Narrative:

Amass (airport movement area safety system) was set in limited mode due to approaching thunderstorms; rendering the equipment ineffective. This was done at the direction of the watch supervisor. Corrective action: 1) increase ground delay programs to lga in order to provide increased spacing on final and keep amass in operational mode. 2) install asde-X system which can be reliably used during inclement WX.

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Original NASA ASRS Text

Title: LGA CTLR EXPRESSED CONCERNS REGARDING AMASS LIMITATION(S) AND SUPVR'S DECISION TO OPERATE AMASS IN LIMITED MODE.

Narrative: AMASS (ARPT MOVEMENT AREA SAFETY SYS) WAS SET IN LIMITED MODE DUE TO APCHING TSTMS; RENDERING THE EQUIP INEFFECTIVE. THIS WAS DONE AT THE DIRECTION OF THE WATCH SUPVR. CORRECTIVE ACTION: 1) INCREASE GND DELAY PROGRAMS TO LGA IN ORDER TO PROVIDE INCREASED SPACING ON FINAL AND KEEP AMASS IN OPERATIONAL MODE. 2) INSTALL ASDE-X SYS WHICH CAN BE RELIABLY USED DURING INCLEMENT WX.

Data retrieved from NASA's ASRS site as of January 2009 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.