Left assigned altitude because of a TCASII RA.

Attributes
ACN	242083
Time
Date	199305
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mod
State Reference	CA
Altitude	msl bound lower : 28000 msl bound upper : 28500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp
Experience	flight time total : 18000
ASRS Report	242083
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 1000
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Received TCASII RA to climb. Started climb, leaving assigned cruise altitude of 28000 ft. Visually picked up traffic below us and stopped climb and returned to cruise altitude. Advised ATC. I believe RA received because of traffic's rate of climb.

Original NASA ASRS Text

Title: LEFT ASSIGNED ALT BECAUSE OF A TCASII RA.

Narrative: RECEIVED TCASII RA TO CLB. STARTED CLB, LEAVING ASSIGNED CRUISE ALT OF 28000 FT. VISUALLY PICKED UP TFC BELOW US AND STOPPED CLB AND RETURNED TO CRUISE ALT. ADVISED ATC. I BELIEVE RA RECEIVED BECAUSE OF TFC'S RATE OF CLB.

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.