What was found
THE FOLLOWING DETAILS WERE REPORTED BY THE PILOT. THEY OCCURRED WHILE EN ROUTE. A/C YAWED TO LEFT. NR 1 TQ INDICATOR SPOOLED DOWN RAPIDLY. CHIP DET LT LIGHT ILLUMINATED ON WARNING ANNUNCIATOR PANEL. NR 1 RPM INDICATOR SPOOLED DOWN. NR 1 OIL PRESSURE, FUEL FLOW, AND EGT SPOOLED DOWN. AIR SPEED REDUCED FROM 160 KIAS TO 125. AT THE TIME OF THE INCIDENT, ENGINE TSN: 8028.6; TSO: 3410.0; CYCLES: 3177. THERE WERE 208.7 HOURS SINCE THE LAST HSI AND G/B INSP. PRIMARY FOCUS IS ON THE GEARBOX; HOWEVER, TEAR DOWN HAS NOT OCCURRED.