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Air carrier Y unauthorized climb through assigned altitude had less than standard separation from air carrier X TCASII TA RA. Altitude deviation.
| Attributes | |
| ACN | 298276 |
| Time | |
| Date | 199503 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sat |
| State Reference | TX |
| Altitude | msl bound lower : 5000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sat |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Merlin III |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 298276 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : required legal separation non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 5000 vertical : 100 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Air carrier X right downwind ILS 3 sat lvl 6000 ft IFR. ATC issued normal TA on (merlin) Y climbing to 5000 ft. We noticed a Y on TCASII change white to yellow as it continued climb through 5000 ft we were about to query ATC when we received TCASII RA to descend. In accordance with RA we descended out of RA and notified ATC. We were slow to believe initial RA because the picture it presented appeared we would descend onto climbing aircraft. However, after a matter of seconds we chose to believe the RA and descended.
Original NASA ASRS Text
Title: ACR Y UNAUTH CLB THROUGH ASSIGNED ALT HAD LTSS FROM ACR X TCASII TA RA. ALTDEV.
Narrative: ACR X R DOWNWIND ILS 3 SAT LVL 6000 FT IFR. ATC ISSUED NORMAL TA ON (MERLIN) Y CLBING TO 5000 FT. WE NOTICED A Y ON TCASII CHANGE WHITE TO YELLOW AS IT CONTINUED CLB THROUGH 5000 FT WE WERE ABOUT TO QUERY ATC WHEN WE RECEIVED TCASII RA TO DSND. IN ACCORDANCE WITH RA WE DSNDED OUT OF RA AND NOTIFIED ATC. WE WERE SLOW TO BELIEVE INITIAL RA BECAUSE THE PICTURE IT PRESENTED APPEARED WE WOULD DSND ONTO CLBING ACFT. HOWEVER, AFTER A MATTER OF SECONDS WE CHOSE TO BELIEVE THE RA AND DSNDED.
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.