As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENG NR 2 LP AT AMBER 4.0 HAD TO REDUCE THRUST PER QRH BACK TO NORMAL GREEN AREA. RETURNED TO DEPARTING AIRPORT. DEFERRED PER FMR REF ETN-EJ-72-004. TDMI AUTHORIZATION NUMBER 027T7756. COMPLIED WITH W/C,S EA72-00-00-012 AND EA72-00-00-013 VIBE CK GOOD ON RT ENGINE.