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Reporter contends that air carrier X was separated from small aircraft Y, but a TCASII RA caused the flight crew to climb and turn overflying small aircraft Y by 500 ft. Reporter stated that he was surprised at air carrier X's maneuver.
| Attributes | |
| ACN | 344155 |
| Time | |
| Date | 199608 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lft |
| State Reference | LA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lft |
| Operator | common carrier : air carrier |
| Make Model Name | ATR 42 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 15 |
| ASRS Report | 344155 |
| Person 2 | |
| Affiliation | government : faa |
| Function | oversight : supervisor |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : far non adherence : clearance non adherence other other anomaly other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The ATR42 would have passed south of the cessna and not have been a factor but the TCASII alarm caused the ATR42 pilot to turn and climb and pass over the cessna 500 ft at time of targets merging. Had the ATR42 not turned, the targets would not have merged.
Original NASA ASRS Text
Title: RPTR CONTENDS THAT ACR X WAS SEPARATED FROM SMA Y, BUT A TCASII RA CAUSED THE FLC TO CLB AND TURN OVERFLYING SMA Y BY 500 FT. RPTR STATED THAT HE WAS SURPRISED AT ACR X'S MANEUVER.
Narrative: THE ATR42 WOULD HAVE PASSED S OF THE CESSNA AND NOT HAVE BEEN A FACTOR BUT THE TCASII ALARM CAUSED THE ATR42 PLT TO TURN AND CLB AND PASS OVER THE CESSNA 500 FT AT TIME OF TARGETS MERGING. HAD THE ATR42 NOT TURNED, THE TARGETS WOULD NOT HAVE MERGED.
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.