Medium large transport has TCASII TA on ILS approach.

Attributes
ACN	243045
Time
Date	199305
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw
State Reference	TX
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : dfw
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 : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 225 flight time total : 3925 flight time type : 1200
ASRS Report	243045
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Flying the visual approach to runway 18R at dfw we received a TA on our TCASII inside the marker. We were backing the approach up by the ILS/DME 18R. It was a short final. We intercepted the localizer about 3-4 mi outside the marker. It was a busy approach for me as the PNF in the medium large transport. Configure the airplane, switch to tower, and look for traffic. This all taking place just outside or at the marker. While slowing and configuring to our landing flaps we got a TA below us. My attention then went to locating the traffic because we were descending on the glide path inside the marker. It appeared the traffic was over the highway below us. TCASII altitude showed the TA just above AGL. I never saw the aircraft, tower did not report it either. The FAA operations examiner said he thought he saw a helicopter or it must have been a helicopter (he was on the jump seat). We continued the approach because it never resulted in a TCASII RA. The rest of the before landing checklist was accomplished in a hurry by memory. The bottom line is that the TA distracted us on final. Being in VMC helped. If it had been in IMC it could have caused further concern.

Original NASA ASRS Text

Title: MLG HAS TCASII TA ON ILS APCH.

Narrative: FLYING THE VISUAL APCH TO RWY 18R AT DFW WE RECEIVED A TA ON OUR TCASII INSIDE THE MARKER. WE WERE BACKING THE APCH UP BY THE ILS/DME 18R. IT WAS A SHORT FINAL. WE INTERCEPTED THE LOC ABOUT 3-4 MI OUTSIDE THE MARKER. IT WAS A BUSY APCH FOR ME AS THE PNF IN THE MLG. CONFIGURE THE AIRPLANE, SWITCH TO TWR, AND LOOK FOR TFC. THIS ALL TAKING PLACE JUST OUTSIDE OR AT THE MARKER. WHILE SLOWING AND CONFIGURING TO OUR LNDG FLAPS WE GOT A TA BELOW US. MY ATTN THEN WENT TO LOCATING THE TFC BECAUSE WE WERE DSNDING ON THE GLIDE PATH INSIDE THE MARKER. IT APPEARED THE TFC WAS OVER THE HWY BELOW US. TCASII ALT SHOWED THE TA JUST ABOVE AGL. I NEVER SAW THE ACFT, TWR DID NOT RPT IT EITHER. THE FAA OPS EXAMINER SAID HE THOUGHT HE SAW A HELI OR IT MUST HAVE BEEN A HELI (HE WAS ON THE JUMP SEAT). WE CONTINUED THE APCH BECAUSE IT NEVER RESULTED IN A TCASII RA. THE REST OF THE BEFORE LNDG CHKLIST WAS ACCOMPLISHED IN A HURRY BY MEMORY. THE BOTTOM LINE IS THAT THE TA DISTRACTED US ON FINAL. BEING IN VMC HELPED. IF IT HAD BEEN IN IMC IT COULD HAVE CAUSED FURTHER CONCERN.

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.