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A non adherence to ATC instruction leads to an altitude deviation in a delayed descent during thunderstorm activity.
| Attributes | |
| ACN | 179955 |
| Time | |
| Date | 199106 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : clt |
| State Reference | NC |
| Altitude | msl bound lower : 9000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 270 flight time total : 5500 flight time type : 3200 |
| ASRS Report | 179955 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : undershoot non adherence : far non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Was instructed to descend to and maintain 9000'. Had been previously cleared to deviate as needed around buildups and thunderstorms. Did not descend right away. Next call from controller, several mins later, was to verify our altitude. We responded, 'out of 11000 for 9000.' I was talking with the first officer about the WX and the aircraft and I missed the descent instructions, although the first officer had the new altitude displayed in our altitude selector.
Original NASA ASRS Text
Title: A NON ADHERENCE TO ATC INSTRUCTION LEADS TO AN ALT DEVIATION IN A DELAYED DESCENT DURING TSTM ACTIVITY.
Narrative: WAS INSTRUCTED TO DSND TO AND MAINTAIN 9000'. HAD BEEN PREVIOUSLY CLRED TO DEVIATE AS NEEDED AROUND BUILDUPS AND TSTMS. DID NOT DSND RIGHT AWAY. NEXT CALL FROM CTLR, SEVERAL MINS LATER, WAS TO VERIFY OUR ALT. WE RESPONDED, 'OUT OF 11000 FOR 9000.' I WAS TALKING WITH THE F/O ABOUT THE WX AND THE ACFT AND I MISSED THE DSNT INSTRUCTIONS, ALTHOUGH THE F/O HAD THE NEW ALT DISPLAYED IN OUR ALT SELECTOR.
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.