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King air 350 first officer descended below 2;300 ft prior to bnnus during the RNAV runway 24 approach to lou in VMC. ATC issued a low altitude alert and crew corrected.
| Attributes | |
| ACN | 883664 |
| Time | |
| Date | 201004 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | LOU.Airport |
| State Reference | KY |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Super King Air 350 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Approach |
| Route In Use | Other RNAV 24 |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autopilot |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 10 Flight Crew Total 11600 Flight Crew Type 40 |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT |
Narrative:
We brought up the RNAV 24 approach at lou. FMS showed bnnus altitude as 474; not 2;300 ft MSL as on the plate. Questioned disparity and told it should figure a glideslope at 3 degrees and stop at 2;300 ft MSL at bnnus; per the captain (pilot flying). I am trained on honeywell and not collins so I indicated I would monitor altitude at bnnus. As would be the case we were distracted and the autopilot flew us to 1;800 ft prior to bnnus; before the low altitude approach call from TRACON. We were VFR at time of this call with airport in sight; but approach was not aware of this. Should have insisted on putting 2;300 ft in FMS to make sure we stopped at that altitude rather than just trust.
Original NASA ASRS Text
Title: King Air 350 First Officer descended below 2;300 FT prior to BNNUS during the RNAV Runway 24 approach to LOU in VMC. ATC issued a low altitude alert and crew corrected.
Narrative: We brought up the RNAV 24 Approach at LOU. FMS showed BNNUS altitude as 474; not 2;300 FT MSL as on the plate. Questioned disparity and told it should figure a glideslope at 3 degrees and stop at 2;300 FT MSL at BNNUS; per the Captain (Pilot Flying). I am trained on Honeywell and not Collins so I indicated I would monitor altitude at BNNUS. As would be the case we were distracted and the autopilot flew us to 1;800 FT prior to BNNUS; before the low altitude approach call from TRACON. We were VFR at time of this call with airport in sight; but Approach was not aware of this. Should have insisted on putting 2;300 FT in FMS to make sure we stopped at that altitude rather than just trust.
Data retrieved from NASA's ASRS site as of April 2012 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.