Air carrier medium large transport landed at smf in WX reported below airport minimums for landing.

Attributes
ACN	128782
Time
Date	198911
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : smf
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : smf
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 19000 flight time type : 1200
ASRS Report	128782
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	inflight encounter : weather non adherence : published procedure non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

When arriving in smf area and advised of current RVR, asked copilot to check recent bulletin in manual. Re: legality of using CAT IIIA minimums. He checked bulletin and advised we were authority/authorized to use CAT IIIA limits as of 8/sat/89. After landing,I read bulletin myself and discovered authorization did not include me. (Copilot did not read last paragraph of bulletin.) as a result I landed below CAT ii limits, which I am authority/authorized to use. In actuality, runway was VMC. Fog was lying across transmissometers only.

Original NASA ASRS Text

Title: ACR MLG LANDED AT SMF IN WX REPORTED BELOW ARPT MINIMUMS FOR LNDG.

Narrative: WHEN ARRIVING IN SMF AREA AND ADVISED OF CURRENT RVR, ASKED COPLT TO CHK RECENT BULLETIN IN MANUAL. RE: LEGALITY OF USING CAT IIIA MINIMUMS. HE CHKED BULLETIN AND ADVISED WE WERE AUTH TO USE CAT IIIA LIMITS AS OF 8/SAT/89. AFTER LNDG,I READ BULLETIN MYSELF AND DISCOVERED AUTHORIZATION DID NOT INCLUDE ME. (COPLT DID NOT READ LAST PARAGRAPH OF BULLETIN.) AS A RESULT I LANDED BELOW CAT II LIMITS, WHICH I AM AUTH TO USE. IN ACTUALITY, RWY WAS VMC. FOG WAS LYING ACROSS TRANSMISSOMETERS ONLY.

Data retrieved from NASA's ASRS site as of August 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.