Skyhawk 172/Cutlass 172
Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Instrument
Flight Crew Last 90 Days 100; Flight Crew Total 650; Flight Crew Type 550
Human-Machine Interface; Confusion; Training / Qualification; Communication Breakdown; Situational Awareness
Deviation - Altitude Excursion From Assigned Altitude; Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors; Procedure
Enroute to DVT; we were told to descend to 7;100 feet from our cruising altitude of 11;000 feet. On our descent; we obtained the current weather and began our checklist for descent. Upon reaching our designated indicated altitude of 7;100 feet; Phoenix Approach contacted us with a low altitude warning of 6;800 feet. We immediately started a climb and realized we had omitted changing the altimeter from our current setting of 30.29 to the DVT area altimeter setting of 29.97. After a few minutes; Phoenix Approach told us to contact them at their local number for a Possible Pilot Deviation.Corrective Action: When obtaining current weather; always remember to set the current altimeter setting.
C172 flight instructor reported forgetting to reset the altimeter to the local setting resulting in a low altitude alert from ATC.