An air carrier aircraft climbed in response to a TCASII command to avoid a climbing aircraft.

Attributes
ACN	336771
Time
Date	199605
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : djb
State Reference	OH
Altitude	msl bound lower : 25000 msl bound upper : 25500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob tower : gso
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 15000 flight time type : 6000
ASRS Report	336771
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

At cruise FL250, had an aircraft climbing to FL240. The other aircraft was still about 1300 ft below when we got a TCASII 'climb.' we climbed to 25500 ft before clear of conflict. This is another false alert by TCASII. The system needs to be retired.

Original NASA ASRS Text

Title: AN ACR ACFT CLBED IN RESPONSE TO A TCASII COMMAND TO AVOID A CLBING ACFT.

Narrative: AT CRUISE FL250, HAD AN ACFT CLBING TO FL240. THE OTHER ACFT WAS STILL ABOUT 1300 FT BELOW WHEN WE GOT A TCASII 'CLB.' WE CLBED TO 25500 FT BEFORE CLR OF CONFLICT. THIS IS ANOTHER FALSE ALERT BY TCASII. THE SYS NEEDS TO BE RETIRED.

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.