TCASII RA flown without sighting traffic when leveling north of denver.

Attributes
ACN	484490
Time
Date	200009
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : dvv.vortac
State Reference	CO
Altitude	msl bound lower : 13000 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d01.tracon
Operator	common carrier : air carrier
Make Model Name	Do 328 TP (Turboprop)
Operating Under FAR Part	Part 121
Navigation In Use	other Other
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : d01.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : multi engine pilot : atp pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 5000 flight time type : 2000
ASRS Report	484490
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	aircraft equipment : tcas
Resolutory Action	flight crew : returned to assigned altitude flight crew : took evasive action other
Supplementary
Problem Areas	Airspace Structure ATC Human Performance
Primary Problem	Airspace Structure

Narrative:

Upon leveling during descent at 13000 ft we received RA 'climb crossing climb' followed by 'climb climb.' evasive action was taken immediately resulting in a climb to 14000 ft to avoid unknown traffic. Traffic was never seen and we cleared uneventfully, reported incident to ATC and returned to 13000 ft MSL.

Original NASA ASRS Text

Title: TCASII RA FLOWN WITHOUT SIGHTING TFC WHEN LEVELING N OF DENVER.

Narrative: UPON LEVELING DURING DSCNT AT 13000 FT WE RECEIVED RA 'CLB XING CLB' FOLLOWED BY 'CLB CLB.' EVASIVE ACTION WAS TAKEN IMMEDIATELY RESULTING IN A CLB TO 14000 FT TO AVOID UNKNOWN TFC. TFC WAS NEVER SEEN AND WE CLRED UNEVENTFULLY, RPTED INCIDENT TO ATC AND RETURNED TO 13000 FT MSL.

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.