Narrative:

Lga was down to one runway for departures and lndgs (runway 13/31 was closed). WX was 'severe clear,' cavu. First officer got the ATIS while I was off the aircraft. The ATIS said to use the ILS hold short line for runway 4, not the 'B4' line, which is usually used. I did not get this information from my first officer. I pulled up to the 'normal' hold short line, assuming since the WX was clear that the ILS hold line was not in use. My first officer then noticed our mistake, while lga tower asked us where we were holding short. We told him that we were over the ILS hold line but he assured us that there was 'no problem.' I was short of the runway, however. Causes: 1) poor CRM -- information communicated. 2) assume -- I assumed since the WX was good that the ILS hold line was not in use. Corrective action: 1) never assume anything! 2) work on a better exchange of information (CRM).

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Original NASA ASRS Text

Title: SF340 FLC CROSSED ILS HOLD SHORT LINE AT LGA.

Narrative: LGA WAS DOWN TO ONE RWY FOR DEPS AND LNDGS (RWY 13/31 WAS CLOSED). WX WAS 'SEVERE CLR,' CAVU. FO GOT THE ATIS WHILE I WAS OFF THE ACFT. THE ATIS SAID TO USE THE ILS HOLD SHORT LINE FOR RWY 4, NOT THE 'B4' LINE, WHICH IS USUALLY USED. I DID NOT GET THIS INFO FROM MY FO. I PULLED UP TO THE 'NORMAL' HOLD SHORT LINE, ASSUMING SINCE THE WX WAS CLR THAT THE ILS HOLD LINE WAS NOT IN USE. MY FO THEN NOTICED OUR MISTAKE, WHILE LGA TWR ASKED US WHERE WE WERE HOLDING SHORT. WE TOLD HIM THAT WE WERE OVER THE ILS HOLD LINE BUT HE ASSURED US THAT THERE WAS 'NO PROB.' I WAS SHORT OF THE RWY, HOWEVER. CAUSES: 1) POOR CRM -- INFO COMMUNICATED. 2) ASSUME -- I ASSUMED SINCE THE WX WAS GOOD THAT THE ILS HOLD LINE WAS NOT IN USE. CORRECTIVE ACTION: 1) NEVER ASSUME ANYTHING! 2) WORK ON A BETTER EXCHANGE OF INFO (CRM).

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.