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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Late at night an air carrier crew computes their top of descent incorrectly making it impossible to make the assigned crossing restr. Coordination with ARTCC allows them to cross 4000 ft high.
| Attributes | |
| ACN | 479830 |
| Time | |
| Date | 200007 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| State Reference | PA |
| Altitude | msl single value : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 146 flight time total : 10300 flight time type : 300 |
| ASRS Report | 479830 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
I was PF, sfo to phl, PM45 local time. Had been cleared direct to har. Assigned to cross D45 west of har at FL250 by ZOB. I wrote this down on my scratch pad, and then did my calculation on where to start the descent based on crossing D15 west of har. We crossed D45 at approximately FL290, after talking to center about it. Too tired, too late at night.
Original NASA ASRS Text
Title: LATE AT NIGHT AN ACR CREW COMPUTES THEIR TOP OF DSCNT INCORRECTLY MAKING IT IMPOSSIBLE TO MAKE THE ASSIGNED XING RESTR. COORD WITH ARTCC ALLOWS THEM TO CROSS 4000 FT HIGH.
Narrative: I WAS PF, SFO TO PHL, PM45 LCL TIME. HAD BEEN CLRED DIRECT TO HAR. ASSIGNED TO CROSS D45 W OF HAR AT FL250 BY ZOB. I WROTE THIS DOWN ON MY SCRATCH PAD, AND THEN DID MY CALCULATION ON WHERE TO START THE DSCNT BASED ON XING D15 W OF HAR. WE CROSSED D45 AT APPROX FL290, AFTER TALKING TO CTR ABOUT IT. TOO TIRED, TOO LATE AT NIGHT.
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.