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B727 flight crew responds to TCASII RA and ATC alert to avoid collision with small aircraft that was climbing above its assigned altitude.
| Attributes | |
| ACN | 622462 |
| Time | |
| Date | 200406 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : tys.airport |
| State Reference | TN |
| Altitude | msl single value : 5000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : tys.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach descent : intermediate altitude |
| Route In Use | approach : traffic pattern |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : tys.tracon |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 250 flight time total : 5000 flight time type : 400 |
| ASRS Report | 622462 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | observation : passenger |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : nmac non adherence : clearance non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb other other : 4 |
| Resolutory Action | controller : issued alert |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 150 vertical : 150 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On downwind for runway 23R, we received a TCASII alert for an approaching GA aircraft that was climbing through 4000 ft. ATC told him to maintain 4000 ft, but he continued his climb. We received a TA, followed by an RA, instructing us to climb. ATC also told us to climb from 5000 ft to 6000 ft immediately. The jumpseater on our aircraft saw the conflicting aircraft. He estimated the GA aircraft came within 150 ft of hitting us. Our TCASII and the quick reaction of the controller saved the day by preventing a midair collision. The pilot and the GA aircraft were told to call knoxville approach after landing to discuss a possible altitude deviation. This was a very close call that could have been prevented by the GA pilot complying with the ATC controller's instructions.
Original NASA ASRS Text
Title: B727 FLT CREW RESPONDS TO TCASII RA AND ATC ALERT TO AVOID COLLISION WITH SMA THAT WAS CLBING ABOVE ITS ASSIGNED ALT.
Narrative: ON DOWNWIND FOR RWY 23R, WE RECEIVED A TCASII ALERT FOR AN APCHING GA ACFT THAT WAS CLBING THROUGH 4000 FT. ATC TOLD HIM TO MAINTAIN 4000 FT, BUT HE CONTINUED HIS CLB. WE RECEIVED A TA, FOLLOWED BY AN RA, INSTRUCTING US TO CLB. ATC ALSO TOLD US TO CLB FROM 5000 FT TO 6000 FT IMMEDIATELY. THE JUMPSEATER ON OUR ACFT SAW THE CONFLICTING ACFT. HE ESTIMATED THE GA ACFT CAME WITHIN 150 FT OF HITTING US. OUR TCASII AND THE QUICK REACTION OF THE CTLR SAVED THE DAY BY PREVENTING A MIDAIR COLLISION. THE PLT AND THE GA ACFT WERE TOLD TO CALL KNOXVILLE APCH AFTER LNDG TO DISCUSS A POSSIBLE ALTDEV. THIS WAS A VERY CLOSE CALL THAT COULD HAVE BEEN PREVENTED BY THE GA PLT COMPLYING WITH THE ATC CTLR'S INSTRUCTIONS.
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.