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Air carrier medium large transport altitude deviation excursion from clearance altitude in response to TCASII RA.
| Attributes | |
| ACN | 182890 |
| Time | |
| Date | 199107 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : stl |
| State Reference | MO |
| Altitude | msl bound lower : 4100 msl bound upper : 4500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : stl |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other descent other |
| Route In Use | approach : visual enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 3100 flight time type : 300 |
| ASRS Report | 182890 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time type : 2500 |
| ASRS Report | 183191 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Altitude deviation in response to TCAS RA. On vectors for visibility approach runway 30L stl. Assigned altitude 4500'. In descent to 4500' received TCAS TA, followed by ATC advisory of traffic on final at 11 O'clock, 4500'. Visibility contact followed, then RA. Complied with RA (approximately 1500' descent) and went through assigned altitude by 300-400'. Started climb back to altitude and received clearance for visibility approach 30L following the traffic. Traffic was never closer than 2 mi. We were on downwind and traffic was on visibility final. Clearance for visibility approach came shortly after altitude deviation. High level of radio traffic. ATC did not note altitude deviation.
Original NASA ASRS Text
Title: ACR MLG ALT DEVIATION EXCURSION FROM CLRNC ALT IN RESPONSE TO TCASII RA.
Narrative: ALT DEVIATION IN RESPONSE TO TCAS RA. ON VECTORS FOR VIS APCH RWY 30L STL. ASSIGNED ALT 4500'. IN DSNT TO 4500' RECEIVED TCAS TA, FOLLOWED BY ATC ADVISORY OF TFC ON FINAL AT 11 O'CLOCK, 4500'. VIS CONTACT FOLLOWED, THEN RA. COMPLIED WITH RA (APPROX 1500' DSNT) AND WENT THROUGH ASSIGNED ALT BY 300-400'. STARTED CLB BACK TO ALT AND RECEIVED CLRNC FOR VIS APCH 30L FOLLOWING THE TFC. TFC WAS NEVER CLOSER THAN 2 MI. WE WERE ON DOWNWIND AND TFC WAS ON VIS FINAL. CLRNC FOR VIS APCH CAME SHORTLY AFTER ALT DEVIATION. HIGH LEVEL OF RADIO TFC. ATC DID NOT NOTE ALT DEVIATION.
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.