climb. The aircraft Y showed up on radar about XA23 at FL370. The aircraft X was at FL376 climbing. I called the traffic and turned the aircraft X to a 010 degree heading. I then asked aircraft X to say altitude and he reported leveling at FL380. The aircraft Y checked on the frequency and said that the aircraft X was 500 ft above on his TCASII. The aircraft X then said he showed 800 ft above the aircraft Y.
Original NASA ASRS Text
Title: RADAR CTLR AT ZNY MISJUDGED CLOSURE RATE BTWN A CLBING B757 AND AN A320 AT CRUISE RESULTING IN AN OPERROR.
Narrative: ACFT X WAS IN TURB AND REQUESTED HIGHER FROM FL320 TO FL380. ACFT X WAS ABOUT 30 MI S OF GABES INTXN WHEN THE CLRNC WAS GIVEN. ACFT Y WAS ESTIMATING GABES AT XA29 WHICH GAVE ME 5 MINS FOR THE ACFT X TO CLB. THE ACFT Y SHOWED UP ON RADAR ABOUT XA23 AT FL370. THE ACFT X WAS AT FL376 CLBING. I CALLED THE TFC AND TURNED THE ACFT X TO A 010 DEG HDG. I THEN ASKED ACFT X TO SAY ALT AND HE RPTED LEVELING AT FL380. THE ACFT Y CHKED ON THE FREQ AND SAID THAT THE ACFT X WAS 500 FT ABOVE ON HIS TCASII. THE ACFT X THEN SAID HE SHOWED 800 FT ABOVE THE ACFT Y.
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.