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While deviating around thunderstorms during departure, an air carrier flight crew exceeded assigned altitude while in turbulent air. The crew members report that they were unable to hold assigned altitude and that they did not want to exceed structural limits in maintaining altitude.
| Attributes | |
| ACN | 330697 |
| Time | |
| Date | 199603 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : bna |
| State Reference | TN |
| Altitude | msl bound lower : 5000 msl bound upper : 5400 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bna |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 16000 flight time type : 5000 |
| ASRS Report | 330796 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp pilot : commercial pilot : instrument pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 7000 flight time type : 3500 |
| ASRS Report | 330910 |
| Events | |
| Anomaly | altitude deviation : overshoot inflight encounter : weather non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Deviating around thunderstorm in very turbulent air exceeded level off altitude of 5000 ft by 300 ft. Vertical windshear encounter made it hard to hold assigned altitude. Very busy time of flight, both pilots focused on leveloff, but hard to nail it with the turbulence. A situation where we were aware of deviation, but not a lot could be done. Supplemental information from acn 330910: felt it better to deviate altitude 300-400 ft than possibly exceed structural limits of aircraft.
Original NASA ASRS Text
Title: WHILE DEVIATING AROUND TSTMS DURING DEP, AN ACR FLC EXCEEDED ASSIGNED ALT WHILE IN TURBULENT AIR. THE CREW MEMBERS RPT THAT THEY WERE UNABLE TO HOLD ASSIGNED ALT AND THAT THEY DID NOT WANT TO EXCEED STRUCTURAL LIMITS IN MAINTAINING ALT.
Narrative: DEVIATING AROUND TSTM IN VERY TURBULENT AIR EXCEEDED LEVEL OFF ALT OF 5000 FT BY 300 FT. VERT WINDSHEAR ENCOUNTER MADE IT HARD TO HOLD ASSIGNED ALT. VERY BUSY TIME OF FLT, BOTH PLTS FOCUSED ON LEVELOFF, BUT HARD TO NAIL IT WITH THE TURB. A SIT WHERE WE WERE AWARE OF DEV, BUT NOT A LOT COULD BE DONE. SUPPLEMENTAL INFO FROM ACN 330910: FELT IT BETTER TO DEVIATE ALT 300-400 FT THAN POSSIBLY EXCEED STRUCTURAL LIMITS OF ACFT.
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.