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Medium large transport unable to reach assigned altitude, causes possible less than standard separation.
| Attributes | |
| ACN | 103491 |
| Time | |
| Date | 198902 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : jan |
| State Reference | MS |
| Altitude | msl bound lower : 32800 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zme |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp pilot : cfi pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 225 flight time total : 21000 flight time type : 3000 |
| ASRS Report | 103491 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 75 flight time total : 2055 flight time type : 155 |
| ASRS Report | 103443 |
| Events | |
| Anomaly | altitude deviation : undershoot inflight encounter : weather non adherence : clearance non adherence : required legal separation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
At FL290 the top of a thunderstorm was building in front of us. We requested FL330, which was our optimum cruise altitude, anyway. The controller advised us of traffic at FL310 near jan. We entered the top of the thunderstorm and immediately requested an off course vector to climb to FL330. We were given a turn to 150 degree and cleared to FL330. The controller wanted us level in 3 min. At 32800' MSL the aircraft would not climb any further nor maintain that altitude, therefore a vector for descent was requested and obtained. We were cleared to FL310 and then requested to descend to FL290. The controller was heard vectoring the other aircraft away to prevent conflict. Flight was resumed at FL290 and we were cleared direct to jan and flight plan route.
Original NASA ASRS Text
Title: MLG UNABLE TO REACH ASSIGNED ALT, CAUSES POSSIBLE LESS THAN STANDARD SEPARATION.
Narrative: AT FL290 THE TOP OF A TSTM WAS BUILDING IN FRONT OF US. WE REQUESTED FL330, WHICH WAS OUR OPTIMUM CRUISE ALT, ANYWAY. THE CTLR ADVISED US OF TFC AT FL310 NEAR JAN. WE ENTERED THE TOP OF THE TSTM AND IMMEDIATELY REQUESTED AN OFF COURSE VECTOR TO CLIMB TO FL330. WE WERE GIVEN A TURN TO 150 DEG AND CLRED TO FL330. THE CTLR WANTED US LEVEL IN 3 MIN. AT 32800' MSL THE ACFT WOULD NOT CLIMB ANY FURTHER NOR MAINTAIN THAT ALT, THEREFORE A VECTOR FOR DSCNT WAS REQUESTED AND OBTAINED. WE WERE CLRED TO FL310 AND THEN REQUESTED TO DSND TO FL290. THE CTLR WAS HEARD VECTORING THE OTHER ACFT AWAY TO PREVENT CONFLICT. FLT WAS RESUMED AT FL290 AND WE WERE CLRED DIRECT TO JAN AND FLT PLAN ROUTE.
Data retrieved from NASA's ASRS site as of August 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.