FK100 flight crew follows TCASII RA while in cruise.

Attributes
ACN	440083
Time
Date	199906
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zfw.artcc
State Reference	TX
Altitude	msl bound lower : 27000 msl bound upper : 27300
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw.artcc
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zfw.artcc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
ASRS Report	440083
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
Independent Detector	aircraft equipment : tcas other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory flight crew : returned to original clearance
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

While cruising at FL270 we received a traffic alert followed by a command to descend. The first officer (the PF) disconnected the autoplt and followed the commands. ATC then advised us of the traffic and told us the traffic was leveling at FL280. ATC also told us there was traffic ahead at FL260. After we were clear of the FL280 traffic we climbed back up to FL273 before leveling at FL270. We never saw the traffic at FL280 or FL260.

Original NASA ASRS Text

Title: FK100 FLC FOLLOWS TCASII RA WHILE IN CRUISE.

Narrative: WHILE CRUISING AT FL270 WE RECEIVED A TFC ALERT FOLLOWED BY A COMMAND TO DSND. THE FO (THE PF) DISCONNECTED THE AUTOPLT AND FOLLOWED THE COMMANDS. ATC THEN ADVISED US OF THE TFC AND TOLD US THE TFC WAS LEVELING AT FL280. ATC ALSO TOLD US THERE WAS TFC AHEAD AT FL260. AFTER WE WERE CLR OF THE FL280 TFC WE CLBED BACK UP TO FL273 BEFORE LEVELING AT FL270. WE NEVER SAW THE TFC AT FL280 OR FL260.

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.