Small aircraft east of slc unable to maintain altitude because of ice buildup on airframe.

Attributes
ACN	443921
Time
Date	199907
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : slc.airport
State Reference	UT
Altitude	msl single value : 19000
Environment
Flight Conditions	IMC
Weather Elements	Ice
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zlc.artcc
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : captain oversight : pic
Qualification	pilot : private pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 50 flight time total : 2500 flight time type : 50
ASRS Report	443921
Person 2
Affiliation	other
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : private pilot : instrument
Events
Anomaly	aircraft equipment problem : critical inflight encounter : weather inflight encounter other non adherence : clearance non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : ice other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : exited adverse environment none taken : anomaly accepted
Supplementary
Problem Areas	Weather Environmental Factor Aircraft Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

Freezing rain and ice at FL190 between slc and den. Lost 1500 ft. Asked for block altitude and was given 16000 ft through FL190. Was able to maintain control and slowly climb back to FL190.

Original NASA ASRS Text

Title: SMA E OF SLC UNABLE TO MAINTAIN ALT BECAUSE OF ICE BUILDUP ON AIRFRAME.

Narrative: FREEZING RAIN AND ICE AT FL190 BTWN SLC AND DEN. LOST 1500 FT. ASKED FOR BLOCK ALT AND WAS GIVEN 16000 FT THROUGH FL190. WAS ABLE TO MAINTAIN CTL AND SLOWLY CLB BACK TO FL190.

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.