Flight crew noticed spacing decreasing on following aircraft on the TCASII screen and queried tower.

Attributes
ACN	244013
Time
Date	199306
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ind
State Reference	IN
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ind
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Route In Use	approach : visual
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 16000 flight time type : 5000
ASRS Report	244013
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
ASRS Report	244012
Events
Anomaly	other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure other

Narrative:

On final approach to runway 23R we were cleared to land by ind tower. We then questioned tower as to the intentions of an aircraft we noted on our TCASII display behind and to our right. Tower said he was going to follow us visually, and turn in behind us. On a subsequent telephone call to ind tower chief regarding this matter, he said tower tapes confirmed that we had been cleared for the approach to, and cleared to land on runway 23R. He said there was some sort of mixup in the instructions to the light transport that led him to believe we were going to runway 23L. He did not elaborate, except to say that approach did confirm that the light transport had us in sight visually.

Original NASA ASRS Text

Title: FLC NOTICED SPACING DECREASING ON FOLLOWING ACFT ON THE TCASII SCREEN AND QUERIED TWR.

Narrative: ON FINAL APCH TO RWY 23R WE WERE CLRED TO LAND BY IND TWR. WE THEN QUESTIONED TWR AS TO THE INTENTIONS OF AN ACFT WE NOTED ON OUR TCASII DISPLAY BEHIND AND TO OUR R. TWR SAID HE WAS GOING TO FOLLOW US VISUALLY, AND TURN IN BEHIND US. ON A SUBSEQUENT TELEPHONE CALL TO IND TWR CHIEF REGARDING THIS MATTER, HE SAID TWR TAPES CONFIRMED THAT WE HAD BEEN CLRED FOR THE APCH TO, AND CLRED TO LAND ON RWY 23R. HE SAID THERE WAS SOME SORT OF MIXUP IN THE INSTRUCTIONS TO THE LTT THAT LED HIM TO BELIEVE WE WERE GOING TO RWY 23L. HE DID NOT ELABORATE, EXCEPT TO SAY THAT APCH DID CONFIRM THAT THE LTT HAD US IN SIGHT VISUALLY.

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.