If you get a 'fail 5' indication on the sincgars radio what do you do?

Fail 5 means mean that the radio is not detecting the COMCSEC CCA. This is usually due to the radio's COMSEC knob being in the PT position.

Note: Impossible to answer unless you define exactly what you mean by " radio 5". Did you mean BBC Radio 5 in the UK? If so did you mean Satellite or land based Broadcasts? For land based...

http://uk-mkivs.net/forums/p/18010/170840.aspx#170840

its D.A.B. and online, not on radio as yet! i have dab

1. releasing of heat 2. change of color 3. bubbling 4. change of smell 5. precipitation