<< >> NASA ASRS Report 983052, December 2011

An SR20 pilot encountering unforecast icing as he approached his destination was unable to maintain his assigned IFR altitude and diverted to a safe landing at a closer airport.

Attributes
ACN	983052
Time
Date	201112
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	SR20
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Direct
Flight Plan	IFR
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 250 Flight Crew Total 600 Flight Crew Type 20
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter Weather / Turbulence

Narrative:

I encountered unforecasted icing conditions after descending to the initial approach altitude for my IFR approach. The airplane built too much ice to maintain altitude and I was forced to declare an emergency. I accepted a diversion from my flight plan into another airport. TRACON vectored me to final for the ILS. I could not maintain my assigned altitude.

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Original NASA ASRS Text

Title: An SR20 pilot encountering unforecast icing as he approached his destination was unable to maintain his assigned IFR altitude and diverted to a safe landing at a closer airport.

Narrative: I encountered unforecasted icing conditions after descending to the initial approach altitude for my IFR approach. The airplane built too much ice to maintain altitude and I was forced to declare an emergency. I accepted a diversion from my flight plan into another airport. TRACON vectored me to final for the ILS. I could not maintain my assigned altitude.

Data retrieved from NASA's ASRS site as of April 2012 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.