Air carrier mg approach landing in wxt repored below airport landing minimums.

Attributes
ACN	154908
Time
Date	199008
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : day
State Reference	OH
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : day tower : day artcc : zid
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 pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 3500
ASRS Report	154908
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 6600 flight time type : 1500
ASRS Report	155666
Events
Anomaly	non adherence : far non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

Approaching the OM on runway 6L dayton, approach control reported varying RVR with T/D currently at 1600. We were then handed over to dayton tower just prior to the marker and we reported approaching the marker. Just as dayton tower issued landing clearance and an RVR report, the autoplt disengaged and the aircraft began to descend. This confusion resulted in our 'turning out' what the tower controller said the RVR was, so once the autoplt was reengaged and operating normally I reinquired of the tower as to the RVR and was told it was 700'. I elected to continue the approach (CAT ii) and saw and landed on runway 6L west/O further incident. The reason for this report is that I am not sure if the below limit RVR was announced to us just prior to or after interception of the final approach segment of the approach.

Original NASA ASRS Text

Title: ACR MG APCH LNDG IN WXT REPORED BELOW ARPT LNDG MINIMUMS.

Narrative: APCHING THE OM ON RWY 6L DAYTON, APCH CTL RPTED VARYING RVR WITH T/D CURRENTLY AT 1600. WE WERE THEN HANDED OVER TO DAYTON TWR JUST PRIOR TO THE MARKER AND WE RPTED APCHING THE MARKER. JUST AS DAYTON TWR ISSUED LNDG CLRNC AND AN RVR RPT, THE AUTOPLT DISENGAGED AND THE ACFT BEGAN TO DSND. THIS CONFUSION RESULTED IN OUR 'TURNING OUT' WHAT THE TWR CTLR SAID THE RVR WAS, SO ONCE THE AUTOPLT WAS REENGAGED AND OPERATING NORMALLY I REINQUIRED OF THE TWR AS TO THE RVR AND WAS TOLD IT WAS 700'. I ELECTED TO CONTINUE THE APCH (CAT II) AND SAW AND LANDED ON RWY 6L W/O FURTHER INCIDENT. THE REASON FOR THIS RPT IS THAT I AM NOT SURE IF THE BELOW LIMIT RVR WAS ANNOUNCED TO US JUST PRIOR TO OR AFTER INTERCEPTION OF THE FINAL APCH SEGMENT OF THE APCH.

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.