Air carrier X TCASII RA climb non adherence to ATC clearance evasive action taken. Pilot deviation.

Attributes
ACN	201912
Time
Date	199202
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : den
State Reference	CO
Altitude	msl bound lower : 13400 msl bound upper : 13400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : den tower : mia
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
ASRS Report	201912
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot conflict : nmac non adherence : clearance non adherence : far
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 0 vertical : 400
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X 20 mi southwest of denver. We were inbound on the denver 213 radial when we were instructed by denver approach to descend from 15000 ft to 11000 ft slow to 170 KTS and turn to 010 heading radar vectors runway 8L den. While descending out of about 13400 ft, we encountered a TCASII alert instructing us to climb at once at a vertical speed between 1500-2000 FPM. We initiated the climb and advised approach of our intentions. Approach control replied by instructing us not to climb due to traffic above us 400 ft. I continued the climb and the captain restated we were climbing due to the TCASII alert and to move the conflicting traffic. The controller gave the medium large transport a 090 heading. Moments after that we noticed the medium large transport below us moving left to right, under our nose. We then proceeded to land following the medium large transport into denver. Our aircraft is an light transport.

Original NASA ASRS Text

Title: ACR X TCASII RA CLB NON ADHERENCE TO ATC CLRNC EVASIVE ACTION TAKEN. PLTDEV.

Narrative: ACR X 20 MI SW OF DENVER. WE WERE INBOUND ON THE DENVER 213 RADIAL WHEN WE WERE INSTRUCTED BY DENVER APCH TO DSND FROM 15000 FT TO 11000 FT SLOW TO 170 KTS AND TURN TO 010 HDG RADAR VECTORS RWY 8L DEN. WHILE DSNDING OUT OF ABOUT 13400 FT, WE ENCOUNTERED A TCASII ALERT INSTRUCTING US TO CLB AT ONCE AT A VERT SPD BTWN 1500-2000 FPM. WE INITIATED THE CLB AND ADVISED APCH OF OUR INTENTIONS. APCH CTL REPLIED BY INSTRUCTING US NOT TO CLB DUE TO TFC ABOVE US 400 FT. I CONTINUED THE CLB AND THE CAPT RESTATED WE WERE CLBING DUE TO THE TCASII ALERT AND TO MOVE THE CONFLICTING TFC. THE CTLR GAVE THE MLG A 090 HDG. MOMENTS AFTER THAT WE NOTICED THE MLG BELOW US MOVING L TO R, UNDER OUR NOSE. WE THEN PROCEEDED TO LAND FOLLOWING THE MLG INTO DENVER. OUR ACFT IS AN LTT.

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.