What was found
THE LEFT NOSE GEAR DOOR CAME IN CONTACT WITH THE NOSE WHEEL AND BROKE THE LEFT DOOR ACTUATING LEVER ROLLER BEARING AND THE LEFT DOOR. AGUSTA SB B.T. 109-84 REV A PERTAINS TO THIS SUBJECT, BUT DOES NOT APPLY TO THIS AIRCRAFT S/N. THIS AIRCRAFT WAS MODIFIED AT THE FACTORY. THIS REPAIR STATION HAS FOUND 2 OTHER AIRCRAFT (A109C) WITH B.T. 109-84 REV 1 C/W THAT HAVE BROKEN THE LEFT NOSE GEAR DOOR. THE NOSE STRUT PRESSURE ON THIS AIRCRAFT WAS FOUND TO BE 25 PSI LOW. THIS COULD BE THE CAUSE. INSTALLED NEW LEFT NOSE GEAR DOOR AND LEVER. SERVICED NOSE STRUT WITH NITROGEN. PERFORMED RETRACTION/EXTENSION CHECK.