A320
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Became Reoriented; Flight Crew Overcame Equipment Problem
Aircraft
During the descent into DEN while on the WAHUU arrival with all crossing altitude restrictions verified. We had the aircraft in Speed/ Destination/ Nav mode; at 17;230 feet we crossed SAYGE intersection and the aircraft auto switched into V/S -1;100 FPM. We got the 'degraded' aural warning and then switched the aircraft back into managed mode. It stayed in this mode the rest of the way down making all altitude crossings. This is the second time this has happened to me in the last week. I had the same thing happen in February while descending into BWI. This is why i'm filing it this time because it seems to be a pattern. Our crews should be made aware that this is happening and to use greater vigilance while in managed descent mode and to report it when it happens so that we can get Airbus to do something about it!
While in a managed descent on the WAHUU arrival to DEN; an A320 Captain reports crossing SAYGE at 17;230 feet when a chirp is heard and the autopilot reverts to V/S at -1100 FPM. VNAV is reengaged and performs normally for the remainder of the arrival.