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Advanced cockpit medium large transport unable to make altitude crossing restr when the engine power level is thought to be at idle, as per flight management annunciator, but is actually at a non stated higher level of power.
| Attributes | |
| ACN | 346890 |
| Time | |
| Date | 199609 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zzz |
| State Reference | US |
| Altitude | msl bound lower : 36300 msl bound upper : 37000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz tower : ugn |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time total : 25000 |
| ASRS Report | 346890 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
ATC instructions to descend to FL350 from FL370. At FL363, aircraft started to climb even though flight management annunciator showed idle operation descent. Could not make crossing restr.
Original NASA ASRS Text
Title: ADVANCED COCKPIT MLG UNABLE TO MAKE ALT XING RESTR WHEN THE ENG PWR LEVEL IS THOUGHT TO BE AT IDLE, AS PER FLT MGMNT ANNUNCIATOR, BUT IS ACTUALLY AT A NON STATED HIGHER LEVEL OF PWR.
Narrative: ATC INSTRUCTIONS TO DSND TO FL350 FROM FL370. AT FL363, ACFT STARTED TO CLB EVEN THOUGH FLT MGMNT ANNUNCIATOR SHOWED IDLE OP DSCNT. COULD NOT MAKE XING RESTR.
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.