AN MBB-BK117 A4 HELI WAS GNDED WHEN IT WAS DISCOVERED #1 ENG FLOW FENCE ACTUATOR HAD EXCEEDED REPLACEMENT TIME LIMIT BY 60 HRS.

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AFTER LNDG AT XYZ HOSPITAL IN ZZZ FOR A PATIENT TRANSPORT; I WAS NOTIFIED BY THE LEAD MECH VIA CELL PHONE THAT WE HAD OVERFLOWN A COMPONENT ON THE #1 ENG AND THE HELI WAS OTS FOR MAINT. I NOTIFIED NURSING STAFF AND COORD THE SECOND ACFT TO TRANSPORT THE PATIENT. THE COMPONENT; THE #1 ENG FLOW FENCE ACTUATOR; HAD BEEN OVERFLOWN BY OVER 60 HRS. CONTRIBUTING FACTORS FOR THIS INCIDENT INCLUDE: 1) FAILURE OF THE PLTS AND MECHS TO VERIFY THE TOTAL TIME FOR THE TOTAL ENG TIME VERSUS THE COMPONENT CHANGE TIME. 2) FAILURE OF THE COMPANY TO PROVIDE TIMELY MAINT STATUS RECORDS. 3) ASSUMPTIONS THAT THE MOST CURRENT AND TIMELY COMPONENTS ARE TRACKED BY THE COMPANY RECORDS SECTION AND CONTRACT SITES WILL BE NOTIFIED IF A COMPONENT IS DUE TO BE CHANGED. 4) ASSUMPTION BY THE PLTS THAT THE MECHS ARE KEEPING TRACK OF ALL COMPONENT CHANGE TIMES AND VICE VERSA. 5) A RECENT CHANGE OF THE COMPANY RECORD KEEPING POLICIES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE CAUSE OF THE OVERFLY IS THE FLT CREW'S AND TECHNICIAN'S FAILURE TO MONITOR ENG TOTAL TIME AND CHK WITH COMPONENT CHANGE TIME. THE FUNCTION OF THE FLOW FENCE IS CTL AND LIMIT THE AIR AND FUEL FEED TO THE ENG.