High minimums captain deals with WX below his minimums.

Attributes
ACN	263432
Time
Date	199402
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 90 flight time total : 6000 flight time type : 90
ASRS Report	263432
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	inflight encounter : weather
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation other

Narrative:

We made an approach into ord during a time that had limited visibility. I am a 'high minimums' captain and require 1/2 mi (or equivalent RVR) be added to the published minimums. Approach advised that the visibility was 4000 ft RVR. I relayed to them that I needed at least 5000 ft RVR to be legal. They acknowledged that and told me the tower would advise me if conditions improved at the marker. At an altitude of 4000 ft, we could see the ground and had a forward visibility of over 3 mi. The tower, however, called the RVR at 3500 ft so we initiated a missed approach. At this time, we noticed a large increase in the ice accretion. On the second approach, the tower called the visibility to be 1 1/2 mi from the tower. With over 2 inches of ice adhering to the aircraft, I elected to land and felt that it was the safest course of action. An uneventful landing followed.

Original NASA ASRS Text

Title: HIGH MINIMUMS CAPT DEALS WITH WX BELOW HIS MINIMUMS.

Narrative: WE MADE AN APCH INTO ORD DURING A TIME THAT HAD LIMITED VISIBILITY. I AM A 'HIGH MINIMUMS' CAPT AND REQUIRE 1/2 MI (OR EQUIVALENT RVR) BE ADDED TO THE PUBLISHED MINIMUMS. APCH ADVISED THAT THE VISIBILITY WAS 4000 FT RVR. I RELAYED TO THEM THAT I NEEDED AT LEAST 5000 FT RVR TO BE LEGAL. THEY ACKNOWLEDGED THAT AND TOLD ME THE TWR WOULD ADVISE ME IF CONDITIONS IMPROVED AT THE MARKER. AT AN ALT OF 4000 FT, WE COULD SEE THE GND AND HAD A FORWARD VISIBILITY OF OVER 3 MI. THE TWR, HOWEVER, CALLED THE RVR AT 3500 FT SO WE INITIATED A MISSED APCH. AT THIS TIME, WE NOTICED A LARGE INCREASE IN THE ICE ACCRETION. ON THE SECOND APCH, THE TWR CALLED THE VISIBILITY TO BE 1 1/2 MI FROM THE TWR. WITH OVER 2 INCHES OF ICE ADHERING TO THE ACFT, I ELECTED TO LAND AND FELT THAT IT WAS THE SAFEST COURSE OF ACTION. AN UNEVENTFUL LNDG FOLLOWED.

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.