What was found
A NEW 1.25 LB EXTINGUISHER MODEL 344, SN W-968052 CLASSIFICATION 2-B; C WAS INSTALLED IN THE AIRCRAFT ON MARCH 6, 2006. IT WAS REMOVED OVERNIGHT AND REINSTALLED AT 8:50 AM ON MARCH 7, 2006. AS THE HELICOPTER WAS STARTING, THE END EXPLODED OUT OF THE EXTINGUISHER, FIRING IT INTO THE CONSOLE. THE TEMPERATURE IN THE COCKPIT WAS APPROXIMATELY 36 DEGREES C AND THE EXTINGUISHER WAS IN THE SHADE. THE PRESSURE GAUGE WAS IN THE GREEN WHEN INSTALLED. (K)