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Flight crew of a B757 failed to make descent crossing altitude due to the late programming of the aircraft FMS.
| Attributes | |
| ACN | 435400 |
| Time | |
| Date | 199904 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : ott.vor |
| State Reference | MD |
| Altitude | msl bound lower : 15000 msl bound upper : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | cruise : descent cruise : enroute altitude change descent : intermediate altitude |
| Route In Use | arrival star : hedge.dpnt4 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 11000 flight time type : 500 |
| 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 controllera |
| Resolutory Action | controller : issued alert other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were cleared to cross 'jaybo' at 15000 ft (as published). I acknowledged the clearance and the captain (PF) set it up in the FMC. In retrospect, I realize now that we were past the FMC computed TOD (top of descent) and therefore the descent wasn't initiated. We must have been distracted and didn't pick up on this. The controller notified us that we were supposed to cross 'jaybo' at 15000 ft. At that point we initiated an expedited descent.
Original NASA ASRS Text
Title: FLC OF A B757 FAILED TO MAKE DSCNT XING ALT DUE TO THE LATE PROGRAMMING OF THE ACFT FMS.
Narrative: WE WERE CLRED TO CROSS 'JAYBO' AT 15000 FT (AS PUBLISHED). I ACKNOWLEDGED THE CLRNC AND THE CAPT (PF) SET IT UP IN THE FMC. IN RETROSPECT, I REALIZE NOW THAT WE WERE PAST THE FMC COMPUTED TOD (TOP OF DSCNT) AND THEREFORE THE DSCNT WASN'T INITIATED. WE MUST HAVE BEEN DISTRACTED AND DIDN'T PICK UP ON THIS. THE CTLR NOTIFIED US THAT WE WERE SUPPOSED TO CROSS 'JAYBO' AT 15000 FT. AT THAT POINT WE INITIATED AN EXPEDITED DSCNT.
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.