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Flight crew of an embraer brasilia EMB120 overshot altitude on descent to a cruise altitude 1000 ft lower due to not noticing that the autoplt was not leveling off the aircraft and the altitude alerter did not give normal warning.
| Attributes | |
| ACN | 398257 |
| Time | |
| Date | 199803 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : amg |
| State Reference | GA |
| Altitude | msl bound lower : 19000 msl bound upper : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | Other |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | other other : other pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 250 flight time total : 9500 flight time type : 7000 |
| ASRS Report | 398257 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | other other : other pilot : instrument pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 225 flight time total : 2300 flight time type : 1500 |
| ASRS Report | 397540 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were in cruise flight at FL210 and given a clearance to descend to FL200. We began our descent at about 700 FPM with the autoplt engaged. The altitude alerter was set for FL200, however, the autoplt did not level off at FL200. Also, the altitude alerter never alerted us that the autoplt did not capture altitude. Recognizing the problem, we disengaged the autoplt to level at FL190. The controller questioned us about our altitude. We acknowledged that we were assigned FL200. The controller advised us to continue to maintain FL190, and he implied that it was 'no problem.'
Original NASA ASRS Text
Title: FLC OF AN EMBRAER BRASILIA EMB120 OVERSHOT ALT ON DSCNT TO A CRUISE ALT 1000 FT LOWER DUE TO NOT NOTICING THAT THE AUTOPLT WAS NOT LEVELING OFF THE ACFT AND THE ALT ALERTER DID NOT GIVE NORMAL WARNING.
Narrative: WE WERE IN CRUISE FLT AT FL210 AND GIVEN A CLRNC TO DSND TO FL200. WE BEGAN OUR DSCNT AT ABOUT 700 FPM WITH THE AUTOPLT ENGAGED. THE ALT ALERTER WAS SET FOR FL200, HOWEVER, THE AUTOPLT DID NOT LEVEL OFF AT FL200. ALSO, THE ALT ALERTER NEVER ALERTED US THAT THE AUTOPLT DID NOT CAPTURE ALT. RECOGNIZING THE PROB, WE DISENGAGED THE AUTOPLT TO LEVEL AT FL190. THE CTLR QUESTIONED US ABOUT OUR ALT. WE ACKNOWLEDGED THAT WE WERE ASSIGNED FL200. THE CTLR ADVISED US TO CONTINUE TO MAINTAIN FL190, AND HE IMPLIED THAT IT WAS 'NO PROB.'
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.