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Light transport crew descended approximately 1200 ft below minimum altitude on a non precision approach.
| Attributes | |
| ACN | 418944 |
| Time | |
| Date | 199811 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : jln airport : jln |
| State Reference | MO |
| Altitude | msl bound lower : 1600 msl bound upper : 2800 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : jln |
| Operator | common carrier : air taxi |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 85 flight time total : 2800 flight time type : 800 |
| ASRS Report | 418944 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : cfi |
| Experience | flight time last 90 days : 105 flight time total : 1200 flight time type : 900 |
| ASRS Report | 418945 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 5000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Once we were cleared for the localizer/back course approach and established, we (the crew) misidented a stepdown fix and began our descent to MDA approximately 4 mi early. In our descent, we noticed a tower in our path and we deviated around the tower and concluded the approach. What the crew learned from this is to carefully identify all stepdown fixes and thoroughly brief the approach.
Original NASA ASRS Text
Title: LTT CREW DSNDED APPROX 1200 FT BELOW MINIMUM ALT ON A NON PRECISION APCH.
Narrative: ONCE WE WERE CLRED FOR THE LOC/BACK COURSE APCH AND ESTABLISHED, WE (THE CREW) MISIDENTED A STEPDOWN FIX AND BEGAN OUR DSCNT TO MDA APPROX 4 MI EARLY. IN OUR DSCNT, WE NOTICED A TWR IN OUR PATH AND WE DEVIATED AROUND THE TWR AND CONCLUDED THE APCH. WHAT THE CREW LEARNED FROM THIS IS TO CAREFULLY IDENT ALL STEPDOWN FIXES AND THOROUGHLY BRIEF THE APCH.
Data retrieved from NASA's ASRS site as of July 2007 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.