Comp stall, as I'm not familiar and maybe you are- what and where is the obstacle that gives the 5-something % gradient for that runway?
Also, please correct me if I am wrong, but wouldn't it be operating under CAO 20.7.4 and as such, would it or would it not be required to meet that 5-something % obstacle gradient?
My recollection of T/O weight requirements under 20.7.4 is that it must be able to make 6% normal ops and 1% with prop feathered and gear & flap up. Quite different to 20.7.1B.