In the ole ATPL(H) material Hydraulic Lock is described as different to Jack Stall- which if I remember correctly is a hydraulic force overload. Hydraulic Lock as I understood it from the ATPL(H) studies is a failure (design or mechanical) in which the hydraulic pressure gets around the back of the relevant actuator(s) and the controls become hydraulically 'locked'.
Definition of mourn - feel or show sorrow for the death of (someone), typically by following conventions such as the wearing of black clothes Definition of mourn - feel or show sorrow for the death of (someone), typically by following conventions such as the wearing of black clothes dictionary thesaurus
lamest. 1  1a : having a body part and especially a limb so disabled as to impair freedom of movement The accident left him lame for life.b : marked by stiffness and soreness a lame shoulder. 2  2 : lacking needful or desirable substance : weak, ineffectual a lame excuse. 3  3 slang : not being in the know : square She's cool, but her boyfriend is so lame.