Large transport has TCASII RA with medium large transport.

Attributes
ACN	247087
Time
Date	199307
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : den
State Reference	CO
Altitude	msl bound lower : 11000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : den
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time total : 16000
ASRS Report	247087
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 9500 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Being vectored to final to runway 26R at den, heading 340 degrees at 11000 ft. Received TA from TCASII that went to RA with instruction to climb. First officer started to climb when company medium large transport was seen coming straight at us at 11000 ft. ATC gave us a left turn to 260 degrees at this time and the medium large transport was in a left turn when we saw him. Don't believe that 2 aircraft should be coming at each other at the same altitude within 3 mi of each other. During the turns, all crew members, believe that the 2 aircraft were 1 1/2 - 2 mi apart. Needless to say this is not a good situation. Talked to ATC and company aircraft was told about us and he informed ATC that he had us in sight. When ATC was calling us his transmission was blocked by other aircraft arriving den. ATC claimed aircraft did not get within 3 mi of each other. Continued left turn to final and landed.

Original NASA ASRS Text

Title: LGT HAS TCASII RA WITH MLG.

Narrative: BEING VECTORED TO FINAL TO RWY 26R AT DEN, HDG 340 DEGS AT 11000 FT. RECEIVED TA FROM TCASII THAT WENT TO RA WITH INSTRUCTION TO CLB. FO STARTED TO CLB WHEN COMPANY MLG WAS SEEN COMING STRAIGHT AT US AT 11000 FT. ATC GAVE US A L TURN TO 260 DEGS AT THIS TIME AND THE MLG WAS IN A L TURN WHEN WE SAW HIM. DON'T BELIEVE THAT 2 ACFT SHOULD BE COMING AT EACH OTHER AT THE SAME ALT WITHIN 3 MI OF EACH OTHER. DURING THE TURNS, ALL CREW MEMBERS, BELIEVE THAT THE 2 ACFT WERE 1 1/2 - 2 MI APART. NEEDLESS TO SAY THIS IS NOT A GOOD SIT. TALKED TO ATC AND COMPANY ACFT WAS TOLD ABOUT US AND HE INFORMED ATC THAT HE HAD US IN SIGHT. WHEN ATC WAS CALLING US HIS XMISSION WAS BLOCKED BY OTHER ACFT ARRIVING DEN. ATC CLAIMED ACFT DID NOT GET WITHIN 3 MI OF EACH OTHER. CONTINUED L TURN TO FINAL AND LANDED.

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.