Corporate departure from runway 36L at new experienced a near miss from an unobserved and unreported...

Narrative:

The nearmiss event occurred shortly after departing runway 36L at new orleans lakefront (new) at an altitude of approximately 15;00 ft MSL; in a cessna 525B (CJ3). The weather was VMC conditions with unlimited ceilings and flight visibility. The target aircraft was never visually identified in-flight from the cockpit. I was cleared for a 'no delay' takeoff on runway 36L and instructed to climb on runway heading to 2;000 ft. I promptly flew the clearance as instructed until; at approximately 1;500 ft MSL; I received a TCAS ii prompted resolution advisory (RA) to 'climb; climb' immediately followed by a 'maintain vertical speed' of approximately 4;000 FPM. At 2;200 ft MSL; I received a 'clear of conflict' announcement and quickly descended back down to my assigned altitude of 2;000 ft MSL. Almost simultaneously to the initial RA; I was told to contact new orleans approach. As soon as I was able to clear the conflict; I was able to contact and notified new orleans approach of the resolution advisory and informed them that I was leveling off at 2;000 ft MSL. According to the indications of the TCAS; which is overlaid on the pfd; estimated horizontal distance was incalculable or undeterminable and the estimated vertical distance was at or within 400 ft separation of the target aircraft. It is my belief that the target aircraft was cruising or maneuvering at 1;500 MSL off the departure end of 36L. I was cleared for a 'no delay' departure for reasons I am not sure of. After reflecting on the event; I feel confident that I flew the clearance as instructed with no deviations until the RA was received. I then promptly notified ATC of the RA while simultaneously returning to my cleared altitude once the conflict was cleared. Overall; I am not sure what I could have done differently to completely avoid the conflict.

Original NASA ASRS Text

Title: Corporate departure from Runway 36L at NEW experienced a near miss from an unobserved and unreported target shortly after takeoff resulting in a climb above assigned altitude.

Narrative: The nearmiss event occurred shortly after departing Runway 36L at New Orleans Lakefront (NEW) at an altitude of approximately 15;00 FT MSL; in a Cessna 525B (CJ3). The weather was VMC conditions with unlimited ceilings and flight visibility. The target aircraft was never visually identified in-flight from the cockpit. I was cleared for a 'no delay' takeoff on Runway 36L and instructed to climb on runway heading to 2;000 FT. I promptly flew the clearance as instructed until; at approximately 1;500 FT MSL; I received a TCAS II prompted Resolution Advisory (RA) to 'Climb; Climb' immediately followed by a 'Maintain Vertical Speed' of approximately 4;000 FPM. At 2;200 FT MSL; I received a 'clear of conflict' announcement and quickly descended back down to my assigned altitude of 2;000 FT MSL. Almost simultaneously to the initial RA; I was told to contact New Orleans Approach. As soon as I was able to clear the conflict; I was able to contact and notified New Orleans Approach of the Resolution Advisory and informed them that I was leveling off at 2;000 FT MSL. According to the indications of the TCAS; which is overlaid on the PFD; estimated horizontal distance was incalculable or undeterminable and the estimated vertical distance was at or within 400 FT separation of the target aircraft. It is my belief that the target aircraft was cruising or maneuvering at 1;500 MSL off the departure end of 36L. I was cleared for a 'no delay' departure for reasons I am not sure of. After reflecting on the event; I feel confident that I flew the clearance as instructed with no deviations until the RA was received. I then promptly notified ATC of the RA while simultaneously returning to my cleared altitude once the conflict was cleared. Overall; I am not sure what I could have done differently to completely avoid the conflict.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1088009
Time
Date	201305
Local Time Of Day	1201-1800
Place
Locale Reference	NEW.Airport
State Reference	LA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Citationjet (C525/C526) - CJ I / II / III / IV
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	Vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Commercial Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 40 Flight Crew Total 2700 Flight Crew Type 250
Events
Anomaly	ATC Issue All Types Conflict NMAC
Miss Distance	Horizontal 0 Vertical 400

Corporate departure from runway 36L at new experienced a near miss from an unobserved and unreported target shortly after takeoff resulting in a climb above assigned altitude.