Medium large transport descending to intercept ILS has TCASII TA then RA. Climbs. Controller says no...

Attributes
ACN	216480
Time
Date	199207
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tul
State Reference	OK
Altitude	agl bound lower : 2500 agl bound upper : 3000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tul
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 15 flight time total : 2200 flight time type : 25
ASRS Report	216480
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 200
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

We were cleared to descend on GS for 36R, when we got a TA and then an RA. It was my second trip in the aircraft and the captain took control. We climbed approximately 500 ft as per the RA. ATC said there was nothing within 500 ft, but the TCASII showed him to be within 200 ft. We did not visually identify traffic.

Original NASA ASRS Text

Title: MLG DSNDING TO INTERCEPT ILS HAS TCASII TA THEN RA. CLBS. CTLR SAYS NO TFC IN AREA.

Narrative: WE WERE CLRED TO DSND ON GS FOR 36R, WHEN WE GOT A TA AND THEN AN RA. IT WAS MY SECOND TRIP IN THE ACFT AND THE CAPT TOOK CTL. WE CLBED APPROX 500 FT AS PER THE RA. ATC SAID THERE WAS NOTHING WITHIN 500 FT, BUT THE TCASII SHOWED HIM TO BE WITHIN 200 FT. WE DID NOT VISUALLY IDENT 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.

Medium large transport descending to intercept ILS has TCASII TA then RA. Climbs. Controller says no traffic in area.