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A B757-200 flight crew overshoots their assigned altitude when they misprogram the altitude alerter to a lower altitude while in climb near amg, GA.
| Attributes | |
| ACN | 472100 |
| Time | |
| Date | 200005 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : amg.vortac |
| State Reference | GA |
| Altitude | msl bound lower : 28000 msl bound upper : 28500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 120 flight time total : 11600 flight time type : 2000 |
| ASRS Report | 472100 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance non adherence : published procedure |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to assigned altitude |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Climbing to assigned altitude of FL280. FMS programmed for FL290. Prior to reaching FL280, ATC cleared us to cross amg VOR at FL240. We reset altitude window to FL240. FMS VNAV 'took over' and continued our climb toward FL290 versus assigned altitude of FL280/FL240. We caught it as we climbed through FL285 and returned to FL280 -- thence via clearance to FL240. Primary cause was the new clearance just prior to leveloff. Reprogramming FMS prior to altitude capture, caused loss of capture at FL280. Should have waited for altitude capture before resetting altitude window/FMS to reflect new clearance.
Original NASA ASRS Text
Title: A B757-200 FLC OVERSHOOTS THEIR ASSIGNED ALT WHEN THEY MISPROGRAM THE ALT ALERTER TO A LOWER ALT WHILE IN CLB NEAR AMG, GA.
Narrative: CLBING TO ASSIGNED ALT OF FL280. FMS PROGRAMMED FOR FL290. PRIOR TO REACHING FL280, ATC CLRED US TO CROSS AMG VOR AT FL240. WE RESET ALT WINDOW TO FL240. FMS VNAV 'TOOK OVER' AND CONTINUED OUR CLB TOWARD FL290 VERSUS ASSIGNED ALT OF FL280/FL240. WE CAUGHT IT AS WE CLBED THROUGH FL285 AND RETURNED TO FL280 -- THENCE VIA CLRNC TO FL240. PRIMARY CAUSE WAS THE NEW CLRNC JUST PRIOR TO LEVELOFF. REPROGRAMMING FMS PRIOR TO ALT CAPTURE, CAUSED LOSS OF CAPTURE AT FL280. SHOULD HAVE WAITED FOR ALT CAPTURE BEFORE RESETTING ALT WINDOW/FMS TO REFLECT NEW CLRNC.
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.