Near midair collision.

Attributes
ACN	292500
Time
Date	199412
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : den
State Reference	CO
Altitude	agl bound lower : 1000 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : den tower : den
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 200 flight time total : 14500 flight time type : 9500
ASRS Report	292500
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 500 vertical : 50
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

We were cleared for a visual approach to runway 26L to follow a company B757. A company B727 was to be along side for runway 26R. (Runways have approximately 1000 ft separation.) both aircraft were in sight at all times. Due to an approach control error, the other B727 was actually cleared for the visual to runway 26L also. We were approaching the extended centerline from the south, the other B727 from the north. As we began to converge (both aircraft angling to final) we began to sense something was wrong. Both aircraft switched to tower at the marker and blocked each other's initial transmission. By now we both realized the problem and we both began to break off toward runway 26R. Shortly thereafter, tower communications were established and everything was sorted out.

Original NASA ASRS Text

Title: NMAC.

Narrative: WE WERE CLRED FOR A VISUAL APCH TO RWY 26L TO FOLLOW A COMPANY B757. A COMPANY B727 WAS TO BE ALONG SIDE FOR RWY 26R. (RWYS HAVE APPROX 1000 FT SEPARATION.) BOTH ACFT WERE IN SIGHT AT ALL TIMES. DUE TO AN APCH CTL ERROR, THE OTHER B727 WAS ACTUALLY CLRED FOR THE VISUAL TO RWY 26L ALSO. WE WERE APCHING THE EXTENDED CTRLINE FROM THE S, THE OTHER B727 FROM THE N. AS WE BEGAN TO CONVERGE (BOTH ACFT ANGLING TO FINAL) WE BEGAN TO SENSE SOMETHING WAS WRONG. BOTH ACFT SWITCHED TO TWR AT THE MARKER AND BLOCKED EACH OTHER'S INITIAL XMISSION. BY NOW WE BOTH REALIZED THE PROB AND WE BOTH BEGAN TO BREAK OFF TOWARD RWY 26R. SHORTLY THEREAFTER, TWR COMS WERE ESTABLISHED AND EVERYTHING WAS SORTED OUT.

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.