An airline fokker 100 cruising at FL280 descends to FL276 upon receiving a TCASII RA.

Attributes
ACN	428112
Time
Date	199902
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zme.artcc
State Reference	TN
Altitude	msl bound lower : 27600 msl bound upper : 28000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zme.artcc tower : mem.tower
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	other other vortac
Flight Phase	cruise : enroute altitude change cruise : level
Route In Use	enroute airway : ns.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	428112
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : took evasive action
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While cruising at assigned altitude of FL280, TCASII RA alert 'descend.' followed alert, descended to FL276 before advisories 'monitor vertical speed' and 'clear of conflict.' then returned to FL280. Advised ATC immediately of our actions. No further problems.

Original NASA ASRS Text

Title: AN AIRLINE FOKKER 100 CRUISING AT FL280 DSNDS TO FL276 UPON RECEIVING A TCASII RA.

Narrative: WHILE CRUISING AT ASSIGNED ALT OF FL280, TCASII RA ALERT 'DSND.' FOLLOWED ALERT, DSNDED TO FL276 BEFORE ADVISORIES 'MONITOR VERT SPD' AND 'CLR OF CONFLICT.' THEN RETURNED TO FL280. ADVISED ATC IMMEDIATELY OF OUR ACTIONS. NO FURTHER PROBS.

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.