** Australian Clinical Labs ACL.AX falls as much as 2.1% to record low of A$1.87; set for eighth straight session of losses
** Stock hits biggest intraday pct drop since April 23
** Pathology services provider says external IT service used by unit SunDoctors experienced cyber incident
** Says incident led to unauthorised party gaining access to limited part of SunDoctors' systems
** Co currently investigating issue to determine whether any sensitive personal information impacted
** Says no impact to any of co's core operations, systems of its unit restored
** YTD, ACL down 31.2%
(Reporting by Aamir Sheik Khalid in Bengaluru)
((Aamir.SheikKhalid@thomsonreuters.com))