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Flight crew of an medium large transport climbed and then subsequently descended from assigned altitude in response to TCASII RA's.
| Attributes | |
| ACN | 323155 |
| Time | |
| Date | 199512 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 2600 msl bound upper : 3400 |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker 100 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 323155 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | unspecified : 3000 vertical : 600 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Altitude deviation due to TCASII. Numerous TCASII alerts upon arrival at dfw runway 17L. The first commanded a climb which we responded to. ATC was partially blocked by TCASII. Then ATC assigned a heading of 180 degrees. Soon after another RA from TCASII occurred commanding a descent. Following the TCASII caused an altitude deviation of about 400 ft. Once clear of conflict a return to 3000 ft was accomplished followed by a normal landing at dfw.
Original NASA ASRS Text
Title: FLC OF AN MLG CLBED AND THEN SUBSEQUENTLY DSNDED FROM ASSIGNED ALT IN RESPONSE TO TCASII RA'S.
Narrative: ALTDEV DUE TO TCASII. NUMEROUS TCASII ALERTS UPON ARR AT DFW RWY 17L. THE FIRST COMMANDED A CLB WHICH WE RESPONDED TO. ATC WAS PARTIALLY BLOCKED BY TCASII. THEN ATC ASSIGNED A HDG OF 180 DEGS. SOON AFTER ANOTHER RA FROM TCASII OCCURRED COMMANDING A DSCNT. FOLLOWING THE TCASII CAUSED AN ALTDEV OF ABOUT 400 FT. ONCE CLR OF CONFLICT A RETURN TO 3000 FT WAS ACCOMPLISHED FOLLOWED BY A NORMAL LNDG AT DFW.
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.