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Air carrier has altitude deviation on descent due poor level off. TCASII RA.
| Attributes | |
| ACN | 203139 |
| Time | |
| Date | 199203 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sba |
| State Reference | CA |
| Altitude | msl bound lower : 7700 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Retractable Gear |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 250 flight time total : 4500 flight time type : 1500 |
| ASRS Report | 203139 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : required legal separation non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 1000 vertical : 700 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During vectored descent for ILS 07 at santa barbara, ca, center cleared my flight medium large transport to 'descend to 8000 ft, traffic at 12 O'clock opposite direction 7000 ft.' level off was initiated to level at 8000, but due to the thunderstorm and turbulence, aircraft settled to 7750 ft MSL. While climbing back to 8000 ft MSL, TCASII sounded a RA to 'climb'. As the other aircraft passed behind us. Other aircraft (small aircraft) was in visual contact at all times from 12 O'clock 2 mi, until passing behind and left of us. No evasive action was needed or taken. The total time our aircraft was below 8000 ft MSL was less than 30 seconds.
Original NASA ASRS Text
Title: ACR HAS ALTDEV ON DSCNT DUE POOR LEVEL OFF. TCASII RA.
Narrative: DURING VECTORED DSCNT FOR ILS 07 AT SANTA BARBARA, CA, CTR CLRED MY FLT MLG TO 'DSND TO 8000 FT, TFC AT 12 O'CLOCK OPPOSITE DIRECTION 7000 FT.' LEVEL OFF WAS INITIATED TO LEVEL AT 8000, BUT DUE TO THE TSTM AND TURB, ACFT SETTLED TO 7750 FT MSL. WHILE CLBING BACK TO 8000 FT MSL, TCASII SOUNDED A RA TO 'CLB'. AS THE OTHER ACFT PASSED BEHIND US. OTHER ACFT (SMA) WAS IN VISUAL CONTACT AT ALL TIMES FROM 12 O'CLOCK 2 MI, UNTIL PASSING BEHIND AND L OF US. NO EVASIVE ACTION WAS NEEDED OR TAKEN. THE TOTAL TIME OUR ACFT WAS BELOW 8000 FT MSL WAS LESS THAN 30 SECONDS.
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.