What was found
CREW REPORTED, NR 1 ENGINE FAILED INFLIGHT. N1 STABILIZED AT ABOUT 14 PERCENT AND 100 DEGREES. FAILURE OCCURRED DURING CLIMBOUT IN SHALLOW LEFT BANK WITH CLIMB THRUST SET. PERFORMED AIR RETURN TO NEWARK. LANDED UNEVENTFULLY. MAINTENANCE FOUND UNACCEPTABLE DEBRIS ON INDICATING CHIP DETECTOR, ALSO NOTED RAPID N2 RISE DURING ATTEMPTED START (APPROXIMATELY 50 PERCENT N2 WITHIN 3 SECONDS). SUSPECTED DAMAGE TO ACCESSORY DRIVE UNIT. REMOVED AND REPLACED NR 1 ENGINE IAW EXPRESS JET EMB145 TASKCARD 627001. OPS AND LEAK CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.