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B737-800 flight crew climbed in response to a TCASII RA while level at a descent intermediate altitude due to being off normal arrival course for WX avoidance.
| Attributes | |
| ACN | 519356 |
| Time | |
| Date | 200107 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : atl.vortac |
| State Reference | GA |
| Altitude | msl bound lower : 14000 msl bound upper : 14600 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Thunderstorm |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival : on vectors |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 220 flight time total : 15000 flight time type : 2000 |
| ASRS Report | 519356 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 10000 flight time type : 260 |
| ASRS Report | 519749 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe inflight encounter : weather other anomaly other |
| Independent Detector | aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance controller : separated traffic flight crew : took precautionary avoidance action flight crew : took evasive action |
| Miss Distance | horizontal : 6000 vertical : 700 |
| Supplementary | |
| Problem Areas | Weather ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Inter Facility Coordination Failure |
Narrative:
On arrival to atl, la grange STAR, deviating south of cse for WX, level at 14000 ft, no speed restr. Speed was 300 KTS. Center gave clearance direct atl when able. Called center inside tiroe (29 DME) to let them know we were correcting back to inbound radial. Center hastily handed us off to approach. Before we could check in (approach was giving a turn and descent to other aircraft), we got an RA and climb command. We climbed to approximately 14600 ft. Approach told other aircraft to expedite descent. They later gave us speed reduction, turn and then descent. I believe problem was late handoff from center, aircraft deviating, and not in perfect trail alignment and difference in speeds.
Original NASA ASRS Text
Title: B737-800 FLC CLBED IN RESPONSE TO A TCASII RA WHILE LEVEL AT A DSCNT INTERMEDIATE ALT DUE TO BEING OFF NORMAL ARR COURSE FOR WX AVOIDANCE.
Narrative: ON ARR TO ATL, LA GRANGE STAR, DEVIATING S OF CSE FOR WX, LEVEL AT 14000 FT, NO SPD RESTR. SPD WAS 300 KTS. CTR GAVE CLRNC DIRECT ATL WHEN ABLE. CALLED CTR INSIDE TIROE (29 DME) TO LET THEM KNOW WE WERE CORRECTING BACK TO INBOUND RADIAL. CTR HASTILY HANDED US OFF TO APCH. BEFORE WE COULD CHK IN (APCH WAS GIVING A TURN AND DSCNT TO OTHER ACFT), WE GOT AN RA AND CLB COMMAND. WE CLBED TO APPROX 14600 FT. APCH TOLD OTHER ACFT TO EXPEDITE DSCNT. THEY LATER GAVE US SPD REDUCTION, TURN AND THEN DSCNT. I BELIEVE PROB WAS LATE HDOF FROM CTR, ACFT DEVIATING, AND NOT IN PERFECT TRAIL ALIGNMENT AND DIFFERENCE IN SPDS.
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.