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Altitude deviation altitude excursion in pilot response to TCASII RA on base leg, visual approach procedure.
| Attributes | |
| ACN | 208850 |
| Time | |
| Date | 199204 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : elp |
| State Reference | TX |
| Altitude | msl bound lower : 8000 msl bound upper : 8400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : elp tower : crw |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach descent other |
| Route In Use | approach : visual enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 11000 flight time type : 1000 |
| ASRS Report | 208850 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 900 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
At about PM10 we were on a right base to el paso runway 4 and was told to maintain 8000 ft because of traffic at our 12 O'clock. We saw the traffic which was going from right to left and low, at least 1000 ft below us. We told approach that we saw the traffic and we were given a visual. At this moment our TCASII gave the RA command to fly up and I told approach this and we began a climb. At 8400 ft the RA stopped and I told approach that we could now descend and we did. Although we saw the traffic and it was no problem the TCASII system did not think so.
Original NASA ASRS Text
Title: ALTDEV ALT EXCURSION IN PLT RESPONSE TO TCASII RA ON BASE LEG, VISUAL APCH PROC.
Narrative: AT ABOUT PM10 WE WERE ON A R BASE TO EL PASO RWY 4 AND WAS TOLD TO MAINTAIN 8000 FT BECAUSE OF TFC AT OUR 12 O'CLOCK. WE SAW THE TFC WHICH WAS GOING FROM R TO L AND LOW, AT LEAST 1000 FT BELOW US. WE TOLD APCH THAT WE SAW THE TFC AND WE WERE GIVEN A VISUAL. AT THIS MOMENT OUR TCASII GAVE THE RA COMMAND TO FLY UP AND I TOLD APCH THIS AND WE BEGAN A CLB. AT 8400 FT THE RA STOPPED AND I TOLD APCH THAT WE COULD NOW DSND AND WE DID. ALTHOUGH WE SAW THE TFC AND IT WAS NO PROBLEM THE TCASII SYS DID NOT THINK SO.
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.