Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued New Clearance; Flight Crew Took Evasive Action
Procedure; Human Factors
Flew ZONNA1 arrival to TUS. I was PF (Pilot Flying) and did the arrival briefing prior to descent which included terrain hazards and the MSA. Both pilots had terrain selected. Approach control gave us a clearance to turn right to 270 and descend to 10;000' for sequencing. Soon after this clearance we entered IMC. Passing north and abeam Mt Lemmon at about 10;300'; we got an EGPWS TERRAIN PULL UP warning. I executed the EGPWS Recovery Action. Almost immediately we went VMC. After passing the MSA of 10;700 and visually verifying terrain clearance; I resumed normal flight; leveled at 11;000' and informed ATC that we had responded to a GPWS terrain warning. They acknowledged and gave us a descent to 9000'. Remainder of flight was uneventful.Either the Terrain system gave us a false alert or we were given a clearance to descend below the radar minimum altitude. We never got any indication on the Terrain display. STAR page showed us north of Mt Lemmon and the terrain depicted around it. While we had good terrain awareness; I should have queried Approach about an IMC descent below the Sector MSA.I recommend a Radar Minimum Altitudes chart be included in the Jeppesen pages for TUS.
Air carrier flight crew reported receiving a EGPWS warning while being vectored for approach to TUS airport.