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Citation flight crew reported descending early on RNAV approach and receiving a low altitude alert from ATC.
| Attributes | |
| ACN | 1601329 |
| Time | |
| Date | 201812 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | PDK.Airport |
| State Reference | GA |
| Environment | |
| Flight Conditions | Marginal |
| Aircraft 1 | |
| Make Model Name | Cessna Citation Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Final Approach |
| Route In Use | Other RNAV 21L |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 75 Flight Crew Total 23600 Flight Crew Type 900 |
| Person 2 | |
| Function | First Officer |
| Qualification | Flight Crew Instrument Flight Crew Flight Engineer Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine |
| Events | |
| Anomaly | Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT |
Narrative:
RNAV 21L approach pdk airport. The flight crew made a mistake interpreting the approach plate. There was a visual step down point and we descended early to MDA 1;500 feet. A note on the plan view we missed briefing on. (LNAV only note number 2 fix sedoy was a visual descent point on the chart required 1;780 to cross for LNAV only). The MDA LNAV for this approach was 1;500 feet MSL. We did have ground contact before MDA. Pdk tower advised altitude alert which alerted the crew. A better review of approach plate on ipad will helpful.
Original NASA ASRS Text
Title: Citation flight crew reported descending early on RNAV approach and receiving a low altitude alert from ATC.
Narrative: RNAV 21L approach PDK airport. The flight crew made a mistake interpreting the approach plate. There was a visual step down point and we descended early to MDA 1;500 feet. A note on the plan view we missed briefing on. (LNAV only note Number 2 fix SEDOY was a visual descent point on the chart required 1;780 to cross for LNAV ONLY). The MDA LNAV for this approach was 1;500 feet MSL. We did have ground contact before MDA. PDK tower advised altitude alert which alerted the crew. A better review of approach plate on iPad will helpful.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.