<< >> NASA ASRS Report 411741, August 1998

MD80 flight crew inbound to iah on 12 mi final noticed traffic on TCASII above their aircraft. The pilot turned left to avoid the traffic and later was told the other aircraft was lined up on the wrong parallel runway.

Attributes
ACN	411741
Time
Date	199808
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : iah
State Reference	TX
Altitude	msl bound lower : 2500 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iah
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
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Challenger CL600
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 5000
ASRS Report	411741
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 220 flight time total : 10000 flight time type : 3000
ASRS Report	411733
Events
Anomaly	conflict : nmac incursion : runway non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Operational Error Pilot Deviation

Narrative:

On GS at approximately 2500 ft, runway 27 ILS iah noticed target superimposed us on TCASII screen showing 1000 ft above. TCASII display target was superimposed so that the readout wasn't legible. We broke off approach to south and asked tower if there was an aircraft above us, the controller commanded a left turn heading 180 degrees. No TCASII warnings or alerts were displayed or received at any time. The target was a challenger business jet on wrong parallel runway approach. Additionally, the tower final monitor did not pick up the conflict. We believe conflict was within 300 ft vertical, zero ft horizontal. The cpr jets need TCASII. Supplemental information from acn 411733: an aircraft was noticed on the TCASII screen directly overhead at 700 ft and descending. The challenger jet above did not receive any alerts because of no TCASII installation. The challenger was supposed to be lined up for runway 26, is what we were told by the TRACON supervisor. There was also training going on at the time. It is my feeling that a controller mistake was made as this aircraft was directly overhead and descending unknowing that we were there to a distance of 300 ft vertically. Why no one but us noticed this I don't know.

Related reports:

• Cargo flight inbound told that departing aircraft, turning t...
• While inbound on an arrival, an air carrier flight crew fail...
• An E-170 flight crew on the river visual to dca experienced ...
• Small aircraft on IFR training flight failed to report molts...
• Flight crew flying 737-700 aircraft delays departure due to ...
• Atx BE99 cargo flight inbound to bfi was given descent from ...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: MD80 FLC INBOUND TO IAH ON 12 MI FINAL NOTICED TFC ON TCASII ABOVE THEIR ACFT. THE PLT TURNED L TO AVOID THE TFC AND LATER WAS TOLD THE OTHER ACFT WAS LINED UP ON THE WRONG PARALLEL RWY.

Narrative: ON GS AT APPROX 2500 FT, RWY 27 ILS IAH NOTICED TARGET SUPERIMPOSED US ON TCASII SCREEN SHOWING 1000 FT ABOVE. TCASII DISPLAY TARGET WAS SUPERIMPOSED SO THAT THE READOUT WASN'T LEGIBLE. WE BROKE OFF APCH TO S AND ASKED TWR IF THERE WAS AN ACFT ABOVE US, THE CTLR COMMANDED A L TURN HDG 180 DEGS. NO TCASII WARNINGS OR ALERTS WERE DISPLAYED OR RECEIVED AT ANY TIME. THE TARGET WAS A CHALLENGER BUSINESS JET ON WRONG PARALLEL RWY APCH. ADDITIONALLY, THE TWR FINAL MONITOR DID NOT PICK UP THE CONFLICT. WE BELIEVE CONFLICT WAS WITHIN 300 FT VERT, ZERO FT HORIZ. THE CPR JETS NEED TCASII. SUPPLEMENTAL INFO FROM ACN 411733: AN ACFT WAS NOTICED ON THE TCASII SCREEN DIRECTLY OVERHEAD AT 700 FT AND DSNDING. THE CHALLENGER JET ABOVE DID NOT RECEIVE ANY ALERTS BECAUSE OF NO TCASII INSTALLATION. THE CHALLENGER WAS SUPPOSED TO BE LINED UP FOR RWY 26, IS WHAT WE WERE TOLD BY THE TRACON SUPVR. THERE WAS ALSO TRAINING GOING ON AT THE TIME. IT IS MY FEELING THAT A CTLR MISTAKE WAS MADE AS THIS ACFT WAS DIRECTLY OVERHEAD AND DSNDING UNKNOWING THAT WE WERE THERE TO A DISTANCE OF 300 FT VERTLY. WHY NO ONE BUT US NOTICED THIS I DON'T KNOW.

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.