contaminated rwy or not?

[Sammy]

this is a current notam for teb:

TEB 02/075 TEB 6/24 THN LSR OVR PSR DEICED SOLID 50 WIDE WEF
0702150452
TEB 02/076 TEB 6 SFH MU 21/28/50 WEF 0702150441

1.) when the notam says deiced does that mean in this case there is a 50 foot width of the rwy that has no contaminate on it? seems to me i have been in this situation before only to find that the contaminate is still visable, but has deice liquid/solid on it. I assume that performance is still based on LSR/PSR because my advisory section of AFM does not reference deice of rwy?

2.) when computing performance for takeoff/landing would it be legal/safe to use LSR since it is on top of the PSR or would you use whichever number gave you the worst case?

Mu's are too low for me regardless, but just curious how others view this notam. thanks!

 

[LearDriver]

We took off yesterday on rnwy 6 only when the mu's came up to 30 something values (5pm). The metars read very similar to what you posted.

It is my understanding that the wording simply means that 50' width has been treated the length of the runway. When we took off there was still considerable slr / psr / ir and slush in the treated area.

Regarding Performance: I would use worst case scenario... IMHO

On a side note, we were very suprised and a bit dissapointed to see so many many aircraft departing prior to the mu's climbing out of the NIL readings. I guess they are just a lot more "brave" than me. I like to be able to stop if need be.