TCASII logic air carrier X TCASII with Y. Standard separation existed. Evasive action climb.

Attributes
ACN	265239
Time
Date	199403
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : atl
State Reference	GA
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 10
ASRS Report	265239
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot conflict : airborne less severe non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	vertical : 1000
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X inbound to atl descending to 11000 ft had a resolution to climb due to air carrier Y level at 10000 ft. If anybody thinks TCASII is a good idea in class a or B airspace, they have no idea of what they're talking about. The system is dangerous in positive controled airspace. It is only a matter of time before 2 airplanes hit because of it. I will have my copy of this report and several others if I have to go to court.

Original NASA ASRS Text

Title: TCASII LOGIC ACR X TCASII WITH Y. STANDARD SEPARATION EXISTED. EVASIVE ACTION CLB.

Narrative: ACR X INBOUND TO ATL DSNDING TO 11000 FT HAD A RESOLUTION TO CLB DUE TO ACR Y LEVEL AT 10000 FT. IF ANYBODY THINKS TCASII IS A GOOD IDEA IN CLASS A OR B AIRSPACE, THEY HAVE NO IDEA OF WHAT THEY'RE TALKING ABOUT. THE SYS IS DANGEROUS IN POSITIVE CTLED AIRSPACE. IT IS ONLY A MATTER OF TIME BEFORE 2 AIRPLANES HIT BECAUSE OF IT. I WILL HAVE MY COPY OF THIS RPT AND SEVERAL OTHERS IF I HAVE TO GO TO COURT.

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.