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Medium large transport air carrier started descent at wrong altitude having misread approach plate wrong at pdx.
| Attributes | |
| ACN | 439316 |
| Time | |
| Date | 199906 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : pdx.airport |
| State Reference | OR |
| Altitude | msl bound lower : 2200 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mmv.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 28r |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 9000 flight time type : 5000 |
| ASRS Report | 439316 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : became reoriented flight crew : returned to assigned airspace |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
As we were cleared for the ILS to runway 28R, the first officer (PNF) put 1900 ft in the MCP window. We started down and at approximately 2200 ft I noticed that the ILS GS intercept altitude was 3000 ft. The first officer put in the localizer stepdown altitude. We leveled off at 2200 ft and intercepted the GS. This particular approach plate is tough to read. The localizer altitudes are in bold faced print and they look a lot like the GS intercept altitude.
Original NASA ASRS Text
Title: MLG ACR STARTED DSCNT AT WRONG ALT HAVING MISREAD APCH PLATE WRONG AT PDX.
Narrative: AS WE WERE CLRED FOR THE ILS TO RWY 28R, THE FO (PNF) PUT 1900 FT IN THE MCP WINDOW. WE STARTED DOWN AND AT APPROX 2200 FT I NOTICED THAT THE ILS GS INTERCEPT ALT WAS 3000 FT. THE FO PUT IN THE LOC STEPDOWN ALT. WE LEVELED OFF AT 2200 FT AND INTERCEPTED THE GS. THIS PARTICULAR APCH PLATE IS TOUGH TO READ. THE LOC ALTS ARE IN BOLD FACED PRINT AND THEY LOOK A LOT LIKE THE GS INTERCEPT ALT.
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.