Airbus Question (A 320 -100)
Does anyone know what may have caused the following?
Before engine start I noticed on the F/O's PFD that the pitch down graduations were visible (as well as the normal pitch up indications) along with a Rad Alt indication (fluctuating). We reset the cb's for both rad alts with no success. In the end we dispatched with Rad Alt 2 c/b pulled and hence were Cat 2 capable only (with wx deteriorating at destination - hence 3 tonnes xtra taken!). On approach for a Cat 2 landing we received a spurious 'hundred above' and 'minimums' call at around 2500' followed by the correct auto callouts at the right time.
Was this just simply a rad alt failure or something else?