Flight crew of medium large transport took off with RVR 6000.

Attributes
ACN	194965
Time
Date	199111
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 200 flight time total : 20000 flight time type : 4000
ASRS Report	194965
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Events
Anomaly	other anomaly other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other
Situations
Publication	Unspecified

Narrative:

An unusual surface visibility situation presented itself to us during takeoff at seatac. The TDZ RVR was 6000 ft, mid RVR 500 ft and rollout RVR 500 ft. After digging through our operations specifications, we learned that with a min of 1600 ft RVR at the touchdown zone, proper markings and lighting, the mid and rollout RVR became advisory and not controling. We departed 34R after an inquiry from the tower and a caustic comment from another carrier.

Original NASA ASRS Text

Title: FLC OF MLG TOOK OFF WITH RVR 6000.

Narrative: AN UNUSUAL SURFACE VISIBILITY SITUATION PRESENTED ITSELF TO US DURING TKOF AT SEATAC. THE TDZ RVR WAS 6000 FT, MID RVR 500 FT AND ROLLOUT RVR 500 FT. AFTER DIGGING THROUGH OUR OPS SPECS, WE LEARNED THAT WITH A MIN OF 1600 FT RVR AT THE TOUCHDOWN ZONE, PROPER MARKINGS AND LIGHTING, THE MID AND ROLLOUT RVR BECAME ADVISORY AND NOT CTLING. WE DEPARTED 34R AFTER AN INQUIRY FROM THE TWR AND A CAUSTIC COMMENT FROM ANOTHER CARRIER.

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.