#3509 Air-comp Safety valve keep purging ~~~~~ Replaced compressor safety v/v but purging did not stop.Check downstream,air dryer function ok but micromesh filter found filled with white powder.Postuate micromesh filter choked by white powder(likely degraded dessicant) causing compressor safety v/v to purg due to excessive pressure build up.Change out #3509 air dryer-function test ok.Dryer able to switch over and purge.

Air Dryer #3509-
New s/n: 3515-140275
Old s/n: 015-13878
Notification: 2342074 raise to RSW.

Done by Arthur Sam/Lim J.H. 16/12/21