What was found
PRECAUTIONARY SHUTDOWN OF NR 1 ENGINE AFTER 25 MINUTES INTO FLIGHT. ENGINE COMPRESSOR STALLED FOLLOWED BY OIL TEMPERATURE 140 DEGREES CELSIUS AND CLIMBING. RETURNED TO MIAMI WITHOUT INCIDENT. CHECKED GEARBOX OIL SCREEN, ALL PNEUMATIC DUCTS AND ANTI-ICE VALVES. ALL FOUND OK. TOOK OK SAMPLES, VISUAL CHECK OK. PULLED MAIN OIL SCREEN, FOUND OK. REMOVED AND REPLACED TEMP BULB AND CANNON PLUG. IDLE RUN OK. HIGH POWER RUN OK. COULD NOT DUPLICATE COMPRESSOR STALL. (M)