As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#296, JFK-SKB. (AIRCRAFT PERFORMED AN AIR TURN BACK TO JFK) 'AIR ENG BLEED ABNORMAL RAN ALL CK LOSTS AND CONTACTED MX -ADV AIR RETURN JFK; REMOVED AND REPLACED #1 ENG 10HA1 IAW AMM 36-11-43, RAN ENG #1 OPS CHECK NO GOOD. FUTHER T/S REQ.' (SUPPLEMENTAL TO FOLLOW)