An air carrier medium large transport climbed in response to a TCASII command.

Attributes
ACN	233911
Time
Date	199302
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : chs
State Reference	SC
Altitude	msl bound lower : 29000 msl bound upper : 29500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zjx
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
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 6000 flight time type : 2300
ASRS Report	233911
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance flight crew : exited adverse environment flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 15000 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier medium large transport, en route from mco to dca at 29000 ft on the chs 030 degree radial, 40 NM northeast. The TCASII RA alert showed conflicting traffic at 11 O'clock at 300 ft below our altitude. The RA showed a 300 FPM climb to clear the conflict. The captain did just that. We told ZJX of our deviation and they then cleared us back down to 29000 ft. The other aircraft was an light transport and center said they confirmed that they were at 28000 ft.

Original NASA ASRS Text

Title: AN ACR MLG CLBED IN RESPONSE TO A TCASII COMMAND.

Narrative: ACR MLG, ENRTE FROM MCO TO DCA AT 29000 FT ON THE CHS 030 DEG RADIAL, 40 NM NE. THE TCASII RA ALERT SHOWED CONFLICTING TFC AT 11 O'CLOCK AT 300 FT BELOW OUR ALT. THE RA SHOWED A 300 FPM CLB TO CLR THE CONFLICT. THE CAPT DID JUST THAT. WE TOLD ZJX OF OUR DEV AND THEY THEN CLRED US BACK DOWN TO 29000 FT. THE OTHER ACFT WAS AN LTT AND CTR SAID THEY CONFIRMED THAT THEY WERE AT 28000 FT.

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.