As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT PASSING FL 260, NR 3 N1 WENT TOWARD ZERO WHILE ACFT EXPERIENCED MODERATE VIBRATION. MOVED THROTTLE TO IDLE EGT & N2 APPEARED NORMAL & WERE SIMILAR TO 1 & 2 ENG, WHEN NR 3 THROTTLE WAS ADVANCED FROM IDLE, MODERATE VIBRATIONS WERE FELT. RAN COMPRESSOR STALL CHECKLIST & SHUTDOWN NR 3 ENG. ENG FAILED BORESCOPE INSPECTION. ENG IS APPROVED FOR REMOVAL BY ENGINEER. R & R NR 3 ENG IAW NR 3 ENG CHANGE WC 71T0101-3. OPERATIONS & LEAK CHECKED GOOD. OK FOR SERVICE.