What was found
THE FSECU HAS A RELIABILITY PROBLEM. HERE IS THE FAULT HISTORY BELOW; SERVICE TIME ON S/N 131 IS 6.1 HOURS. SERVICE TIME ON S/N 149 IS 0.8 HOURS. SERVICE TIME ON S/N 140 IS 328.2 HOURS. SERVICE TIME ON S/N 107 IS 605.4 HOURS. SERVICE TIME ON S/N 317 IS 38.9 HOURS. VERY LOW TIME ON THESE UNITS THAT FAILED. THE FLIGHT CONTROL SYSTEM IMPROVEMENTS HISTORY AS NOTED HEREIN AFTER; CHANGE THE P/N OF SLAT FLEXIBLE SHAFT NR 1 FROM V25W513320-001 OR V25W513330-001 TO V25W513330-201. CHANGE THE P/N OF SLAT PDU FROM V25W513310-001 OR V25W513310-003 TO V25W513310-003 MOD AB.