Possible traffic conflict when medium large transport with clearance taxies onto active runway.

Attributes
ACN	127641
Time
Date	198911
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : day
State Reference	OH
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	ground : holding ground other : taxi
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other descent : approach
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 150 flight time total : 15000 flight time type : 2000
ASRS Report	127641
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : ground less severe
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

Day tower cleared my flight into position and said there was traffic on a 2 1/2 mi final. I believed he was planning an immediate takeoff so I proceeded onto the runway. At this time he told the traffic on final to break off and land on runway 18. He had to say this several times before the pilot responded, the last time with some excitement in his voice. I do not know if this was an error, or misjudgment, or was planned that way.

Original NASA ASRS Text

Title: POSSIBLE TRAFFIC CONFLICT WHEN MLG WITH CLRNC TAXIES ONTO ACTIVE RWY.

Narrative: DAY TWR CLRED MY FLT INTO POSITION AND SAID THERE WAS TFC ON A 2 1/2 MI FINAL. I BELIEVED HE WAS PLANNING AN IMMEDIATE TKOF SO I PROCEEDED ONTO THE RWY. AT THIS TIME HE TOLD THE TFC ON FINAL TO BREAK OFF AND LAND ON RWY 18. HE HAD TO SAY THIS SEVERAL TIMES BEFORE THE PLT RESPONDED, THE LAST TIME WITH SOME EXCITEMENT IN HIS VOICE. I DO NOT KNOW IF THIS WAS AN ERROR, OR MISJUDGMENT, OR WAS PLANNED THAT WAY.

Data retrieved from NASA's ASRS site as of August 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.