F100 landing dfw experienced close call with other landing aircraft.

Attributes
ACN	577198
Time
Date	200303
Day	Sat
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Aircraft 1
Controlling Facilities	tower : dfw.tower
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 17c other
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : dfw.tower
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	577198
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical non adherence : required legal separation non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took precautionary avoidance action
Miss Distance	vertical : 300
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure

Narrative:

While flying an ILS approach to runway 17C in visual conditions, after passing the OM, we noticed air carrier X MD80 converging with our approach corridor. I, PNF, leveled the aircraft and kept him in sight as he came in front of us on final, and about 300 ft below and about 2 wingspans ahead of us. We advised the tower that we had him in sight and would stay above and behind him. He was on another frequency. We advised tower before they said anything, and he veered back over after lining up on our runway. We landed normally. We should examine this incident in light of the probable outcome if it was IMC conditions during this event. Without corrective action on our part, these aircraft most certainly would have gotten together at about 800-1200 ft on final, and would probably have been unable to control after air impact.

Original NASA ASRS Text

Title: F100 LNDG DFW EXPERIENCED CLOSE CALL WITH OTHER LNDG ACFT.

Narrative: WHILE FLYING AN ILS APCH TO RWY 17C IN VISUAL CONDITIONS, AFTER PASSING THE OM, WE NOTICED ACR X MD80 CONVERGING WITH OUR APCH CORRIDOR. I, PNF, LEVELED THE ACFT AND KEPT HIM IN SIGHT AS HE CAME IN FRONT OF US ON FINAL, AND ABOUT 300 FT BELOW AND ABOUT 2 WINGSPANS AHEAD OF US. WE ADVISED THE TWR THAT WE HAD HIM IN SIGHT AND WOULD STAY ABOVE AND BEHIND HIM. HE WAS ON ANOTHER FREQ. WE ADVISED TWR BEFORE THEY SAID ANYTHING, AND HE VEERED BACK OVER AFTER LINING UP ON OUR RWY. WE LANDED NORMALLY. WE SHOULD EXAMINE THIS INCIDENT IN LIGHT OF THE PROBABLE OUTCOME IF IT WAS IMC CONDITIONS DURING THIS EVENT. WITHOUT CORRECTIVE ACTION ON OUR PART, THESE ACFT MOST CERTAINLY WOULD HAVE GOTTEN TOGETHER AT ABOUT 800-1200 FT ON FINAL, AND WOULD PROBABLY HAVE BEEN UNABLE TO CTL AFTER AIR IMPACT.

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.