TCASII commanded a descent to avoid traffic previously pointed out by ATC.

Attributes
ACN	197278
Time
Date	199112
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : day
State Reference	OH
Altitude	msl bound lower : 3500 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : day tower : smo
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise 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 : 200 flight time total : 7200 flight time type : 2200
ASRS Report	197278
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 700
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Cruising at 4000 ft, traffic was pointed out to us at 10 O'clock at 4500. 1 min later, our 'TCASII' equipment gave us a 'RA' ordering us to descend 1500-2000 ft. We leveled at 3500 and told the controller we had a TCASII altitude deviation. He said no problem, and we climbed back up to 4000 ft. We asked him if there was paperwork he needed to fill out, he said no. Personally I thought there was some type of paperwork they (ATC) needed to fill out.

Original NASA ASRS Text

Title: TCASII COMMANDED A DSCNT TO AVOID TFC PREVIOUSLY POINTED OUT BY ATC.

Narrative: CRUISING AT 4000 FT, TFC WAS POINTED OUT TO US AT 10 O'CLOCK AT 4500. 1 MIN LATER, OUR 'TCASII' EQUIP GAVE US A 'RA' ORDERING US TO DSND 1500-2000 FT. WE LEVELED AT 3500 AND TOLD THE CTLR WE HAD A TCASII ALTDEV. HE SAID NO PROBLEM, AND WE CLBED BACK UP TO 4000 FT. WE ASKED HIM IF THERE WAS PAPERWORK HE NEEDED TO FILL OUT, HE SAID NO. PERSONALLY I THOUGHT THERE WAS SOME TYPE OF PAPERWORK THEY (ATC) NEEDED TO FILL OUT.

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.