As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF LOUD POP FROM RT ENGINE, N1 ROLLED BACK TO 100%, THEN RECOVERED. ALL ENG INDICATIONS APPEARED NORMAL, BUT AIR RETURNED EWR AS PRECAUTION. PERFORMED TEST 3 IP HP COMPRESSOR AIRFLOW CONTROL TEST IAW M/M 71-00-00-715-049-R03. OPERATIONS CHECKED GOOD.