Medium large transport has TCASII RA. Climbs.

Attributes
ACN	251458
Time
Date	199309
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mkg
State Reference	MI
Altitude	msl bound lower : 25000 msl bound upper : 26000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
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 : 10400 flight time type : 5800
ASRS Report	251458
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

TCASII encounter -- while in cruise at FL250 we received a TCASII alert to climb (2000 FPM). Climb was initiated. Alert continued until we reached FL260. At FL255, the TCASII indicator said the other aircraft was 700 ft below us. ATC was notified. ATC and other aircraft stated that other aircraft had remained at FL240.

Original NASA ASRS Text

Title: MLG HAS TCASII RA. CLBS.

Narrative: TCASII ENCOUNTER -- WHILE IN CRUISE AT FL250 WE RECEIVED A TCASII ALERT TO CLB (2000 FPM). CLB WAS INITIATED. ALERT CONTINUED UNTIL WE REACHED FL260. AT FL255, THE TCASII INDICATOR SAID THE OTHER ACFT WAS 700 FT BELOW US. ATC WAS NOTIFIED. ATC AND OTHER ACFT STATED THAT OTHER ACFT HAD REMAINED AT FL240.

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.