Yes, I am retired (how did you guess ?) However, I respectfully suggest you guys read the Boeing winter ops. procedures, the requirements of the FAA , CAA, EASA, and Transport Canada. So far as I can see they are not type specific.They all relate to the “clean” concept. Except, of course for frost under the wing tank surface due cold fuel.
Then go and read the accident reports of : AF 90
SAS 751,
China Eastern 5210
Arrow 1285
Air Ontario 1363
US 405
All very sobering and all relate to improper deicing procedures, and reflect on what might have happened to that flight, if the ice had not been seen by the cabin attendant as say, at night !
...and if the cabin crew could see out of a cabin window, why could’nt the captain take a look himself ?
Coffee finished !
You might learn something.