As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 387, BOS-BOS. (ETOPS) AIR L WING LEAK ECAM APPROXIMATELY 8 MINUTES AFTER STARTING NR 1 ENGINE ; FOUND CLAMP FROM NR 1 & 2 OZONE FILTER TO FLOW CONTROL VALVE INSTALLED INCORECTLY & BOTH MISSING O-RING INSTALLED & NEW CLAMPS ON BOTH # 1 & 2 IAW AMM 21-51-41 ALL LEAK & OPS TEST PASSED A/C OK FOR SERVICE AT THIS TIME.