Medium large transport on approach cleared to left runway. When reporting field in sight, clearance ...

Attributes
ACN	195352
Time
Date	199111
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : den
State Reference	CO
Altitude	msl bound lower : 6200 msl bound upper : 6200
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : den
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 5000 flight time type : 1300
ASRS Report	195352
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 250 vertical : 75
Supplementary
Primary Problem	Ambiguous

Narrative:

Approach initially gave us clearance for runway 26L which I expected. However, after calling traffic ahead of us and us reporting in sight instructions were changed for a visual to runway 26R. This I must say struck me as odd and I repeated the instruction to the captain. He agreed that it was an approach to runway 26R. I proceeded to cross the path of 26L and lined up with 26R. At about my 3 O'clock I saw an aircraft on a constant bearing to us. I called attention to the traffic and asked if he knew of the traffic. The captain saw the traffic and queried the tower at the same time whether we were cleared to land on 26R. Tower responded in the affirmative as to the traffic tower said it was 'for the parallel.' as I narrate this, the aircraft kept coming closer which I kept pointing out. We queried the tower once more. At this time we saw the aircraft dangerously close and obviously lining for 26R. Called the tower to inform we were initiating a go around. Tower came back with an agitated voice that we were now cleared for a 26L approach. An uneventful landing followed. As to the other aircraft they started an evasive maneuver at about the same time, but after conflict was resolved was able to land on 26R. Callback conversation with reporter revealed the following information: reporter states he felt captain was going to follow up so he did not. Report sent to chief pilot and reporter has heard no more. Captain did not see the large transport proximity right away thus not as anxious as first officer.

Original NASA ASRS Text

Title: MLG ON APCH CLRED TO L RWY. WHEN RPTING FIELD IN SIGHT, CLRNC CHANGED TO R RWY. NMAC WITH LGT ON FINAL.

Narrative: APCH INITIALLY GAVE US CLRNC FOR RWY 26L WHICH I EXPECTED. HOWEVER, AFTER CALLING TFC AHEAD OF US AND US RPTING IN SIGHT INSTRUCTIONS WERE CHANGED FOR A VISUAL TO RWY 26R. THIS I MUST SAY STRUCK ME AS ODD AND I REPEATED THE INSTRUCTION TO THE CAPT. HE AGREED THAT IT WAS AN APCH TO RWY 26R. I PROCEEDED TO CROSS THE PATH OF 26L AND LINED UP WITH 26R. AT ABOUT MY 3 O'CLOCK I SAW AN ACFT ON A CONSTANT BEARING TO US. I CALLED ATTN TO THE TFC AND ASKED IF HE KNEW OF THE TFC. THE CAPT SAW THE TFC AND QUERIED THE TWR AT THE SAME TIME WHETHER WE WERE CLRED TO LAND ON 26R. TWR RESPONDED IN THE AFFIRMATIVE AS TO THE TFC TWR SAID IT WAS 'FOR THE PARALLEL.' AS I NARRATE THIS, THE ACFT KEPT COMING CLOSER WHICH I KEPT POINTING OUT. WE QUERIED THE TWR ONCE MORE. AT THIS TIME WE SAW THE ACFT DANGEROUSLY CLOSE AND OBVIOUSLY LINING FOR 26R. CALLED THE TWR TO INFORM WE WERE INITIATING A GAR. TWR CAME BACK WITH AN AGITATED VOICE THAT WE WERE NOW CLRED FOR A 26L APCH. AN UNEVENTFUL LNDG FOLLOWED. AS TO THE OTHER ACFT THEY STARTED AN EVASIVE MANEUVER AT ABOUT THE SAME TIME, BUT AFTER CONFLICT WAS RESOLVED WAS ABLE TO LAND ON 26R. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES HE FELT CAPT WAS GOING TO FOLLOW UP SO HE DID NOT. RPT SENT TO CHIEF PLT AND RPTR HAS HEARD NO MORE. CAPT DID NOT SEE THE LGT PROX RIGHT AWAY THUS NOT AS ANXIOUS AS FO.

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.

Medium large transport on approach cleared to left runway. When reporting field in sight, clearance changed to right runway. Near midair collision with large transport on final.