Below is an interesting AD from CASA, dated 2001/2002, with regard to faulty A321 ACT electrical bonding with possible resulting electrical discharge.
Kogalymavia Flight 9268 A321-231 is S/N 663. It does appear then, that this aircraft was fitted with at least one ACT.
https://www.comlaw.gov.au/Details/F2...5-10b927afc679