What was found
PHL - FLT 1425 - AFTER T/O PHL DURING INITIAL CLIMB, NR 1 ENG EXPERIENCED UNCONTAINED FAILURE RESULTING IN DAMAGE TO LT CORE COWL AND LT AILERON. ACCOMP PROCEDURES AND SHUTDOWN NR 1 ENG. A/C RETURNED TO PHL AND LANDED W/O INCIDENT. REPLACED NR 1 ENG AND LT CORE COWL. ACCOMP LEAK CHECKS AND GROUND ENG RUN WITH NO DEFECTS FOUND. ACCOMP INTERIM REPAIR TO LT AILERON AND A/C MX FERRY PHL/JFK. REPLACED LT AILERON AT JFK. FOUND 1.6 INCH SECTION OF T49 THERMOCOUPLE PROBE MISSING FROM THE 12:00 O'CLOCK PROBE. MISSING SECTION OF PROBE IMPACTED THE LPT STAGE 1 BLADES CAUSING A SUBSEQUENT STAGE 1 BLADE SEPARATION. 10X VISUAL INSPECT OF ALL PROBES HAS BEEN IMPLEMENTED. ENG REPAIRED AND RETURNED TO SERVICE. (M)