** Shares of Structural Monitoring Systems SMN.AX fall as
much as 7% to A$0.465, their biggest intraday percentage loss
since Jan 9
** Stock hits its lowest level since Jan 19
** The sensor technology co says its metal crack detecting
comparative vacuum monitoring (CVM) sensor is facing issues in
receiving certification from Boeing BA.N
** Says timeline for Boeing project will have to be updated
** Adds CVM recorded no revenue during second quarter, while
reporting A$0.12 mln in revenue over half year
** About 85,000 shares change hands, compared with the
30-day average volume of 36,480
** SMN stock rose 43.5% last year
(Reporting by Aaditya Govind Rao in Bengaluru)
((Aaditya.govindrao@thomsonreuters.com;))