Ask to tech for their manual (AMM or similar name).
Additionally, if the company allows and train the crew to perform and sign the preflight, you shoud receive a paper procedure which includes your requested detail. I mean scratch extent and deep limit and so on.
As far as I know no different limitation for dry, wet, contaminated.
Last edited by Henry VIII; 28th Nov 2008 at 10:19.
Reason: AMM