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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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A B73S FMS profile descent failed to meet a crossing restr. The flight crew reverted to manual flight. Altitude crossing restr. Altitude deviation altitude undershot.
| Attributes | |
| ACN | 320820 |
| Time | |
| Date | 199511 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : vxv |
| State Reference | TN |
| Altitude | msl bound lower : 29000 msl bound upper : 29500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | enroute : direct enroute airway : ztl |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 10000 flight time type : 500 |
| ASRS Report | 320820 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 18000 flight time type : 4000 |
| ASRS Report | 320705 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Cleared to cross intersection at 29000 ft. FMC started down late so manually flew to make restr. Crossed intersection at 29500 ft. Supplemental information from acn 320705: descended late, may have been high at crossing point. Partial equipment failure.
Original NASA ASRS Text
Title: A B73S FMS PROFILE DSCNT FAILED TO MEET A XING RESTR. THE FLC REVERTED TO MANUAL FLT. ALT XING RESTR. ALTDEV ALT UNDERSHOT.
Narrative: CLRED TO CROSS INTXN AT 29000 FT. FMC STARTED DOWN LATE SO MANUALLY FLEW TO MAKE RESTR. CROSSED INTXN AT 29500 FT. SUPPLEMENTAL INFO FROM ACN 320705: DSNDED LATE, MAY HAVE BEEN HIGH AT XING POINT. PARTIAL EQUIP FAILURE.
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.