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Flight crew of an large transport overshot descent assigned altitude due to relying on autoplt to capture altitude.
| Attributes | |
| ACN | 452361 |
| Time | |
| Date | 199910 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : ott.vor |
| State Reference | MD |
| Altitude | msl bound lower : 27400 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| ASRS Report | 452361 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 12000 flight time type : 200 |
| ASRS Report | 452320 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance none taken : detected after the fact none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Center cleared us for a descent from FL290 to FL280. Flight crew was distraction during descent and autoplt altitude select was either not selected or failed to capture selected altitude of FL280. Flight crew noticed altitude deviation while passing FL274. Autoplt was disconnected and aircraft began to level off. Center reclred aircraft to FL270. No aircraft separation conflict occurred. Both pilots simply began to prepare for arrival while aircraft was descending.
Original NASA ASRS Text
Title: FLC OF AN LGT OVERSHOT DSCNT ASSIGNED ALT DUE TO RELYING ON AUTOPLT TO CAPTURE ALT.
Narrative: CTR CLRED US FOR A DSCNT FROM FL290 TO FL280. FLC WAS DISTR DURING DSCNT AND AUTOPLT ALT SELECT WAS EITHER NOT SELECTED OR FAILED TO CAPTURE SELECTED ALT OF FL280. FLC NOTICED ALTDEV WHILE PASSING FL274. AUTOPLT WAS DISCONNECTED AND ACFT BEGAN TO LEVEL OFF. CTR RECLRED ACFT TO FL270. NO ACFT SEPARATION CONFLICT OCCURRED. BOTH PLTS SIMPLY BEGAN TO PREPARE FOR ARR WHILE ACFT WAS DSNDING.
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.