Narrative:

While climbing on the jacal 4 departure off Runway18C there is an area after intersection zarso and before intersection tarbt where the aircraft arriving on the adena 2 are placed in a position of head on paths separated by 1000 feet with departing aircraft on the jacal 4. On the climb out; 3500FPM is not uncommon and if it is timed just right you can get a TA followed by an RA of 'monitor vertical speed' due to the closure rate and leading to the close proximity to one another. With time and experience; pilots can see this coming and can reduce the RA factor of this area but not always the TA conflict that is inherent with the design of these arrivals and departures. The first officer had reduced power and vertical speed below the RA advisory by the time the RA went off. Monitor vertical speed was enunciated with the greater than 500FPM on the vertical speed indicating red. We advised ATC and they asked about evasive maneuvers or other action that we may need to resolve our RA and we explained that we were already compliant with the RA by the time the RA had gone off.

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Original NASA ASRS Text

Title: Air carrier departure from CLT on the JACAL 4 SID; adjusted climb rate just prior to an expected TCAS TA/RA; reporter suggesting two possible preventive measures to decrease the number of TCAS alerts on this SID; additional pilot training and revised ATC procedures to increase the minimal separation that currently exists.

Narrative: While climbing on the JACAL 4 departure off Runway18C there is an area after intersection ZARSO and before intersection TARBT where the aircraft arriving on the ADENA 2 are placed in a position of head on paths separated by 1000 feet with departing aircraft on the JACAL 4. On the climb out; 3500FPM is not uncommon and if it is timed just right you can get a TA followed by an RA of 'monitor vertical speed' due to the closure rate and leading to the close proximity to one another. With time and experience; pilots can see this coming and can reduce the RA factor of this area but not always the TA conflict that is inherent with the design of these arrivals and departures. The First Officer had reduced power and vertical speed below the RA advisory by the time the RA went off. Monitor vertical speed was enunciated with the greater than 500FPM on the vertical speed indicating red. We advised ATC and they asked about evasive maneuvers or other action that we may need to resolve our RA and we explained that we were already compliant with the RA by the time the RA had gone off.

Data retrieved from NASA's ASRS site as of April 2012 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.