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During descent, a widebody transport flight crew did not observe autoflt altitude capture failure, and overshot assigned altitude. One crew member cited distraction with duties, and short flight as contributing factors.
| Attributes | |
| ACN | 302612 |
| Time | |
| Date | 199504 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : rbv |
| State Reference | NJ |
| Altitude | msl bound lower : 4600 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors enroute airway : n90 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain observation : company check pilot oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 15000 flight time type : 4000 |
| ASRS Report | 302612 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 20 flight time total : 3000 flight time type : 20 |
| ASRS Report | 302522 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Cleared by ZNY to descend from 6000 ft to 5000 ft. On autoplt the FMA went to altitude capture but went through 5000 ft and did not establish altitude hold but continued a descent. Captain discovered the descent to 280 ft below 5000 ft and immediately took over the aircraft and climbed back to 5000 ft (I was the captain/lca.) supplemental information from acn 302522: ATC said nothing. Supp.emental information from acn 302679: takeoff from phl en route to ewr a short, busy flight, got distracted with other duties and autoplt didn't catch us.
Original NASA ASRS Text
Title: DURING DSCNT, A WDB FLC DID NOT OBSERVE AUTOFLT ALT CAPTURE FAILURE, AND OVERSHOT ASSIGNED ALT. ONE CREW MEMBER CITED DISTR WITH DUTIES, AND SHORT FLT AS CONTRIBUTING FACTORS.
Narrative: CLRED BY ZNY TO DSND FROM 6000 FT TO 5000 FT. ON AUTOPLT THE FMA WENT TO ALT CAPTURE BUT WENT THROUGH 5000 FT AND DID NOT ESTABLISH ALT HOLD BUT CONTINUED A DSCNT. CAPT DISCOVERED THE DSCNT TO 280 FT BELOW 5000 FT AND IMMEDIATELY TOOK OVER THE ACFT AND CLBED BACK TO 5000 FT (I WAS THE CAPT/LCA.) SUPPLEMENTAL INFO FROM ACN 302522: ATC SAID NOTHING. SUPP.EMENTAL INFO FROM ACN 302679: TKOF FROM PHL ENRTE TO EWR A SHORT, BUSY FLT, GOT DISTRACTED WITH OTHER DUTIES AND AUTOPLT DIDN'T CATCH US.
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.