first you've got to generate a Cusotom Report Template in
RME > Reports > Custom Report Template > Create
choose 'Syslog' as the application (>Next), define a name for the Report Template then click 'Add' to define the message filter;
in your case it should be
Facility: FILESYS
Sub-facility: *
Severity:5
Mnemonic: CFLASH
Description: *
then click 'Save' and 'Finish';
when you've done this, you can use this template to generate a Report in
RME > Reports > Report Generator
select 'Syslog' as the application and scroll down to select the template Name you've just created