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A B727 sinks 300 ft below its assigned altitude while on a radar vectored downwind for runway 4R at ord.
| Attributes | |
| ACN | 415150 |
| Time | |
| Date | 199809 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 3700 msl bound upper : 4000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord tower : ord |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 415150 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera 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:
Downwind vector ord runway 4R. Deviated 300 ft below assigned 4000 ft during vectors. We got a warning from the altitude alert about the same time the controller asked us to maintain 4000 ft. At the time, I was flying and attempting to brief the approach. We all missed the trend. Classic heads down. We were somewhat tired for various reasons -- among them a 3 hour situation at a station that has a crew room, which is cramped as well as noisy. Still, we all know better, and I consider it my fault.
Original NASA ASRS Text
Title: A B727 SINKS 300 FT BELOW ITS ASSIGNED ALT WHILE ON A RADAR VECTORED DOWNWIND FOR RWY 4R AT ORD.
Narrative: DOWNWIND VECTOR ORD RWY 4R. DEVIATED 300 FT BELOW ASSIGNED 4000 FT DURING VECTORS. WE GOT A WARNING FROM THE ALT ALERT ABOUT THE SAME TIME THE CTLR ASKED US TO MAINTAIN 4000 FT. AT THE TIME, I WAS FLYING AND ATTEMPTING TO BRIEF THE APCH. WE ALL MISSED THE TREND. CLASSIC HEADS DOWN. WE WERE SOMEWHAT TIRED FOR VARIOUS REASONS -- AMONG THEM A 3 HR SIT AT A STATION THAT HAS A CREW ROOM, WHICH IS CRAMPED AS WELL AS NOISY. STILL, WE ALL KNOW BETTER, AND I CONSIDER IT MY FAULT.
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.