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Y90 controller experienced operational error when issuing wrong frequency to conflicting aircraft; hindering any possible corrective action.
| Attributes | |
| ACN | 665608 |
| Time | |
| Date | 200507 |
| Place | |
| Locale Reference | navaid : hfd.vor |
| State Reference | CT |
| Altitude | msl single value : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : y90.tracon |
| Operator | general aviation : personal |
| Make Model Name | Gulfstream IV |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : y90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Saab-Scania 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 controller : approach controller : departure |
| Qualification | controller : radar |
| ASRS Report | 665608 |
| Person 2 | |
| Affiliation | other |
| 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 new clearance flight crew : took evasive action |
| Miss Distance | horizontal : 12600 vertical : 400 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
G4 departed runway 24 at bdl flight planned over orw. After clearing other traffic; he was turned towards first departure fix (orw) and switched to ZBW. ZBW had changed (temporarily) frequency and aircraft was 'gone;' level at 10000 ft. SF34 aircraft coming out of pvd's airspace en route to lga; level at 10000 ft was also switched to wrong frequency was unavailable for turns/descent. We saw problem occurring but couldn't do anything about it until G4 came back to my frequency. I immediately turned him and climbed but at about 560 KT closure rate; separation was lost.
Original NASA ASRS Text
Title: Y90 CTLR EXPERIENCED OPERROR WHEN ISSUING WRONG FREQ TO CONFLICTING ACFT; HINDERING ANY POSSIBLE CORRECTIVE ACTION.
Narrative: G4 DEPARTED RWY 24 AT BDL FLT PLANNED OVER ORW. AFTER CLRING OTHER TFC; HE WAS TURNED TOWARDS FIRST DEP FIX (ORW) AND SWITCHED TO ZBW. ZBW HAD CHANGED (TEMPORARILY) FREQ AND ACFT WAS 'GONE;' LEVEL AT 10000 FT. SF34 ACFT COMING OUT OF PVD'S AIRSPACE ENRTE TO LGA; LEVEL AT 10000 FT WAS ALSO SWITCHED TO WRONG FREQ WAS UNAVAILABLE FOR TURNS/DSCNT. WE SAW PROB OCCURRING BUT COULDN'T DO ANYTHING ABOUT IT UNTIL G4 CAME BACK TO MY FREQ. I IMMEDIATELY TURNED HIM AND CLBED BUT AT ABOUT 560 KT CLOSURE RATE; SEPARATION WAS LOST.
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.