As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4153 - CREW REPORTED NR 1 ENGINE LOW PRESSURE INDICATION WARNING. CREW SHUT DOWN ENGINE ACCORDING TO CHECKLIST. AIRCRAFT RETURNED TO ATL AND LANDED SAFELY. MAINTENANCE FOUND PSV MOUNTING ADAPTER TUBE O-RING BROKEN. MAINTENANCE REPLACED RING. OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE. (M)