Large transport has TCASII RA activate inside the OM.

Attributes
ACN	237290
Time
Date	199303
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	agl bound lower : 800 agl bound upper : 2100
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : atl
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
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 : 150 flight time total : 12000 flight time type : 150
ASRS Report	237290
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : atp pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : published procedure non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

We received a TCASII RA instructing a 1500 FPM descent while IMC, inside the OM at 2100 ft MSL (1000 ft AGL), on approach to runway 8L in atl. We descended slightly below GS while assessing the TCASII and informing tower of the RA. We leveled at 800 ft AGL until tower verified no traffic. The RA continued until 1 mi from runway. We had acquired the field visually by the time. I verified no traffic.

Original NASA ASRS Text

Title: LGT HAS TCASII RA ACTIVATE INSIDE THE OM.

Narrative: WE RECEIVED A TCASII RA INSTRUCTING A 1500 FPM DSCNT WHILE IMC, INSIDE THE OM AT 2100 FT MSL (1000 FT AGL), ON APCH TO RWY 8L IN ATL. WE DSNDED SLIGHTLY BELOW GS WHILE ASSESSING THE TCASII AND INFORMING TWR OF THE RA. WE LEVELED AT 800 FT AGL UNTIL TWR VERIFIED NO TFC. THE RA CONTINUED UNTIL 1 MI FROM RWY. WE HAD ACQUIRED THE FIELD VISUALLY BY THE TIME. I VERIFIED NO TFC.

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.