What was found
EWR - FLT 3572 - EN ROUTE PHL-EWR - CREW REPORTED, LOST NR 1 ENGINE EN ROUTE TO EWR. TORQUE AND NP ON NR 1 WENT TO ZERO. TROUBLESHOT ENGINE, SUSPECTED INTERMITTENT TSU SIGNAL. REMOVED AND REPLACED TSU ON NR 1 SIDE. GROUND CHECK GOOD. REQUESTED TEST FLIGHT. AFTER TEST FLIGHT, ON SHUTDOWN NR 1 TORQUE INCREASED TO OVER 50 PERCENT WHEN CL TO FEATHER DETENT/SCU CIRCUIT BREAKER POPPED. REPAIRED SHORTED WIRING OPS CHECKED GOOD. (M)