Medium Transport
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Workload; Troubleshooting; Time Pressure; Distraction; Situational Awareness; Confusion
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem
Environment - Non Weather Related; Aircraft; ATC Equipment / Nav Facility / Buildings
While on a visual approach to Runway 26 at 1755L; at approximately a 2.5 NM mile final; and during the rest of the approach; both RADAR altimeters (RA) started fluctuating and we received RA caution messages along with EFIS COMP MON caution messages. While EFIS COMP MON is not uncommon; they seemed to coexist with the RA cautions.
Air Carrier First Officer reported the radio altimeters began to malfunction while on initial approach to PHX. The pilots began to receive RA and EFIS COMP MON caution messages.