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An air carrier SF34 responded to a TCASII RA and descended 500 ft to avoid a VFR BE35 at 11500 ft. ARTCC advised approach control after the fact that traffic had been given and that the SF34 was responding to the RA.
| Attributes | |
| ACN | 340710 |
| Time | |
| Date | 199607 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : roc |
| State Reference | NY |
| Altitude | msl bound lower : 10500 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : roc tower : lga |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other descent other |
| Route In Use | enroute airway : zob |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Bonanza 35 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 8 controller non radar : 8 controller radar : 8 |
| ASRS Report | 340710 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 200 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
I was working approach at roc when air carrier X reported in after being handed off from center. Air crew reported responding to an RA from a TCASII alert issued from onboard equipment. The other aircraft was at 11500 ft, BE35 eastbound. The air carrier X SF34 was the type of aircraft responding and was supposed to level at 11000 ft, however descended about 500 ft below that without clearance. No mid-air was declared or suggested. Pilot of SF34 reported what the aircraft looked like and no further action taken. Center had issued traffic and verbally coordinated the deviation from assigned altitude after the aircraft reported on.
Original NASA ASRS Text
Title: AN ACR SF34 RESPONDED TO A TCASII RA AND DSNDED 500 FT TO AVOID A VFR BE35 AT 11500 FT. ARTCC ADVISED APCH CTL AFTER THE FACT THAT TFC HAD BEEN GIVEN AND THAT THE SF34 WAS RESPONDING TO THE RA.
Narrative: I WAS WORKING APCH AT ROC WHEN ACR X RPTED IN AFTER BEING HANDED OFF FROM CTR. AIR CREW RPTED RESPONDING TO AN RA FROM A TCASII ALERT ISSUED FROM ONBOARD EQUIP. THE OTHER ACFT WAS AT 11500 FT, BE35 EBOUND. THE ACR X SF34 WAS THE TYPE OF ACFT RESPONDING AND WAS SUPPOSED TO LEVEL AT 11000 FT, HOWEVER DSNDED ABOUT 500 FT BELOW THAT WITHOUT CLRNC. NO MID-AIR WAS DECLARED OR SUGGESTED. PLT OF SF34 RPTED WHAT THE ACFT LOOKED LIKE AND NO FURTHER ACTION TAKEN. CTR HAD ISSUED TFC AND VERBALLY COORDINATED THE DEV FROM ASSIGNED ALT AFTER THE ACFT RPTED ON.
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.