A light single engine aircraft en route from enw to ues encountered rime ice at 3000 ft MSL.

Attributes
ACN	427056
Time
Date	199901
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ues.airport
State Reference	WI
Altitude	msl bound lower : 1600 msl bound upper : 3000
Environment
Flight Conditions	IMC
Weather Elements	Rain Ice
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mke.tracon
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	other
Function	observation : observer
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 52 flight time total : 205 flight time type : 75
ASRS Report	427056
Person 2
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Events
Anomaly	inflight encounter : weather inflight encounter other non adherence : far
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : landed in emergency condition
Supplementary
Problem Areas	Weather Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On a flight IFR from kenosha, wi, to waukesha, wi, I was responsible for the radios and navigation. At a cruising altitude of 3000 ft MSL, we received a delay vector for traffic going into waukesha on the ILS runway 10. At this time we were in IMC and the temperatures were above freezing during departure and cruise. As we accepted the delay vector, our plane started to pick up severe rime icing. I reported this to approach control and he cleared us down to the MVA of 2800 ft MSL. Within seconds, the ice had built up enough to decrease performance where full power and a best rate of climb airspeed were needed to maintain altitude. Soon we could not maintain altitude any longer. Right after the severe icing started the PF stressed that we needed direct to the airport immediately. The controller then gave us a vector immediately. As we descended through 2300 ft MSL, we had ground contact through a layer of scattered clouds. At approximately 1600 ft MSL and 3 mi southwest of the airport, I spotted the beacon, then the runway. I then took the airplane and landed safely on runway 36 in waukesha.

Original NASA ASRS Text

Title: A LIGHT SINGLE ENG ACFT ENRTE FROM ENW TO UES ENCOUNTERED RIME ICE AT 3000 FT MSL.

Narrative: ON A FLT IFR FROM KENOSHA, WI, TO WAUKESHA, WI, I WAS RESPONSIBLE FOR THE RADIOS AND NAV. AT A CRUISING ALT OF 3000 FT MSL, WE RECEIVED A DELAY VECTOR FOR TFC GOING INTO WAUKESHA ON THE ILS RWY 10. AT THIS TIME WE WERE IN IMC AND THE TEMPS WERE ABOVE FREEZING DURING DEP AND CRUISE. AS WE ACCEPTED THE DELAY VECTOR, OUR PLANE STARTED TO PICK UP SEVERE RIME ICING. I RPTED THIS TO APCH CTL AND HE CLRED US DOWN TO THE MVA OF 2800 FT MSL. WITHIN SECONDS, THE ICE HAD BUILT UP ENOUGH TO DECREASE PERFORMANCE WHERE FULL PWR AND A BEST RATE OF CLB AIRSPD WERE NEEDED TO MAINTAIN ALT. SOON WE COULD NOT MAINTAIN ALT ANY LONGER. RIGHT AFTER THE SEVERE ICING STARTED THE PF STRESSED THAT WE NEEDED DIRECT TO THE ARPT IMMEDIATELY. THE CTLR THEN GAVE US A VECTOR IMMEDIATELY. AS WE DSNDED THROUGH 2300 FT MSL, WE HAD GND CONTACT THROUGH A LAYER OF SCATTERED CLOUDS. AT APPROX 1600 FT MSL AND 3 MI SW OF THE ARPT, I SPOTTED THE BEACON, THEN THE RWY. I THEN TOOK THE AIRPLANE AND LANDED SAFELY ON RWY 36 IN WAUKESHA.

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.