Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 12; Flight Crew Total 15000; Flight Crew Type 820
Situational Awareness; Training / Qualification
Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT; Inflight Event / Encounter Unstabilized Approach
Flight Crew Became Reoriented; Flight Crew Took Evasive Action; Flight Crew Returned To Clearance; Flight Crew Executed Go Around / Missed Approach
Human Factors
On approach to PNE using the RNAV (GPS) Runway 6 approach we mistakenly started descent from WAMCA instead of JUNIA which was the final approach fix. The Controller issued a low altitude alert and that was followed by the GPWS terrain warning. The pilot not flying called out that we have not reached JUNIA yet and I initiated a climb. Upon reaching JUNIA we descended to the Minimum Descent Altitude (MDA) and continued the approach. Upon seeing the airport visually we were too high to execute a safe landing and went missed approach. On the return we executed the ILS Runway 24 approach and landed.
On the RNAV (GPS) Runway 6 approach at PNE we descended to the Minimum Descent Altitude (MDA) prior to the FAF. Human factors issues to include; lack of awareness; distraction; and lack of assertiveness played a role. ATC was queried and the approach continued to a missed approach. Factors affecting quality of human performance included lack of proficiency; knowledge; and stress.
CE-650 flight crew reported they received a low altitude alert from ATC and a Ground Proximity Warning System (GPWS) terrain warning when they descended below charted altitude on the RNAV GPS approach to PNE.