 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A DC10-30 freighter overshot its altitude by 350 ft in descent when the autoplt automatic capture fails to level aircraft at FL240.
| Attributes | |
| ACN | 393650 |
| Time | |
| Date | 199802 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : atl |
| State Reference | GA |
| Altitude | msl bound lower : 23650 msl bound upper : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 30F |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 100 flight time total : 7000 flight time type : 30 |
| ASRS Report | 393650 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 13000 flight time type : 2100 |
| ASRS Report | 394435 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Descent to FL240. Armed altitude for FL240. Noticed the autoplt was not capturing altitude. Resumed manual control. Aircraft continued to descend to 350 ft below assigned altitude. Recovered and returned to FL240. Contributing causes: crew was tired. Crew was on duty over 8 hours and had flown through the night. Supplemental information from acn 394435: route of flight was ewr-fll, fll-atl, atl-mem. I need to be less trusting of the automation. Trip pairing was too demanding for our level of rest.
Original NASA ASRS Text
Title: A DC10-30 FREIGHTER OVERSHOT ITS ALT BY 350 FT IN DSCNT WHEN THE AUTOPLT AUTO CAPTURE FAILS TO LEVEL ACFT AT FL240.
Narrative: DSCNT TO FL240. ARMED ALT FOR FL240. NOTICED THE AUTOPLT WAS NOT CAPTURING ALT. RESUMED MANUAL CTL. ACFT CONTINUED TO DSND TO 350 FT BELOW ASSIGNED ALT. RECOVERED AND RETURNED TO FL240. CONTRIBUTING CAUSES: CREW WAS TIRED. CREW WAS ON DUTY OVER 8 HRS AND HAD FLOWN THROUGH THE NIGHT. SUPPLEMENTAL INFO FROM ACN 394435: RTE OF FLT WAS EWR-FLL, FLL-ATL, ATL-MEM. I NEED TO BE LESS TRUSTING OF THE AUTOMATION. TRIP PAIRING WAS TOO DEMANDING FOR OUR LEVEL OF REST.
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.