FrankR,
Yes, I agree with all you say and the conditions are the same for my type. But even considering temp, trends, wind, moisture on runway, fuel tank temp, time till T/O, the assessment can vary considerably from pilot to pilot based on previous experience.
A friend of mine (first officer) and his captain was failed on a line check for not de-icing when in the opinion of the checker they should've de-iced. Interestingly they were told they'd failed first after landing at destination, meaning the checker did not intervene and ordered de-icing himself. Apparently not fearing for the safety of the ship. This for a well known European carrier, no dodgy Russian carrier in darkest Siberia.
Edit: wording, story
Last edited by 172_driver; 22nd Jan 2014 at 19:31.