Narrative:

The PF was the sic, the PNF was myself -- the PIC. We were cleared to 11000 ft while descending into pvd and we were in continuous light/occasionally moderate turbulence, IMC, numerous level 2-3 cells in vicinity. At 13500 ft the autoplt disengaged and the PF was working hard to maintain a stabilized descent, plus wings level. I would characterize the ride as continuos moderate turbulence. We observed a level 2-3 cell near the tmu VOR on our radar. Based on range selected I would estimate that the cell was 5-7 mi ene of the VOR. At 12300 ft we noticed our rate of descent suddenly increased from 2000 FPM to nearly 4000 FPM. The PF was advised to pitch up and power up to slow/stop descent. At 5-7 degrees pitch up/takeoff thrust, the aircraft continued to descend. We also observed that roll inputs were nearly ineffective. At 9800 ft the aircraft began to climb. The turbulence subsided and the downdraft/shear was gone. The PF leveled the aircraft at 11000 ft. I advised ATC of the hazardous conditions over tmu and that we were unable to maintain our altitude. Fortunately, we had no passenger on board. The tops of the cells were observed to between 15000-20000 ft earlier in our descent. The lesson learned was plan ahead for deviation requests and allow 20 mi from any convective area/cell.

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Original NASA ASRS Text

Title: FLC OF A BRITISH HAWKER, BAE125-1000 (HS25), LOST CTL OF ACFT'S RATE OF DSCNT DUE TO A SEVERE DOWNDRAFT CAUSED BY A TSTM WINDSHEAR. FO REGAINED CTL OF THE ACFT'S RATE OF DSCNT, AFTER APPLYING TKOF PWR AND PITCHING, AND WAS THEN ABLE TO RETURN TO ASSIGNED ALT.

Narrative: THE PF WAS THE SIC, THE PNF WAS MYSELF -- THE PIC. WE WERE CLRED TO 11000 FT WHILE DSNDING INTO PVD AND WE WERE IN CONTINUOUS LIGHT/OCCASIONALLY MODERATE TURB, IMC, NUMEROUS LEVEL 2-3 CELLS IN VICINITY. AT 13500 FT THE AUTOPLT DISENGAGED AND THE PF WAS WORKING HARD TO MAINTAIN A STABILIZED DSCNT, PLUS WINGS LEVEL. I WOULD CHARACTERIZE THE RIDE AS CONTINUOS MODERATE TURB. WE OBSERVED A LEVEL 2-3 CELL NEAR THE TMU VOR ON OUR RADAR. BASED ON RANGE SELECTED I WOULD ESTIMATE THAT THE CELL WAS 5-7 MI ENE OF THE VOR. AT 12300 FT WE NOTICED OUR RATE OF DSCNT SUDDENLY INCREASED FROM 2000 FPM TO NEARLY 4000 FPM. THE PF WAS ADVISED TO PITCH UP AND PWR UP TO SLOW/STOP DSCNT. AT 5-7 DEGS PITCH UP/TKOF THRUST, THE ACFT CONTINUED TO DSND. WE ALSO OBSERVED THAT ROLL INPUTS WERE NEARLY INEFFECTIVE. AT 9800 FT THE ACFT BEGAN TO CLB. THE TURB SUBSIDED AND THE DOWNDRAFT/SHEAR WAS GONE. THE PF LEVELED THE ACFT AT 11000 FT. I ADVISED ATC OF THE HAZARDOUS CONDITIONS OVER TMU AND THAT WE WERE UNABLE TO MAINTAIN OUR ALT. FORTUNATELY, WE HAD NO PAX ON BOARD. THE TOPS OF THE CELLS WERE OBSERVED TO BTWN 15000-20000 FT EARLIER IN OUR DSCNT. THE LESSON LEARNED WAS PLAN AHEAD FOR DEV REQUESTS AND ALLOW 20 MI FROM ANY CONVECTIVE AREA/CELL.

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.