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An air carrier B737 flight crew descended below their assigned altitude when the captain forgot that he was flying a model that did not have altitude capture.
| Attributes | |
| ACN | 386500 |
| Time | |
| Date | 199711 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : stl |
| State Reference | MO |
| Altitude | msl single value : 3 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time type : 9700 |
| ASRS Report | 386500 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : far non adherence : published procedure non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified 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 B737-200 after flying B737-300 previous 2 days. We had been cleared to descend to FL240. I had been copying ATIS for stl (our destination) and when I finished and looked up, we were passing FL242 and descending at 3200 FPM. I called out 'altitude 240-240' and the captain applied power and stopped the descent at FL234 and returned to FL240. All crew members must be alert, especially after flying aircraft with automatic altitude capture capabilities.
Original NASA ASRS Text
Title: AN ACR B737 FLC DSNDED BELOW THEIR ASSIGNED ALT WHEN THE CAPT FORGOT THAT HE WAS FLYING A MODEL THAT DID NOT HAVE ALT CAPTURE.
Narrative: WE WERE FLYING B737-200 AFTER FLYING B737-300 PREVIOUS 2 DAYS. WE HAD BEEN CLRED TO DSND TO FL240. I HAD BEEN COPYING ATIS FOR STL (OUR DEST) AND WHEN I FINISHED AND LOOKED UP, WE WERE PASSING FL242 AND DSNDING AT 3200 FPM. I CALLED OUT 'ALT 240-240' AND THE CAPT APPLIED PWR AND STOPPED THE DSCNT AT FL234 AND RETURNED TO FL240. ALL CREW MEMBERS MUST BE ALERT, ESPECIALLY AFTER FLYING ACFT WITH AUTOMATIC ALT CAPTURE CAPABILITIES.
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.