Hoping someone can share some information regarding performance calculations on the 737 with 1 reverser inop.
In our European operator we have a particular set of rules in how we calculate performance with 1 reverser inop and I was just wondering if it is just our company or is dictated by legislation.
We calculate take-off performance with 1 reverser inop from a WET runway but we reduce max weight by 1050kg and reduce V1 by 2 knots.
For take-off calculations from a slippery/contaminated runway with 1 reverser inop we calculate distance using the “no reverse thrust” (we don’t take credit for the remaining one)
For inflight landing calculations onto a runway with 1 reverser inop we use the “No reverse thrust option”.
I realise that it makes sense to do so but I cannot seem to find reference to it from the relevant legislation such as EU OPS but in CS25 I found this under CS25.125 .
“(g) If any device is used that depends on the
operation of any engine, and if the landing distance
would be noticeably increased when a landing is
made with that engine inoperative, the landing
distance must be determined with that engine
inoperative unless the use of compensating means
will result in a landing distance not more than that
with each engine operating.
Is it referring to do or is that something that the manufacture has to take account of with all reversers working?