T/O B-737 Contaminated RW

[PEI_3721]

Because AC 25-13 prohibits the use of reduced thrust on contaminated runways.

http://rgl.faa.gov/Regulatory_and_Gu...LE/AC25-13.pdf

“Reduced takeoff thrust setting are not authorized on runways contaminated with standing water, snow, slush, or ice, … …. and are not authorized on wet runways unless suitable performance accountability is made for the increased stopping distance on the wet surface.”

Although the AC does not provide a reason for this it is most likely due to the reduced stopping capability, thus the aircraft should accelerate and reach V1 as soon as possible to maximize the total distance available. This is best achieved with full thrust.