The LOC mode becomes unusable at low level due to the loss of the radalts. The radalts apply a smoothing correction to the guidance. At minimums with this failure you are flying raw data, so if necessary adjust your minima accordingly.This is described in the FCTM.(AO-34 Dual Radio Altimeter Failure)
Last edited by tubby linton; 21st May 2017 at 21:02.