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Flight crew of an medium large transport undershot crossing altitude restr during descent on a STAR arrival due to improper programming of FMC for the rate of descent needed for crossing altitude restr.
| Attributes | |
| ACN | 374570 |
| Time | |
| Date | 199707 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : rdu |
| State Reference | NC |
| Altitude | msl bound lower : 10000 msl bound upper : 11500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : zdc |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | other other : other pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 7300 flight time type : 1900 |
| ASRS Report | 374570 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | other other : other pilot : instrument pilot : flight engineer pilot : atp |
| Experience | flight time total : 12000 |
| ASRS Report | 375040 |
| Events | |
| Anomaly | altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : published procedure non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were cleared to cross argal at 10000 ft by ZDC. FMS was in profile and was programmed to cross argal at 250 KTS and 10000 ft. 10000 ft was selected and armed in altitude window. Immediate descent selected in FMS. We eventually leveled at 10000 ft approximately 5 NM past argal.
Original NASA ASRS Text
Title: FLC OF AN MLG UNDERSHOT XING ALT RESTR DURING DSCNT ON A STAR ARR DUE TO IMPROPER PROGRAMMING OF FMC FOR THE RATE OF DSCNT NEEDED FOR XING ALT RESTR.
Narrative: WE WERE CLRED TO CROSS ARGAL AT 10000 FT BY ZDC. FMS WAS IN PROFILE AND WAS PROGRAMMED TO CROSS ARGAL AT 250 KTS AND 10000 FT. 10000 FT WAS SELECTED AND ARMED IN ALT WINDOW. IMMEDIATE DSCNT SELECTED IN FMS. WE EVENTUALLY LEVELED AT 10000 FT APPROX 5 NM PAST ARGAL.
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.