PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Flight Crew Commercial; Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 35; Flight Crew Total 3130; Flight Crew Type 2600
Situational Awareness
Aircraft Equipment Problem Less Severe; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Provided Assistance; Flight Crew Became Reoriented; Flight Crew Took Evasive Action; Flight Crew Returned To Clearance; Flight Crew Overcame Equipment Problem
Aircraft
Number 1 CDI glideslope indicator failed after glideslope capture on IFR approach. Descent below glide path triggered alarm with ATC which advised below glide path. Switched Number 2 radio CDI and initiated climb rejoining glide path and continued approach. Note localizer functioned normally.
PA28 pilot reported that the Course Deviation Indicator (CDI); failed after capturing the glideslope during an instrument approach.