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ILS approach with stepdown altitudes based on DME from the VOR. Flight crew fell into trap of using the ILS DME and descended too early.
| Attributes | |
| ACN | 343318 |
| Time | |
| Date | 199608 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : slc |
| State Reference | UT |
| Altitude | msl bound lower : 9100 msl bound upper : 9100 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : slc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : atp pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 270 flight time total : 7000 flight time type : 1000 |
| ASRS Report | 343318 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were flying the runway 34R ILS DME at slc. The stepdown fixes are determined off of slc VOR. However, we were receiving DME from the ILS localizer and accomplished our stepdowns off of this DME. Since the slc VOR is north of the field, we actually were descending earlier than depicted on the chart. We corrected our altitude. This is a chart set up that leads a pilot right down the violation path. Please get the word out. Better yet, make the change.
Original NASA ASRS Text
Title: ILS APCH WITH STEPDOWN ALTS BASED ON DME FROM THE VOR. FLC FELL INTO TRAP OF USING THE ILS DME AND DSNDED TOO EARLY.
Narrative: WE WERE FLYING THE RWY 34R ILS DME AT SLC. THE STEPDOWN FIXES ARE DETERMINED OFF OF SLC VOR. HOWEVER, WE WERE RECEIVING DME FROM THE ILS LOC AND ACCOMPLISHED OUR STEPDOWNS OFF OF THIS DME. SINCE THE SLC VOR IS N OF THE FIELD, WE ACTUALLY WERE DSNDING EARLIER THAN DEPICTED ON THE CHART. WE CORRECTED OUR ALT. THIS IS A CHART SET UP THAT LEADS A PLT RIGHT DOWN THE VIOLATION PATH. PLEASE GET THE WORD OUT. BETTER YET, MAKE THE CHANGE.
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.