Narrative:

I was working as the local controller at the la guardia ATCT in flushing, ny. The runway confign at the time was departing runway 13, landing runway 22 on the 'whitestone climb'. I departed air carrier X off runway 13 and waited as the aircraft reached a distance of 3.5 DME and an altitude of 3000 ft. At that time, I departed cpr Y off runway 13 also on a 'whitestone climb'. As cpr Y reached the departure end of the runway, I switched the aircraft to departure control. A few moments later, I noticed that cpr Y had outclbed and turned inside air carrier X the incident was classified as a system error. I had made it a point in my operation to provide more than adequate IFR separation for the departure controller. By the way, this was the second incident in 2 weeks concerning this departure procedure. We, the controllers and the union, have complained to management on numerous occasions about the potential for disaster with the 'whitestone climb' off lga, and every time it had fallen on deaf ears with management, and we take the heat for the outcome. We have a very serious problem existing here, and if nothing is done soon, the potential exists for a major aviation disaster to take place. If nothing is done and an accident does happen due to this operation, the FAA will 'buy the whole farm' because they were fully informed and prewarned. Callback conversation with reporter revealed the following information: reporter experience 4 yrs non radar. Separation loss 1.5 mi and 600 ft. The reporter stated he provided initial separation when the aircraft were turned over to departure control. Loss of separation occurred 2 mins after communication change to departure. The SID has been changed. FAA management determined this was a procedure error.

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Original NASA ASRS Text

Title: ACR X HAD LTSS FROM CPR Y. SYS ERROR.

Narrative: I WAS WORKING AS THE LCL CTLR AT THE LA GUARDIA ATCT IN FLUSHING, NY. THE RWY CONFIGN AT THE TIME WAS DEPARTING RWY 13, LNDG RWY 22 ON THE 'WHITESTONE CLB'. I DEPARTED ACR X OFF RWY 13 AND WAITED AS THE ACFT REACHED A DISTANCE OF 3.5 DME AND AN ALT OF 3000 FT. AT THAT TIME, I DEPARTED CPR Y OFF RWY 13 ALSO ON A 'WHITESTONE CLB'. AS CPR Y REACHED THE DEP END OF THE RWY, I SWITCHED THE ACFT TO DEP CTL. A FEW MOMENTS LATER, I NOTICED THAT CPR Y HAD OUTCLBED AND TURNED INSIDE ACR X THE INCIDENT WAS CLASSIFIED AS A SYS ERROR. I HAD MADE IT A POINT IN MY OPERATION TO PROVIDE MORE THAN ADEQUATE IFR SEPARATION FOR THE DEP CTLR. BY THE WAY, THIS WAS THE SECOND INCIDENT IN 2 WKS CONCERNING THIS DEP PROC. WE, THE CTLRS AND THE UNION, HAVE COMPLAINED TO MGMNT ON NUMEROUS OCCASIONS ABOUT THE POTENTIAL FOR DISASTER WITH THE 'WHITESTONE CLB' OFF LGA, AND EVERY TIME IT HAD FALLEN ON DEAF EARS WITH MGMNT, AND WE TAKE THE HEAT FOR THE OUTCOME. WE HAVE A VERY SERIOUS PROBLEM EXISTING HERE, AND IF NOTHING IS DONE SOON, THE POTENTIAL EXISTS FOR A MAJOR AVIATION DISASTER TO TAKE PLACE. IF NOTHING IS DONE AND AN ACCIDENT DOES HAPPEN DUE TO THIS OPERATION, THE FAA WILL 'BUY THE WHOLE FARM' BECAUSE THEY WERE FULLY INFORMED AND PREWARNED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFORMATION: RPTR EXPERIENCE 4 YRS NON RADAR. SEPARATION LOSS 1.5 MI AND 600 FT. THE RPTR STATED HE PROVIDED INITIAL SEPARATION WHEN THE ACFT WERE TURNED OVER TO DEP CTL. LOSS OF SEPARATION OCCURRED 2 MINS AFTER COM CHANGE TO DEP. THE SID HAS BEEN CHANGED. FAA MGMNT DETERMINED THIS WAS A PROC ERROR.

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.