As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF PASSING 3K FEET THE AFT RIGHT LAV SMOKE DETECTOR ACTIVATED. NO OTHER SIGN OF SMOKE OR FIRE DETECTED FROM CABIN CREW. CKD APU INLET, NTF. BOROSCOPED NR 1 ENGINE, FOUND EVIDENCE OF OIL LEAKING NR 3 SEAL AREA. REPLACED NR 1 ENGINE PER ROUTINE CARD DECK TRANS.