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Flight crew of an light transport failed to make assigned crossing altitude due to delaying their descent to stay in smoother air!
| Attributes | |
| ACN | 334329 |
| Time | |
| Date | 199604 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : glh airport : mem |
| State Reference | MS |
| Altitude | msl bound lower : 6000 msl bound upper : 9000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : mem |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| 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 | other other : other pilot : atp |
| Experience | flight time last 90 days : 40 flight time total : 2700 flight time type : 40 |
| ASRS Report | 334329 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were told to cross wallet at 6000 ft. We were at 15000 ft for cruise. We elected to stay at 15000 ft for as long as possible, for we had a smooth ride. Based upon DME from glh VOR we began a descent but, we were getting conflicting DME information. From mem VOR we were asked by ZME if we were going to make the crossing altitude. We then realized that glh VOR DME information must be a little off. We accelerated our descent to maximum but could only cross wallet by 9000 ft. At that time glh VOR DME read 72 NM.
Original NASA ASRS Text
Title: FLC OF AN LTT FAILED TO MAKE ASSIGNED XING ALT DUE TO DELAYING THEIR DSCNT TO STAY IN SMOOTHER AIR!
Narrative: WE WERE TOLD TO CROSS WALLET AT 6000 FT. WE WERE AT 15000 FT FOR CRUISE. WE ELECTED TO STAY AT 15000 FT FOR AS LONG AS POSSIBLE, FOR WE HAD A SMOOTH RIDE. BASED UPON DME FROM GLH VOR WE BEGAN A DSCNT BUT, WE WERE GETTING CONFLICTING DME INFO. FROM MEM VOR WE WERE ASKED BY ZME IF WE WERE GOING TO MAKE THE XING ALT. WE THEN REALIZED THAT GLH VOR DME INFO MUST BE A LITTLE OFF. WE ACCELERATED OUR DSCNT TO MAX BUT COULD ONLY CROSS WALLET BY 9000 FT. AT THAT TIME GLH VOR DME READ 72 NM.
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.