Light twin pilot reported encountering severe turbulence and windshear on downwind for the slc ILS r...

Attributes
ACN	1426758
Time
Date	201702
Local Time Of Day	1801-2400
Place
Locale Reference	SLC.Airport
State Reference	UT
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	Small Transport Low Wing 2 Turboprop Eng
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Single Pilot
Qualification	Flight Crew Commercial Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 20 Flight Crew Total 3200 Flight Crew Type 600
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence

Narrative:

Had lined up for the ILS 3 at ogd; but at glideslope intercept weather had dropped to 1/4 miles and 400 ft ceilings. Broke off approach and was vectored to the west to see if weather would move through. That didn't occur so we requested an approach to land slc and were vectored to slc ILS 34L. Approximately 10 miles downwind in solid IMC; autopilot and altitude hold on and about to turn base we hit a downdraft that dropped us approximately 2000 feet. Horizon ball was all brown; autopilot and altitude were ineffective; the loss of control set off the master warning system due to lack of fuel (at the time we had 750 lbs per side); and the terrain warning went off. Recovery was accomplished; but with a 2000 foot gain (assigned altitude 10000 at the floor of incident approximately 8000 at the ceiling of incident approximately 12000). I was then routed back to the west and north on vectors for sequencing back to the ILS 34L slc that was shot with a side step on final in VFR conditions to runway 34R. During taxi in I was instructed to contact slc TRACON by phone; which I did and he asked what had occurred and I relayed a shorter version with not as many facts. He was very polite; professional; and understanding.

Original NASA ASRS Text

Title: Light twin pilot reported encountering severe turbulence and windshear on downwind for the SLC ILS Runway 34L at 10000 feet in IMC. 2000 feet was lost and a terrain warning was received along with a master warning for fuel pressure before control was regained.

Narrative: Had lined up for the ILS 3 at OGD; but at glideslope intercept weather had dropped to 1/4 miles and 400 ft ceilings. Broke off approach and was vectored to the west to see if weather would move through. That didn't occur so we requested an approach to land SLC and were vectored to SLC ILS 34L. Approximately 10 miles downwind in solid IMC; autopilot and altitude hold on and about to turn base we hit a downdraft that dropped us approximately 2000 feet. Horizon ball was all brown; autopilot and altitude were ineffective; the loss of control set off the master warning system due to lack of fuel (at the time we had 750 lbs per side); and the terrain warning went off. Recovery was accomplished; but with a 2000 foot gain (assigned altitude 10000 at the floor of incident approximately 8000 at the ceiling of incident approximately 12000). I was then routed back to the west and north on vectors for sequencing back to the ILS 34L SLC that was shot with a side step on final in VFR conditions to RWY 34R. During taxi in I was instructed to contact SLC TRACON by phone; which I did and he asked what had occurred and I relayed a shorter version with not as many facts. He was very polite; professional; and understanding.

Data retrieved from NASA's ASRS site 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.

Light twin pilot reported encountering severe turbulence and windshear on downwind for the slc ILS runway 34L at 10000 feet in IMC. 2000 feet was lost and a terrain warning was received along with a master warning for fuel pressure before control was regained.