As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROTATION THE RT ENGINE WAS IMPACTED WITH A BIRD. ALL ENGINE PARAMETERS WENT DOWN TO IDLE AND RETURNED SLOWLY TO NORMAL PARAMETERS IAW AMM 05-51-08 PAGE 601 BIRD STRIKE CONDITION. CHECK WAS ACCOMPLISHED AND NOT FOUND DAMAGE IN THE ENGINE AREAS.