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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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B737-300 descends below rvsm structure when neither autoplt would engage as required for continued flight.
| Attributes | |
| ACN | 744281 |
| Time | |
| Date | 200707 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 34000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 149 |
| ASRS Report | 744281 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Supplementary | |
| Problem Areas | Airspace Structure Aircraft |
| Primary Problem | Aircraft |
Narrative:
Unable rvsm because neither autoplt would engage at 34000 ft. I do not believe any errors were committed. I am reporting this because of a requirement to do so. Upon reaching 34000 ft (our cruise altitude) the first officer was unable to engage either autoplt. We advised ATC and descended to 29000 ft. We continued to our destination uneventfully.
Original NASA ASRS Text
Title: B737-300 DESCENDS BELOW RVSM STRUCTURE WHEN NEITHER AUTOPLT WOULD ENGAGE AS REQUIRED FOR CONTINUED FLT.
Narrative: UNABLE RVSM BECAUSE NEITHER AUTOPLT WOULD ENGAGE AT 34000 FT. I DO NOT BELIEVE ANY ERRORS WERE COMMITTED. I AM RPTING THIS BECAUSE OF A REQUIREMENT TO DO SO. UPON REACHING 34000 FT (OUR CRUISE ALT) THE FO WAS UNABLE TO ENGAGE EITHER AUTOPLT. WE ADVISED ATC AND DSNDED TO 29000 FT. WE CONTINUED TO OUR DEST UNEVENTFULLY.
Data retrieved from NASA's ASRS site as of January 2009 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.