Originally Posted by
RatherBeFlying
A few years back in YOW, I noticed a fine sprinkling of precip on the wing and pressed the CC call button to ask if the precip was liquid or frozen.
The captain called me forward and suggested that at 3C it had to be liquid. I stated that in my a/c I'd be putting a finger on it to make sure.
I abstained from discussing the physics of cold soaked wings and fuel tanks.
Some years before I observed frost over a tank on a 20+ day, but that type was approved for takeoff with frost in that limited area.
A rampie appeared shortly after and verified it was liquid.
Hear, hear! Once insisted on steps being brought so that I could climb up and check. Ground handling said 'All OK, captain.' I didn't trust them and insisted.
Another time we had been de-iced, noticed residual ice and had the job done again after photographing the evidence.
On yet another occasion, guy threw a bucket of hot water over a cold-soaked wing. Needless to say, it froze on contact.
