Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Training / Qualification
Conflict Ground Conflict; Less Severe; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Flight Crew Returned To Clearance; Flight Crew FLC complied w / Automation / Advisory
Human Factors
I was giving a demo instruction flight to a potential buyer of this aircraft. I was instructing and monitoring the RNAV approach. We were cleared for the approach and inside of ZZZZZ. The airspace and frequency was very busy. I was looking for traffic when we received a minimum vectoring altitude alert by the Tower or ATC. I immediately took the controls and initiated a climb from 1;900 feet to 2400 feet (we intercepted the glide path). After landing I called the tower who told me they were only concerned as we were getting low. They stated it was 1;700 feet however when I took the controls I noted 1;900 feet on the altimeter. They advised no action would be taken. I had them call TRACON who said the where same. It was VMC when this event occurred.
PA46 flight instructor reported descending too low on approach resulted in a low altitude alert.