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Air carrier Y TCASII RA with VFR small transport X non adherence to ATC clearance. Evasive action taken. See and avoid concept.
| Attributes | |
| ACN | 253266 |
| Time | |
| Date | 199310 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : bae |
| State Reference | WI |
| Altitude | msl bound lower : 7000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mke tower : mlb |
| Operator | general aviation : personal |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | VFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 4 controller non radar : 5 controller radar : 10 |
| ASRS Report | 253266 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : developmental |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : airborne less severe non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Small transport X en route wbound at 6500 MSL. Air carrier Y descending opposite direction to 7000 ft MSL. Traffic issued to both aircraft. Air carrier Y leveled at 7500 ft until passing small transport X, even though air carrier Y had reported small transport X in sight. This is another example of how TCASII erodes the controller's ability to separate VFR and IFR traffic. It also causes the pilots to be continuously second-guessing the controller and adds to frequency congestion. Company regulations are too restrictive in the mandatory compliance of RA's.
Original NASA ASRS Text
Title: ACR Y TCASII RA WITH VFR SMT X NON ADHERENCE TO ATC CLRNC. EVASIVE ACTION TAKEN. SEE AND AVOID CONCEPT.
Narrative: SMT X ENRTE WBOUND AT 6500 MSL. ACR Y DSNDING OPPOSITE DIRECTION TO 7000 FT MSL. TFC ISSUED TO BOTH ACFT. ACR Y LEVELED AT 7500 FT UNTIL PASSING SMT X, EVEN THOUGH ACR Y HAD RPTED SMT X IN SIGHT. THIS IS ANOTHER EXAMPLE OF HOW TCASII ERODES THE CTLR'S ABILITY TO SEPARATE VFR AND IFR TFC. IT ALSO CAUSES THE PLTS TO BE CONTINUOUSLY SECOND-GUESSING THE CTLR AND ADDS TO FREQ CONGESTION. COMPANY REGS ARE TOO RESTRICTIVE IN THE MANDATORY COMPLIANCE OF RA'S.
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.